diff --git a/.github/workflows/uniffi-version-bump.yaml b/.github/workflows/uniffi-version-bump.yaml
new file mode 100644
index 00000000..ef62d63e
--- /dev/null
+++ b/.github/workflows/uniffi-version-bump.yaml
@@ -0,0 +1,56 @@
+name: "Release: Uniffi"
+
+env:
+  WORKING_DIRECTORY: bindings/uniffi
+
+on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: 'Version'
+        required: true
+        default: 'patch'
+        type: choice
+        options:
+          - patch
+          - minor
+          - major
+
+permissions:
+  contents: write
+
+jobs:
+  publish:
+    name: Version
+    runs-on: ubuntu-latest
+    defaults:
+      run:
+        working-directory: ${{ env.WORKING_DIRECTORY }}
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          persist-credentials: false
+
+      - name: Set Git author
+        run: |
+          git config user.name "Bot"
+          git config user.email "bot@gorules.io"
+
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10'
+
+      - name: 'Install dependencies'
+        run: pip install --upgrade bump2version
+
+      - name: Bumpversion
+        run: bumpversion ${{ github.event.inputs.version }} --allow-dirty --tag-name "uniffi-v{new_version}"
+        env:
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+          NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Push changes
+        uses: ad-m/github-push-action@v0.6.0
+        with:
+          github_token: ${{ secrets.PAT}}
diff --git a/.github/workflows/uniffi.yaml b/.github/workflows/uniffi.yaml
new file mode 100644
index 00000000..9e994745
--- /dev/null
+++ b/.github/workflows/uniffi.yaml
@@ -0,0 +1,137 @@
+name: UniFFI
+env:
+  UNIFFI_DIRECTORY: bindings/uniffi
+
+on:
+  push:
+    branches:
+      - master
+    tags-ignore:
+      - '**'
+    paths:
+      - '../../bindings/uniffi/**'
+      - 'core/**'
+      - 'test-data/**'
+      - '.github/workflows/uniffi.yaml'
+  pull_request:
+    paths:
+      - '../../bindings/uniffi/**'
+      - 'core/**'
+      - 'test-data/**'
+      - '.github/workflows/uniffi.yaml'
+
+jobs:
+  build:
+    if: "!contains(github.event.head_commit.message, 'skip ci')"
+    env:
+      OUTPUT_NAME: zen_uniffi
+
+    strategy:
+      fail-fast: true
+      matrix:
+        settings:
+          - host: windows-latest
+            target: 'x86_64-pc-windows-msvc'
+            output: '{0}.dll'
+            lib_dir: 'win32-x86-64'
+          - host: macos-latest
+            target: 'x86_64-apple-darwin'
+            output: 'lib{0}.dylib'
+            lib_dir: 'darwin-x86-64'
+          - host: macos-latest
+            target: 'aarch64-apple-darwin'
+            output: 'lib{0}.dylib'
+            lib_dir: 'darwin-aarch64'
+          - host: ubuntu-latest
+            target: 'x86_64-unknown-linux-gnu'
+            output: 'lib{0}.so'
+            lib_dir: 'linux-x86-64'
+          - host: ubuntu-latest
+            target: 'aarch64-unknown-linux-gnu'
+            output: 'lib{0}.so'
+            lib_dir: 'linux-aarch64'
+
+    name: UniFFI - ${{ matrix.settings.target }}
+    runs-on: ${{ matrix.settings.host }}
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Setup Rust Toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          target: ${{ matrix.settings.target }}
+
+      - name: Build
+        uses: houseabsolute/actions-rust-cross@v1
+        with:
+          working-directory: ${{ env.UNIFFI_DIRECTORY }}
+          target: ${{ matrix.settings.target }}
+          args: '--lib --release'
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.settings.lib_dir }}
+          path: target/${{ matrix.settings.target }}/release/${{ format(matrix.settings.output, env.OUTPUT_NAME) }}
+          if-no-files-found: error
+
+  release-java-kotlin:
+    runs-on: ubuntu-latest
+    needs: [ build ]
+    if: "startsWith(github.event.head_commit.message, 'chore(release): publish uniffi')"
+    defaults:
+      run:
+        working-directory: ${{ env.UNIFFI_DIRECTORY }}
+
+    steps:
+      - uses: actions/checkout@v3
+      - name: Set up JDK 21
+        uses: actions/setup-java@v4
+        with:
+          java-version: '21'
+          distribution: 'temurin'
+
+      - name: Setup Rust Toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Validate Gradle wrapper jar
+        uses: gradle/actions/wrapper-validation@v3
+
+      - name: Setup Gradle
+        uses: gradle/actions/setup-gradle@v3
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: build/generated/resources
+
+      - name: Move artifacts
+        run: mv ../../build ./
+
+      - name: Generate Kotlin sources
+        run: |
+          cargo run --bin uniffi-bindgen -- generate \
+            --library build/generated/resources/darwin-x86-64/libzen_uniffi.dylib \
+            --language kotlin \
+            --out-dir build/generated/kotlin
+
+      - name: Install uniffi-bindgen-java
+        run: cargo install uniffi-bindgen-java
+
+      - name: Generate Java sources
+        run: |
+          uniffi-bindgen-java generate \
+            --library build/generated/resources/darwin-x86-64/libzen_uniffi.dylib \
+            --out-dir build/generated/java
+
+      - name: Print directory tree
+        run: tree build
+
+      - name: Publish Maven Artifact
+        env:
+          SONATYPE_USERNAME: ${{ secrets.SONATYPE_USERNAME }}
+          SONATYPE_PASSWORD: ${{ secrets.SONATYPE_PASSWORD }}
+          GPG_SIGNING_KEY: ${{ secrets.GPG_SIGNING_KEY }}
+          GPG_SIGNING_PASSPHRASE: ${{ secrets.GPG_SIGNING_PASSPHRASE }}
+        run: ./gradlew publishAllPublicationsToCentralPortal
diff --git a/bindings/uniffi/.bumpversion.cfg b/bindings/uniffi/.bumpversion.cfg
new file mode 100644
index 00000000..2eb98ac5
--- /dev/null
+++ b/bindings/uniffi/.bumpversion.cfg
@@ -0,0 +1,7 @@
+[bumpversion]
+current_version = 0.1.10
+commit = True
+tag = True
+message = chore(release): publish uniffi
+
+[bumpversion:file:Cargo.toml]
\ No newline at end of file
diff --git a/bindings/uniffi/.gitignore b/bindings/uniffi/.gitignore
new file mode 100644
index 00000000..6eb8b6a7
--- /dev/null
+++ b/bindings/uniffi/.gitignore
@@ -0,0 +1,3 @@
+.idea
+.gradle
+build/
diff --git a/bindings/uniffi/Cargo.toml b/bindings/uniffi/Cargo.toml
new file mode 100644
index 00000000..b45005d0
--- /dev/null
+++ b/bindings/uniffi/Cargo.toml
@@ -0,0 +1,25 @@
+[package]
+name = "zen-uniffi"
+version = "0.1.10"
+edition = "2024"
+license = "MIT"
+publish = false
+
+[lib]
+crate-type = ["cdylib"]
+
+[[bin]]
+name = "uniffi-bindgen"
+path = "uniffi-bindgen.rs"
+
+[dependencies]
+uniffi = { version = "0.29", features = ["tokio", "cli"] }
+serde_json = { workspace = true }
+zen-engine = { path = "../../core/engine" }
+zen-expression = { path = "../../core/expression" }
+serde = { workspace = true, features = ["derive"] }
+async-trait = "0.1"
+tokio = "1.46"
+
+[build-dependencies]
+uniffi = { version = "0.29", features = ["build"] }
\ No newline at end of file
diff --git a/bindings/uniffi/Makefile b/bindings/uniffi/Makefile
new file mode 100644
index 00000000..b44dbe8f
--- /dev/null
+++ b/bindings/uniffi/Makefile
@@ -0,0 +1,25 @@
+# Just for local testing, at the moment it relies on .dylib (Mac), feel free to change below
+build:
+	cargo build --lib --release
+	@mkdir -p build/generated/resources
+	cp -f ../../target/release/libzen_uniffi.dylib build/generated/resources/libzen_uniffi.dylib
+
+generate-java:
+	uniffi-bindgen-java generate \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--out-dir build/generated/java
+
+generate-kotlin:
+	cargo run --bin uniffi-bindgen generate \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--language kotlin \
+		--out-dir build/generated/kotlin
+
+generate-csharp:
+	uniffi-bindgen-cs \
+		--library build/generated/resources/libzen_uniffi.dylib \
+		--out-dir build/generated/csharp
+
+all: build generate-java generate-kotlin generate-csharp
+
+.PHONY: all build generate-java generate-kotlin generate-csharp
\ No newline at end of file
diff --git a/bindings/uniffi/build.gradle.kts b/bindings/uniffi/build.gradle.kts
new file mode 100644
index 00000000..45de6658
--- /dev/null
+++ b/bindings/uniffi/build.gradle.kts
@@ -0,0 +1,234 @@
+import org.jetbrains.dokka.gradle.DokkaTask
+import org.tomlj.Toml
+import java.util.*
+
+group = "io.gorules"
+version = loadCargoVersion()
+
+buildscript {
+    dependencies {
+        classpath("org.tomlj:tomlj:1.1.1")
+    }
+}
+
+plugins {
+    kotlin("jvm") version "2.1.0"
+    id("maven-publish")
+    id("signing")
+    id("org.jetbrains.dokka") version "2.0.0"
+    id("org.jetbrains.dokka-javadoc") version "2.0.0"
+    id("com.gradleup.nmcp") version "0.0.9"
+}
+
+repositories {
+    mavenCentral()
+}
+
+sourceSets {
+    val java by creating {
+        java {
+            srcDirs("lib/java", "build/generated/java")
+        }
+        resources {
+            srcDirs("build/generated/resources")
+        }
+
+        compileClasspath += sourceSets["main"].compileClasspath
+        runtimeClasspath += sourceSets["main"].runtimeClasspath
+    }
+
+    val kotlin by creating {
+        kotlin {
+            srcDirs("lib/kotlin", "build/generated/kotlin")
+        }
+        resources {
+            srcDirs("build/generated/resources")
+        }
+
+        compileClasspath += sourceSets["main"].compileClasspath
+        runtimeClasspath += sourceSets["main"].runtimeClasspath
+    }
+}
+
+
+dependencies {
+    implementation("net.java.dev.jna:jna:5.17.0")
+    "kotlinImplementation"("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.10.2")
+}
+
+
+tasks {
+    val generateJavaJar by creating(Jar::class) {
+        archiveBaseName.set("zen_engine")
+        from(sourceSets["java"].output)
+        dependsOn(sourceSets["java"].classesTaskName)
+    }
+
+    val generateJavaSourcesJar by creating(Jar::class) {
+        archiveBaseName.set("zen_engine")
+        archiveClassifier.set("sources")
+        from(sourceSets["java"].allJava)
+    }
+
+    val generateKotlinJar by creating(Jar::class) {
+        archiveBaseName.set("zen_engine_kotlin")
+        from(sourceSets["kotlin"].output)
+        dependsOn(sourceSets["kotlin"].classesTaskName)
+    }
+
+    val generateKotlinSourcesJar by creating(Jar::class) {
+        archiveBaseName.set("zen_engine_kotlin")
+        archiveClassifier.set("sources")
+        from(sourceSets["kotlin"].kotlin)
+    }
+
+    val dokkaJavadocJava by creating(DokkaTask::class) {
+        outputDirectory.set(layout.buildDirectory.dir("dokka/java"))
+        dokkaSourceSets { named("java") }
+
+    }
+
+    val dokkaJavadocKotlin by creating(DokkaTask::class) {
+        outputDirectory.set(layout.buildDirectory.dir("dokka/kotlin"))
+        dokkaSourceSets { named("kotlin") }
+    }
+
+    val javadocJarJava by creating(Jar::class) {
+        dependsOn(dokkaGeneratePublicationJavadoc)
+        archiveBaseName.set("zen_engine")
+        archiveClassifier.set("javadoc")
+
+        from(dokkaGeneratePublicationJavadoc.get())
+    }
+
+    val javadocJarKotlin by creating(Jar::class) {
+        dependsOn(dokkaGeneratePublicationJavadoc)
+        archiveBaseName.set("zen_engine_kotlin")
+        archiveClassifier.set("javadoc")
+
+        from(dokkaGeneratePublicationJavadoc.get())
+    }
+}
+
+publishing {
+    publications {
+        create<MavenPublication>("mavenJava") {
+            groupId = "io.gorules"
+            artifactId = "zen-engine"
+            artifact(tasks["generateJavaJar"])
+            artifact(tasks["generateJavaSourcesJar"])
+            artifact(tasks["javadocJarJava"])
+
+            configurePom {
+                dependency("net.java.dev.jna:jna:5.17.0")
+            }
+        }
+
+        create<MavenPublication>("mavenKotlin") {
+            groupId = "io.gorules"
+            artifactId = "zen-engine-kotlin"
+            artifact(tasks["generateKotlinJar"])
+            artifact(tasks["generateKotlinSourcesJar"])
+            artifact(tasks["javadocJarKotlin"])
+
+            configurePom {
+                dependency("net.java.dev.jna:jna:5.17.0")
+            }
+        }
+    }
+    repositories {
+        mavenLocal()
+    }
+}
+
+signing {
+    val signingKeyBase64 = providers.environmentVariable("GPG_SIGNING_KEY")
+    val signingPassphrase = providers.environmentVariable("GPG_SIGNING_PASSPHRASE")
+
+    if (signingKeyBase64.isPresent and signingPassphrase.isPresent) {
+        val signingKey = Base64.getDecoder().decode(signingKeyBase64.get()).toString(Charsets.UTF_8)
+
+        useInMemoryPgpKeys(signingKey, signingPassphrase.get())
+        sign(publishing.publications["mavenJava"], publishing.publications["mavenKotlin"])
+    }
+}
+
+nmcp {
+    publishAllPublications {
+        publicationType = "USER_MANAGED"
+
+        val remoteUsername = providers.environmentVariable("SONATYPE_USERNAME")
+        val remotePassword = providers.environmentVariable("SONATYPE_PASSWORD")
+
+        if (remoteUsername.isPresent && remotePassword.isPresent) {
+            username.set(remoteUsername.get())
+            password.set(remotePassword.get())
+        }
+    }
+}
+
+fun loadCargoVersion(): String {
+    val cargoFile = file("${projectDir}/Cargo.toml")
+    val result = Toml.parse(cargoFile.toPath())
+    return result.getTable("package")?.getString("version")
+        ?: throw GradleException("Version not found in Cargo.toml")
+}
+
+fun MavenPublication.configurePom(dependencyConfig: PomDependencyBuilder.() -> Unit) {
+    val depBuilder = PomDependencyBuilder()
+    depBuilder.dependencyConfig()
+
+    pom {
+        name = "GoRules ZEN Engine"
+        description = "GoRules ZEN Engine is a cross-platform, Open-Source Business Rules Engine (BRE)"
+        url = "https://gorules.io"
+
+        licenses {
+            license {
+                name = "MIT License"
+                url = "https://github.com/gorules/zen/blob/master/LICENSE"
+            }
+        }
+
+        developers {
+            developer {
+                id = "gorules"
+                name = "GoRules Team"
+                email = "hi@gorules.io"
+            }
+            organization {
+                name = "GoRules"
+                url = "https://gorules.io"
+            }
+        }
+
+        scm {
+            url = "https://github.com/gorules/zen"
+        }
+
+        withXml {
+            val dependenciesNode = asNode().appendNode("dependencies")
+            depBuilder.addToXml(dependenciesNode)
+        }
+    }
+}
+
+class PomDependencyBuilder {
+    private val dependencies = mutableListOf<Triple<String, String, String>>()
+
+    fun dependency(notation: String) {
+        val parts = notation.split(":")
+        require(parts.size == 3) { "Dependency notation must be 'group:artifact:version'" }
+        dependencies.add(Triple(parts[0], parts[1], parts[2]))
+    }
+
+    fun addToXml(dependenciesNode: groovy.util.Node) {
+        dependencies.forEach { (groupId, artifactId, version) ->
+            val dependencyNode = dependenciesNode.appendNode("dependency")
+            dependencyNode.appendNode("groupId", groupId)
+            dependencyNode.appendNode("artifactId", artifactId)
+            dependencyNode.appendNode("version", version)
+            dependencyNode.appendNode("scope", "runtime")
+        }
+    }
+}
\ No newline at end of file
diff --git a/bindings/uniffi/gradle.properties b/bindings/uniffi/gradle.properties
new file mode 100644
index 00000000..66c172fb
--- /dev/null
+++ b/bindings/uniffi/gradle.properties
@@ -0,0 +1,2 @@
+org.jetbrains.dokka.experimental.gradle.pluginMode=V2Enabled
+org.jetbrains.dokka.experimental.gradle.pluginMode.noWarn=true
\ No newline at end of file
diff --git a/bindings/uniffi/gradle/wrapper/gradle-wrapper.jar b/bindings/uniffi/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 00000000..a4b76b95
Binary files /dev/null and b/bindings/uniffi/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/bindings/uniffi/gradle/wrapper/gradle-wrapper.properties b/bindings/uniffi/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 00000000..9355b415
--- /dev/null
+++ b/bindings/uniffi/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.10-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/bindings/uniffi/gradlew b/bindings/uniffi/gradlew
new file mode 100755
index 00000000..f5feea6d
--- /dev/null
+++ b/bindings/uniffi/gradlew
@@ -0,0 +1,252 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s
+' "$PWD" ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/bindings/uniffi/gradlew.bat b/bindings/uniffi/gradlew.bat
new file mode 100644
index 00000000..9b42019c
--- /dev/null
+++ b/bindings/uniffi/gradlew.bat
@@ -0,0 +1,94 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo. 1>&2
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
+echo. 1>&2
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
+echo location of your Java installation. 1>&2
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/bindings/uniffi/lib/java/io/gorules/zen_engine/JsonBuffer.java b/bindings/uniffi/lib/java/io/gorules/zen_engine/JsonBuffer.java
new file mode 100644
index 00000000..c4570c72
--- /dev/null
+++ b/bindings/uniffi/lib/java/io/gorules/zen_engine/JsonBuffer.java
@@ -0,0 +1,17 @@
+package io.gorules.zen_engine;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.nio.charset.StandardCharsets;
+
+public record JsonBuffer(byte[] value) {
+    public JsonBuffer(String value) {
+        this(value.getBytes(StandardCharsets.UTF_8));
+    }
+
+    @NotNull
+    @Override
+    public String toString() {
+        return new String(value, StandardCharsets.UTF_8);
+    }
+}
\ No newline at end of file
diff --git a/bindings/uniffi/lib/kotlin/io/gorules/zen_engine/kotlin/JsonBuffer.kt b/bindings/uniffi/lib/kotlin/io/gorules/zen_engine/kotlin/JsonBuffer.kt
new file mode 100644
index 00000000..2c2fa3e9
--- /dev/null
+++ b/bindings/uniffi/lib/kotlin/io/gorules/zen_engine/kotlin/JsonBuffer.kt
@@ -0,0 +1,9 @@
+package io.gorules.zen_engine.kotlin
+
+@JvmInline
+value class JsonBuffer(val value: ByteArray) {
+    constructor(json: String) : this(json.toByteArray(Charsets.UTF_8))
+
+    override fun toString(): String = value.toString(Charsets.UTF_8)
+    fun toByteArray(): ByteArray = value
+}
\ No newline at end of file
diff --git a/bindings/uniffi/settings.gradle.kts b/bindings/uniffi/settings.gradle.kts
new file mode 100644
index 00000000..874dd844
--- /dev/null
+++ b/bindings/uniffi/settings.gradle.kts
@@ -0,0 +1 @@
+rootProject.name = "zen-engine"
\ No newline at end of file
diff --git a/bindings/uniffi/src/config.rs b/bindings/uniffi/src/config.rs
new file mode 100644
index 00000000..b87b251f
--- /dev/null
+++ b/bindings/uniffi/src/config.rs
@@ -0,0 +1,14 @@
+use std::sync::atomic::Ordering;
+use zen_engine::ZEN_CONFIG;
+
+#[derive(uniffi::Record)]
+pub struct ZenConfig {
+    pub nodes_in_context: Option<bool>,
+}
+
+#[uniffi::export]
+pub fn override_config(config: ZenConfig) {
+    if let Some(val) = config.nodes_in_context {
+        ZEN_CONFIG.nodes_in_context.store(val, Ordering::Relaxed)
+    }
+}
diff --git a/bindings/uniffi/src/custom_node.rs b/bindings/uniffi/src/custom_node.rs
new file mode 100644
index 00000000..6f402e7c
--- /dev/null
+++ b/bindings/uniffi/src/custom_node.rs
@@ -0,0 +1,56 @@
+use crate::error::ZenError;
+use crate::types::{DecisionNode, ZenEngineHandlerRequest, ZenEngineHandlerResponse};
+use serde_json::Value;
+use uniffi::deps::anyhow::anyhow;
+use zen_engine::handler::custom_node_adapter::{CustomNodeAdapter, CustomNodeRequest};
+use zen_engine::handler::node::{NodeResponse, NodeResult};
+use zen_expression::Variable;
+
+#[uniffi::export(callback_interface)]
+#[async_trait::async_trait]
+pub trait ZenCustomNodeCallback: Send + Sync {
+    async fn handle(
+        &self,
+        key: ZenEngineHandlerRequest,
+    ) -> Result<ZenEngineHandlerResponse, ZenError>;
+}
+
+pub struct NoopCustomNodeCallback;
+
+#[async_trait::async_trait]
+impl ZenCustomNodeCallback for NoopCustomNodeCallback {
+    async fn handle(
+        &self,
+        _: ZenEngineHandlerRequest,
+    ) -> Result<ZenEngineHandlerResponse, ZenError> {
+        Err(ZenError::Zero)
+    }
+}
+
+pub struct ZenCustomNodeCallbackWrapper(pub Box<dyn ZenCustomNodeCallback>);
+
+impl CustomNodeAdapter for ZenCustomNodeCallbackWrapper {
+    async fn handle(&self, request: CustomNodeRequest) -> NodeResult {
+        let input = request
+            .input
+            .try_into()
+            .map_err(|err: ZenError| anyhow!(err))?;
+
+        let node = DecisionNode::from(request.node);
+
+        let result = self
+            .0
+            .handle(ZenEngineHandlerRequest { input, node })
+            .await
+            .map_err(|err| anyhow!(err.details()))?;
+
+        let output: Variable = result
+            .output
+            .try_into()
+            .map_err(|err: ZenError| anyhow!(err))?;
+
+        let trace_data: Option<Value> = result.trace_data.and_then(|trace| trace.try_into().ok());
+
+        Ok(NodeResponse { output, trace_data })
+    }
+}
diff --git a/bindings/uniffi/src/decision.rs b/bindings/uniffi/src/decision.rs
new file mode 100644
index 00000000..b94cb937
--- /dev/null
+++ b/bindings/uniffi/src/decision.rs
@@ -0,0 +1,72 @@
+use crate::custom_node::ZenCustomNodeCallbackWrapper;
+use crate::engine::ZenEvaluateOptions;
+use crate::error::ZenError;
+use crate::loader::ZenDecisionLoaderCallbackWrapper;
+use crate::types::{JsonBuffer, ZenEngineResponse};
+use serde_json::Value;
+use std::sync::Arc;
+use tokio::runtime::Handle;
+use tokio::task;
+use zen_engine::{Decision, EvaluationOptions};
+
+#[derive(uniffi::Object)]
+pub struct ZenDecision {
+    decision: Arc<Decision<ZenDecisionLoaderCallbackWrapper, ZenCustomNodeCallbackWrapper>>,
+}
+
+impl From<Decision<ZenDecisionLoaderCallbackWrapper, ZenCustomNodeCallbackWrapper>>
+    for ZenDecision
+{
+    fn from(
+        value: Decision<ZenDecisionLoaderCallbackWrapper, ZenCustomNodeCallbackWrapper>,
+    ) -> Self {
+        Self {
+            decision: Arc::new(value),
+        }
+    }
+}
+
+#[uniffi::export(async_runtime = "tokio")]
+impl ZenDecision {
+    pub async fn evaluate(
+        &self,
+        context: JsonBuffer,
+        options: Option<ZenEvaluateOptions>,
+    ) -> Result<ZenEngineResponse, ZenError> {
+        let options = options.unwrap_or_default();
+        let context: Value = context.try_into()?;
+
+        let decision = self.decision.clone();
+        let evaluation_options = EvaluationOptions {
+            max_depth: options.max_depth,
+            trace: options.trace,
+        };
+
+        // Use spawn_blocking to run the non-Send code synchronously
+        let response = task::spawn_blocking(move || {
+            // The blocking code that uses non-Send types
+            Handle::current().block_on(async move {
+                decision
+                    .evaluate_with_opts(context.into(), evaluation_options)
+                    .await
+                    .map(|response| ZenEngineResponse::try_from(response))
+                    .map_err(|err| {
+                        ZenError::EvaluationError(
+                            serde_json::to_string(&err.as_ref())
+                                .unwrap_or_else(|_| err.to_string()),
+                        )
+                    })
+            })
+        })
+        .await
+        .map_err(|e| ZenError::EvaluationError(format!("Task failed: {:?}", e)))???;
+
+        Ok(response)
+    }
+
+    pub fn validate(&self) -> Result<(), ZenError> {
+        self.decision.validate().map_err(|e| {
+            ZenError::ValidationError(serde_json::to_string(&e).unwrap_or_else(|_| e.to_string()))
+        })
+    }
+}
diff --git a/bindings/uniffi/src/engine.rs b/bindings/uniffi/src/engine.rs
new file mode 100644
index 00000000..df796fed
--- /dev/null
+++ b/bindings/uniffi/src/engine.rs
@@ -0,0 +1,122 @@
+use crate::custom_node::{
+    NoopCustomNodeCallback, ZenCustomNodeCallback, ZenCustomNodeCallbackWrapper,
+};
+use crate::decision::ZenDecision;
+use crate::error::ZenError;
+use crate::loader::{
+    NoopDecisionLoader, ZenDecisionLoaderCallback, ZenDecisionLoaderCallbackWrapper,
+};
+use crate::types::{JsonBuffer, ZenEngineResponse};
+use serde_json::Value;
+use std::sync::Arc;
+use tokio::runtime::Handle;
+use tokio::task;
+use zen_engine::{DecisionEngine, EvaluationOptions};
+
+#[derive(uniffi::Object)]
+pub(crate) struct ZenEngine {
+    engine: Arc<DecisionEngine<ZenDecisionLoaderCallbackWrapper, ZenCustomNodeCallbackWrapper>>,
+}
+
+#[derive(uniffi::Record)]
+pub struct ZenEvaluateOptions {
+    pub max_depth: Option<u8>,
+    pub trace: Option<bool>,
+}
+
+impl Default for ZenEvaluateOptions {
+    fn default() -> Self {
+        Self {
+            max_depth: Some(5),
+            trace: Some(false),
+        }
+    }
+}
+
+#[uniffi::export(async_runtime = "tokio")]
+impl ZenEngine {
+    #[uniffi::constructor]
+    pub fn new(
+        loader: Option<Box<dyn ZenDecisionLoaderCallback>>,
+        custom_node: Option<Box<dyn ZenCustomNodeCallback>>,
+    ) -> Self {
+        Self {
+            engine: Arc::new(DecisionEngine::new(
+                Arc::new(ZenDecisionLoaderCallbackWrapper(
+                    loader.unwrap_or_else(|| Box::new(NoopDecisionLoader)),
+                )),
+                Arc::new(ZenCustomNodeCallbackWrapper(
+                    custom_node.unwrap_or_else(|| Box::new(NoopCustomNodeCallback)),
+                )),
+            )),
+        }
+    }
+
+    pub async fn evaluate(
+        &self,
+        key: String,
+        context: JsonBuffer,
+        options: Option<ZenEvaluateOptions>,
+    ) -> Result<ZenEngineResponse, ZenError> {
+        let options = options.unwrap_or_default();
+        let context: Value = context.try_into()?;
+
+        let engine = self.engine.clone();
+        let evaluation_options = EvaluationOptions {
+            max_depth: options.max_depth,
+            trace: options.trace,
+        };
+
+        // Use spawn_blocking to run the non-Send code synchronously
+        let response = task::spawn_blocking(move || {
+            // The blocking code that uses non-Send types
+            Handle::current().block_on(async move {
+                engine
+                    .evaluate_with_opts(key, context.into(), evaluation_options)
+                    .await
+                    .map(|response| ZenEngineResponse::try_from(response))
+                    .map_err(|err| {
+                        ZenError::EvaluationError(
+                            serde_json::to_string(&err.as_ref())
+                                .unwrap_or_else(|_| err.to_string()),
+                        )
+                    })
+            })
+        })
+        .await
+        .map_err(|e| ZenError::EvaluationError(format!("Task failed: {:?}", e)))???;
+
+        Ok(response)
+    }
+
+    pub fn create_decision(&self, content: JsonBuffer) -> Result<ZenDecision, ZenError> {
+        let decision = self.engine.create_decision(Arc::new(
+            serde_json::from_slice(&content.0).map_err(|_| ZenError::JsonDeserializationFailed)?,
+        ));
+
+        Ok(ZenDecision::from(decision))
+    }
+
+    pub async fn get_decision(&self, key: String) -> Result<ZenDecision, ZenError> {
+        let engine = self.engine.clone();
+
+        // Use spawn_blocking to run the non-Send code synchronously
+        let decision = task::spawn_blocking(move || {
+            // The blocking code that uses non-Send types
+            Handle::current().block_on(async move {
+                engine
+                    .get_decision(&key)
+                    .await
+                    .map_err(|e| ZenError::LoaderInternalError {
+                        key,
+                        details: e.to_string(),
+                    })
+                    .map(ZenDecision::from)
+            })
+        })
+        .await
+        .map_err(|e| ZenError::EvaluationError(format!("Task failed: {:?}", e)))??;
+
+        Ok(decision)
+    }
+}
diff --git a/bindings/uniffi/src/error.rs b/bindings/uniffi/src/error.rs
new file mode 100644
index 00000000..3a9c28eb
--- /dev/null
+++ b/bindings/uniffi/src/error.rs
@@ -0,0 +1,63 @@
+use serde_json::json;
+use std::fmt::Formatter;
+use zen_expression::IsolateError;
+
+#[allow(dead_code)]
+#[derive(Debug, uniffi::Error)]
+pub enum ZenError {
+    Zero,
+
+    InvalidArgument,
+    StringNullError,
+    StringUtf8Error,
+    JsonSerializationFailed,
+    JsonDeserializationFailed,
+    ExecutionTaskSpawnError,
+
+    IsolateError(String),
+    EvaluationError(String),
+    ValidationError(String),
+
+    LoaderKeyNotFound { key: String },
+    LoaderInternalError { key: String, details: String },
+
+    TemplateEngineError { template: String, details: String },
+}
+
+impl ZenError {
+    pub fn details(&self) -> String {
+        match &self {
+            ZenError::IsolateError(error) => error.to_string(),
+            ZenError::EvaluationError(error) => error.to_string(),
+            ZenError::ValidationError(error) => error.to_string(),
+            ZenError::LoaderKeyNotFound { key } => json!({ "key": key }).to_string(),
+            ZenError::LoaderInternalError { key, details } => {
+                json!({ "key": key, "details": details }).to_string()
+            }
+            ZenError::TemplateEngineError { template, details } => {
+                json!({ "template": template, "details": details }).to_string()
+            }
+            ZenError::Zero => String::from("Zero"),
+            ZenError::InvalidArgument => String::from("InvalidArgument"),
+            ZenError::StringNullError => String::from("StringNullError"),
+            ZenError::StringUtf8Error => String::from("StringUtf8Error"),
+            ZenError::JsonSerializationFailed => String::from("JsonSerializationFailed"),
+            ZenError::JsonDeserializationFailed => String::from("JsonDeserializationFailed"),
+            ZenError::ExecutionTaskSpawnError => String::from("ExecutionTaskSpawnError"),
+        }
+    }
+}
+
+impl std::fmt::Display for ZenError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        self.details().fmt(f)
+    }
+}
+
+impl From<IsolateError> for ZenError {
+    fn from(error: IsolateError) -> Self {
+        ZenError::EvaluationError(
+            serde_json::to_string(&error).unwrap_or_else(|_| error.to_string()),
+        )
+    }
+}
diff --git a/bindings/uniffi/src/expression.rs b/bindings/uniffi/src/expression.rs
new file mode 100644
index 00000000..76cf930a
--- /dev/null
+++ b/bindings/uniffi/src/expression.rs
@@ -0,0 +1,75 @@
+use crate::error::ZenError;
+use crate::types::JsonBuffer;
+use zen_expression::expression::{Standard, Unary};
+use zen_expression::{Expression, Variable};
+
+#[uniffi::export]
+pub fn evaluate_expression(
+    expression: String,
+    context: Option<JsonBuffer>,
+) -> Result<JsonBuffer, ZenError> {
+    let ctx: Variable = context
+        .map(Variable::try_from)
+        .transpose()?
+        .unwrap_or(Variable::Null);
+
+    zen_expression::evaluate_expression(expression.as_str(), ctx).map(JsonBuffer::try_from)?
+}
+
+#[allow(dead_code)]
+#[uniffi::export]
+pub fn evaluate_unary_expression(
+    expression: String,
+    context: JsonBuffer,
+) -> Result<bool, ZenError> {
+    let ctx: Variable = context.try_into()?;
+
+    Ok(zen_expression::evaluate_unary_expression(
+        expression.as_str(),
+        ctx,
+    )?)
+}
+
+#[derive(uniffi::Object)]
+pub(crate) struct ZenExpression {
+    expression: Expression<Standard>,
+}
+
+#[uniffi::export]
+impl ZenExpression {
+    #[uniffi::constructor]
+    pub fn compile(expression: String) -> Result<Self, ZenError> {
+        zen_expression::compile_expression(expression.as_str())
+            .map_err(|err| ZenError::IsolateError(err.to_string()))
+            .map(|expression| Self { expression })
+    }
+
+    pub fn evaluate(&self, context: Option<JsonBuffer>) -> Result<JsonBuffer, ZenError> {
+        let ctx: Variable = context
+            .map(Variable::try_from)
+            .transpose()?
+            .unwrap_or(Variable::Null);
+
+        self.expression.evaluate(ctx).map(JsonBuffer::try_from)?
+    }
+}
+
+#[derive(uniffi::Object)]
+pub(crate) struct ZenExpressionUnary {
+    expression: Expression<Unary>,
+}
+
+#[uniffi::export]
+impl ZenExpressionUnary {
+    #[uniffi::constructor]
+    pub fn compile(expression: String) -> Result<Self, ZenError> {
+        zen_expression::compile_unary_expression(expression.as_str())
+            .map_err(|err| ZenError::IsolateError(err.to_string()))
+            .map(|expression| Self { expression })
+    }
+
+    pub fn evaluate(&self, context: JsonBuffer) -> Result<bool, ZenError> {
+        let ctx: Variable = context.try_into()?;
+        Ok(self.expression.evaluate(ctx)?)
+    }
+}
diff --git a/bindings/uniffi/src/lib.rs b/bindings/uniffi/src/lib.rs
new file mode 100644
index 00000000..9eb2e646
--- /dev/null
+++ b/bindings/uniffi/src/lib.rs
@@ -0,0 +1,9 @@
+uniffi::setup_scaffolding!();
+mod config;
+mod custom_node;
+mod decision;
+mod engine;
+mod error;
+mod expression;
+mod loader;
+mod types;
diff --git a/bindings/uniffi/src/loader.rs b/bindings/uniffi/src/loader.rs
new file mode 100644
index 00000000..e21b2e07
--- /dev/null
+++ b/bindings/uniffi/src/loader.rs
@@ -0,0 +1,54 @@
+use crate::error::ZenError;
+use crate::types::JsonBuffer;
+use std::future::Future;
+use std::sync::Arc;
+use uniffi::deps::anyhow::anyhow;
+use zen_engine::loader::{DecisionLoader, LoaderError, LoaderResponse};
+use zen_engine::model::DecisionContent;
+
+#[uniffi::export(callback_interface)]
+#[async_trait::async_trait]
+pub trait ZenDecisionLoaderCallback: Send + Sync {
+    async fn load(&self, key: String) -> Result<Option<JsonBuffer>, ZenError>;
+}
+
+pub struct NoopDecisionLoader;
+
+#[async_trait::async_trait]
+impl ZenDecisionLoaderCallback for NoopDecisionLoader {
+    async fn load(&self, _: String) -> Result<Option<JsonBuffer>, ZenError> {
+        Err(ZenError::Zero)
+    }
+}
+
+pub struct ZenDecisionLoaderCallbackWrapper(pub Box<dyn ZenDecisionLoaderCallback>);
+
+impl DecisionLoader for ZenDecisionLoaderCallbackWrapper {
+    fn load<'a>(&'a self, key: &'a str) -> impl Future<Output = LoaderResponse> + 'a {
+        async move {
+            let maybe_json_buffer = match self.0.load(key.into()).await {
+                Ok(r) => r,
+                Err(error) => {
+                    return Err(Box::new(LoaderError::Internal {
+                        key: key.to_string(),
+                        source: anyhow!(error),
+                    }));
+                }
+            };
+
+            let Some(json_buffer) = maybe_json_buffer else {
+                return Err(Box::new(LoaderError::NotFound(key.to_string())));
+            };
+
+            let decision_content: DecisionContent =
+                serde_json::from_slice(json_buffer.0.as_slice()).map_err(|e| {
+                    LoaderError::Internal {
+                        key: key.to_string(),
+                        source: anyhow!(e),
+                    }
+                })?;
+
+            Ok(Arc::new(decision_content))
+        }
+    }
+}
diff --git a/bindings/uniffi/src/types.rs b/bindings/uniffi/src/types.rs
new file mode 100644
index 00000000..ba2ccd21
--- /dev/null
+++ b/bindings/uniffi/src/types.rs
@@ -0,0 +1,129 @@
+use crate::error::ZenError;
+use serde_json::Value;
+use std::collections::HashMap;
+use zen_engine::handler::custom_node_adapter::CustomDecisionNode;
+use zen_engine::{DecisionGraphResponse, DecisionGraphTrace};
+use zen_expression::Variable;
+
+pub struct JsonBuffer(pub Vec<u8>);
+uniffi::custom_newtype!(JsonBuffer, Vec<u8>);
+
+impl TryFrom<JsonBuffer> for Value {
+    type Error = ZenError;
+
+    fn try_from(value: JsonBuffer) -> Result<Self, Self::Error> {
+        serde_json::from_slice(&value.0).map_err(|_| ZenError::JsonDeserializationFailed)
+    }
+}
+
+impl TryFrom<JsonBuffer> for Variable {
+    type Error = ZenError;
+
+    fn try_from(value: JsonBuffer) -> Result<Self, Self::Error> {
+        serde_json::from_slice(&value.0).map_err(|_| ZenError::JsonDeserializationFailed)
+    }
+}
+
+impl TryFrom<Value> for JsonBuffer {
+    type Error = ZenError;
+
+    fn try_from(value: Value) -> Result<Self, Self::Error> {
+        serde_json::to_vec(&value)
+            .map(|v| JsonBuffer(v))
+            .map_err(|_| ZenError::JsonSerializationFailed)
+    }
+}
+
+impl TryFrom<Variable> for JsonBuffer {
+    type Error = ZenError;
+
+    fn try_from(var: Variable) -> Result<Self, Self::Error> {
+        serde_json::to_vec(&var)
+            .map(|v| JsonBuffer(v))
+            .map_err(|_| ZenError::JsonSerializationFailed)
+    }
+}
+
+#[derive(uniffi::Record)]
+pub struct ZenEngineTrace {
+    pub id: String,
+    pub name: String,
+    pub input: JsonBuffer,
+    pub output: JsonBuffer,
+    pub performance: Option<String>,
+    pub trace_data: Option<JsonBuffer>,
+    pub order: u32,
+}
+
+impl TryFrom<DecisionGraphTrace> for ZenEngineTrace {
+    type Error = ZenError;
+
+    fn try_from(value: DecisionGraphTrace) -> Result<Self, Self::Error> {
+        Ok(Self {
+            id: value.id,
+            name: value.name,
+            input: JsonBuffer::try_from(value.input)?,
+            output: JsonBuffer::try_from(value.output)?,
+            performance: value.performance,
+            trace_data: value.trace_data.map(JsonBuffer::try_from).transpose()?,
+            order: value.order,
+        })
+    }
+}
+
+#[derive(uniffi::Record)]
+pub struct ZenEngineResponse {
+    pub performance: String,
+    pub result: JsonBuffer,
+    pub trace: Option<HashMap<String, ZenEngineTrace>>,
+}
+
+impl TryFrom<DecisionGraphResponse> for ZenEngineResponse {
+    type Error = ZenError;
+
+    fn try_from(value: DecisionGraphResponse) -> Result<Self, Self::Error> {
+        Ok(Self {
+            performance: value.performance,
+            result: JsonBuffer::try_from(value.result)?,
+            trace: value
+                .trace
+                .map(|opt| {
+                    opt.into_iter()
+                        .map(|(key, value)| Ok((key, ZenEngineTrace::try_from(value)?)))
+                        .collect::<Result<_, ZenError>>()
+                })
+                .transpose()?,
+        })
+    }
+}
+
+#[derive(uniffi::Record)]
+pub struct ZenEngineHandlerResponse {
+    pub output: JsonBuffer,
+    pub trace_data: Option<JsonBuffer>,
+}
+
+#[derive(uniffi::Record)]
+pub struct DecisionNode {
+    pub id: String,
+    pub name: String,
+    pub kind: String,
+    pub config: JsonBuffer,
+}
+
+impl From<CustomDecisionNode> for DecisionNode {
+    fn from(value: CustomDecisionNode) -> Self {
+        Self {
+            id: value.id,
+            name: value.name,
+            kind: value.kind,
+            config: JsonBuffer(serde_json::to_vec(&value.config).unwrap()),
+        }
+    }
+}
+
+#[derive(uniffi::Record)]
+pub struct ZenEngineHandlerRequest {
+    pub input: JsonBuffer,
+    pub node: DecisionNode,
+}
diff --git a/bindings/uniffi/uniffi-bindgen.rs b/bindings/uniffi/uniffi-bindgen.rs
new file mode 100644
index 00000000..f6cff6cf
--- /dev/null
+++ b/bindings/uniffi/uniffi-bindgen.rs
@@ -0,0 +1,3 @@
+fn main() {
+    uniffi::uniffi_bindgen_main()
+}
diff --git a/bindings/uniffi/uniffi.toml b/bindings/uniffi/uniffi.toml
new file mode 100644
index 00000000..ed2a9997
--- /dev/null
+++ b/bindings/uniffi/uniffi.toml
@@ -0,0 +1,26 @@
+# Kotlin
+[bindings.kotlin]
+package_name = "io.gorules.zen_engine.kotlin"
+generate_immutable_records = true
+
+[bindings.kotlin.custom_types.JsonBuffer]
+into_custom = "JsonBuffer({})"
+from_custom = "{}.value"
+
+# Java
+[bindings.java]
+package_name = 'io.gorules.zen_engine'
+generate_immutable_records = true
+
+[bindings.java.custom_types.JsonBuffer]
+into_custom = "{}"
+from_custom = "{}"
+
+# C#
+[bindings.csharp]
+namespace = "GoRules.ZenEngine"
+cdylib_name = "Libs/zen_uniffi"
+
+[bindings.csharp.custom_types.JsonBuffer]
+into_custom = "new JsonBuffer({})"
+from_custom = "{}.Value"
\ No newline at end of file