Bui Duc Tri

Backend / Fullstack Developer

• Direct Client & Partner Collaboration: Acted as a technical point of contact alongside the Tech Lead within a 7-member squad — working directly with clients and partner engineering teams (VitaDairy, UrBox, MoMo Payment Gateway, Salesforce CRM) to clarify business workflows, align API contracts & webhook schemas, and resolve integration issues during UAT and production rollout.
• Loyalty, Coin Accumulation & Lucky Draw Services: Developed and maintained backend microservices (NestJS, Java Spring Boot 3, Apache Kafka) for enterprise loyalty and gamification campaigns — handling user coin accumulation, lucky draw turns, affiliate tracking events, MoMo reward transfers, and Salesforce member data synchronization.
• Reward Redemption & Data Consistency: Implemented safe point deduction, gift quota tracking, and automated fallback backup-voucher issuance using the Transactional Outbox pattern, idempotency keys, and Redis distributed locks (cache-aside), ensuring data consistency across multi-tenant PostgreSQL databases and preventing race conditions during peak campaign traffic.
• Production Planning MVP – Solo Delivery & Direct Client Feedback (SNY VINA): Worked directly with client stakeholders (gathering requirements, demonstrating MVP iterations, and incorporating live factory feedback) to independently build and deploy a production planning web app (Next.js 14, Prisma 5.22, PostgreSQL on Neon, Vercel) via an AI-assisted workflow — replacing 4 manual Excel files across 40 weaving machines with 2-step transactional Excel imports (Preview & Confirm), PostgreSQL table-level locking, and optimistic concurrency control (409 Conflict).
• Agentic AI Workflow & MCP Automation: Orchestrated Claude Code and Codex agents using custom Rules & Skills integrated with Context7 MCP (for grounded, up-to-date documentation to prevent code hallucinations) and Playwright MCP (for automated E2E browser testing), accelerating boilerplate generation, Flyway SQL migrations, and feature delivery by ~30%.

Fullstack Developer

• Fullstack Web Development & Asset Optimization: Built and maintained a candidate registration platform using Next.js, React, and Node.js (consolidating 100% of candidate onboarding data into a centralized system) and optimized the image processing/upload pipeline to reduce server payload and data transfer load by 45%.
• Containerization & Quality Assurance: Streamlined Docker multi-stage builds to cut container image size by 20%, and wrote unit/integration tests using Jest, React Testing Library, and MSW to achieve 90% test coverage with zero regression on core onboarding flows.

Backend Developer (Freelance)

• Financial SaaS Backend (FIORA): Designed and built core backend services and RESTful APIs using Node.js, PostgreSQL, and Prisma ORM; structured relational schemas, query optimizations, and composite indexes to ensure financial ledger integrity.
• Cloud Deployment & Security: Deployed containerized services via AWS Copilot, configured Redis caching layers, and integrated secure Firebase token-based authentication.

Backend Developer

• API Performance & Latency Optimization: Implemented Redis cache-aside strategies and indexed high-frequency queried columns, cutting average API response latency by 45% under 500+ concurrent requests.
• Message Queue Reliability & CI/CD: Refactored asynchronous email and notification pipelines using BullMQ with exponential backoff retry and Dead Letter Queues (DLQ), reducing job failure rates from ~15% to under 1.5%; built and maintained automated CI/CD pipelines with Docker multi-stage builds.