KELVINNGUYEN
10+ years building scalable systems & cloud infrastructure. Deep focus on AWS architecture, modern JS/TS stacks, and enterprise AI — RAG pipelines, AI Chatbots, LLM-backed services. Based in Da Nang, Vietnam 🇻🇳
Skills & Technologies
Work Experience
- Leading architecture of enterprise AI products: RAG pipelines & AI Chatbot systems using LangChain, OpenAI, pgvector.
- Owning AWS cloud infrastructure (ECS, Lambda, RDS Aurora, S3, SQS, API Gateway) for scalable microservices.
- Building high-performance FastAPI & NestJS services — REST APIs, WebSocket, GraphQL interfaces.
- Mentoring team; enforcing TypeScript standards, CI/CD (GitHub Actions), system design best practices.
- Led architecture design for frontend-backend integration, scalability, and security of a local social media platform serving 100k+ active users on AWS (ECS, RDS Aurora, S3, CloudFront, SQS).
- Mentored and grew a team of 6 junior–mid developers, conducting code reviews, 1-on-1s, and defining team coding standards and TypeScript best practices.
- Collaborated with product managers and designers to align technical decisions with business goals, ensuring on-time delivery across multiple product sprints.
- Defined and drove the technology roadmap: evaluated and adopted Next.js on Vercel edge + Supabase realtime — improving page load by 60%.
- Enforced CI/CD pipelines (GitHub Actions → Docker → AWS ECS) and introduced CloudWatch observability dashboards, cutting incident response time significantly.
- Facilitated cross-team collaboration between backend, DevOps, and QA; proactively identified project risks and implemented solutions to prevent delivery delays.
- Led 8–12 engineers; architected AWS environments (EC2, RDS, S3, Route53) with 99.9% uptime SLAs for Japanese clients.
- Delivered blockchain platforms — DApp, smart contracts, NFT — and managed the full DevOps lifecycle.
- Shipped 15+ projects: social platforms, streaming apps, fintech wallets, IoT drone management systems.
Built web apps with PHP (Laravel), React.js & Node.js on AWS EC2; integrated third-party services for Japanese enterprise clients.
Designed ERDs, built RESTful APIs for mobile apps, delivered admin dashboards end-to-end for SME clients.
Key Projects
Enterprise customer-support chatbot with document-grounded RAG. End-to-end: doc ingestion → chunking → OpenAI Embeddings → pgvector → GPT-4. 10k+ daily queries, 40% support ticket reduction.
Local social media platform. AWS (ECS, RDS, S3, CloudFront, SQS) for 100k+ users, Supabase realtime, Next.js on Vercel edge.
GameFi platform — token staking, NFT marketplace, PvP. 50k+ concurrent users at peak. DApp with Web3.js + Google Cloud backend.
Smartphone trading platform with wallet & blockchain escrow. Led 20+ engineers; AWS architecture for high-traffic marketplace.
Unmanned Traffic Management for drone fleets. Real-time monitoring via Socket.io + Google Maps; flight plan module.
Online doctor consultation & prescription platform. AWS ECS containerized; HIPAA-aligned for Japanese market.
About & Contact
Senior Fullstack Engineer with 10+ years building production-grade web apps, cloud-native architectures, and AI-powered systems.
Deep expertise in AWS cloud — from serverless Lambda to containerized ECS clusters, managed RDS, and event-driven SQS/SNS architectures.
In the AI space, I design RAG pipelines, AI Chatbots, and LLM-integrated enterprise products using LangChain, OpenAI, and vector databases.