Hi, I'm Chris — a developer based in the Pacific Northwest with a background that runs through IT, manufacturing, and the trades. That mix shapes how I build: I care about precision, real-world practicality, and software that actually holds up.

I build web apps, Android apps, and custom tools. Most of what I work on sits at the intersection of structured engineering problems and clean, maintainable code.

A mobile-first bike maintenance tracking web app. Cyclists log every service, track component wear, get maintenance reminders, and carry a complete history through ownership transfers — like a Carfax for bikes.

Key features:

• Google OAuth + email/password auth with SSR cookie sessions
• AI-assisted bike registration — enter year/brand/model, specs auto-populate via Claude API
• Receipt OCR — snap or upload a shop invoice, AI extracts and pre-fills the service record
• Service interval tracking with progress bars, component library, and auto-seeded intervals on bike creation
• Daily reminder emails via Resend + Vercel Cron
• Public QR bike profiles with three privacy tiers
• Photo upload with client-side compression
• Ride logging with aggregate stats
• Full test suite — 41 tests across 11 files, all green

👉 shiftlog.bike

A corkboard-style note canvas app for Android. Pin 6 note types to a large pannable and zoomable canvas across multiple named boards.

Key features:

• Pan/pinch-zoom canvas at 120fps (UI thread, Reanimated 4)
• Sticky notes, index cards, checklists, photos, text bubbles, links
• Note resize, rotation, color themes, snap-to-grid
• Rubber-band multi-select, tack grouping, board templates
• Persistent local storage with schema versioning and migration
• 426 passing tests across 19 suites

👉 github.com/chrisjmendoza/hanna-notes

A local AI software engineering agent that accepts a natural-language task, scans a repository using semantic search, generates a structured plan via LLM, and executes each step through a controlled tool layer.

Key features:

• Multi-LLM support: Anthropic Claude, OpenAI, Ollama, Groq, LM Studio
• File patching, test running, git commits, GitHub PR creation
• Issue watcher daemon — polls GitHub and auto-resolves labeled issues
• Per-repo memory for continuity across sessions
• Dry-run mode, structured task reports, 20+ test files

👉 github.com/chrisjmendoza/Hephaestus

Android app for modeling marine propeller-shaft assemblies with parametric components and real-world machining rules.

Key features:

• Jetpack Compose UI with live dimensioned canvas preview
• Parametric bodies, tapers, liners, threads
• Snap engine, taper calculations, OAL logic
• PDF export and drawing layout engine
• Clean, modular architecture with full unit test coverage

👉 github.com/chrisjmendoza/ShaftSchematic

A Windows backup utility that automatically backs up folders to a USB drive the moment it's plugged in.

Key features:

• Drive identification via sentinel marker file — not fragile drive letters
• WMI USB detection with event storm protection and debounce
• Robocopy-based backup engine with job object process control
• Silent system tray operation with async buffered logging
• Full install/uninstall scripts, scheduled task integration

👉 github.com/chrisjmendoza/portflow

A local-first, AI-powered document management system. Drop in a scanned PDF or image — DocArchivist extracts text via OCR, applies AI-driven metadata, and files everything into a searchable archive.

Key features:

• PDF text extraction with OCR fallback (PyMuPDF + Tesseract)
• AI metadata: title, vendor, date, category, summary
• Multi-provider AI: OpenAI and Anthropic, switchable at runtime
• SQLite FTS5 full-text search across all documents
• React + TypeScript frontend with TanStack Query

• Next.js / React / TypeScript
• Tailwind CSS
• Supabase (Postgres, Auth, Storage)
• REST APIs / Server Actions
• Vercel

• Kotlin / Jetpack Compose / Android SDK
• React Native / Expo
• MVVM architecture · Coroutines · Material 3

• Python / FastAPI
• SQLite / FTS5
• OCR workflows (Tesseract / PyMuPDF)
• PDF processing and automation utilities

• C# / .NET 8 / WinForms
• Git / GitHub

• Production web apps with auth, databases, and AI integration
• Android features, UI builds, and bug fixes (Kotlin + Compose)
• Python tooling, OCR pipelines, and data extraction
• FastAPI backends and automation workflows
• Custom desktop utilities and system tools
• Refactoring legacy codebases into maintainable systems

• Clear communication and honest expectations
• Thoughtful, predictable engineering
• Strong debugging and systems thinking
• High-quality code built to last
• Fast iteration without cutting corners

• Portfolio: chrismendoza-dev.vercel.app
• LinkedIn: linkedin.com/in/chrisjmendoza
• Email: chrisjmendoza@gmail.com