Java Portfolio (Staff/Principal Engineering)

About me

I am Nguyen Khanh (Jeremy) Tran, a Staff-level Java Engineer and Principal Architect with 10+ years of enterprise delivery and 8+ years of technical leadership. I specialize in Java/Spring Boot, distributed systems, and platform modernization with a focus on resiliency, observability, and delivery velocity.

Tech stack

• Java 21, Spring Boot 3.x, Maven (multi-module)
• PostgreSQL, Flyway, RabbitMQ
• Resilience4j, Micrometer, Actuator, Logstash JSON logging
• JUnit 5, Testcontainers
• GitHub Actions CI/CD

Leadership highlights

• Led cross-functional teams building high-throughput, cloud-native platforms.
• Built platform standards that reduced integration time for new services by weeks.
• Established production readiness and operational playbooks aligned to SLOs.
• Recognized for competitive engineering awards in international and national skills competitions.

Featured projects

1) order-service

What this demonstrates

• RESTful design, layered architecture, and transactional consistency
• Postgres + Flyway, OpenAPI, resilience patterns
• Observability-first configuration and Testcontainers integration testing

Screenshot

• Placeholder: add an architecture/service UI screenshot here.

2) async-notifications

What this demonstrates

• Async messaging with RabbitMQ, DLQ, and retry handling
• Producer/consumer separation with documented integration contracts
• Idempotency strategy and operational documentation

Screenshot

• Placeholder: add a message flow diagram screenshot here.

3) devex-kit

What this demonstrates

• Standardized quality gates (Checkstyle, Jacoco, enforcer rules)
• Reusable build templates and governance patterns
• Developer enablement documentation

Screenshot

• Placeholder: add a DevEx standards screenshot here.

How to evaluate this repo (2-minute scan)

1. Skim the root README and the architecture/operational docs in /docs.
2. Open each project README and run the quickstart instructions.
3. Review the Testcontainers integration tests and quality gate command:

   ./mvnw -q -DskipITs=false verify

CI/CD demo (GitHub Actions + Minikube)

This repo includes a GitHub Actions workflow that builds Docker images, boots a Minikube cluster, deploys Kubernetes manifests, and runs a smoke test.

Workflow file:

• .github/workflows/ci-cd.yml

Local demo with Docker Compose

cp .env.example .env
docker compose --env-file .env up --build

Services:

• Order API: http://localhost:8080
• Producer API: http://localhost:8091
• Consumer actuator: http://localhost:8092/actuator/health
• RabbitMQ UI: http://localhost:15672 (guest/guest)

Contact

• Email: nguyenkhanh.tran.95@gmail.com
• LinkedIn: https://linkedin.com/in/jeremytranmiu
• GitHub: https://github.com/KhanhTN2/