Vu D.
AI & Backend Architect | Java/Spring, Python/FastAPI, Scalable APIs
AI & Backend Architect with 18+ years building scalable systems using Java/Spring Boot, Python/FastAPI, and cloud-native microservices on AWS. I combine strong software engineering fundamentals with AI-assisted development workflows to deliver faster and safer releases. Daily toolkit includes GitHub Copilot, Claude Code, KiloCode, and Codex for code generation, refactoring, test scaffolding, and technical documentation. Key outcomes: - Reduced trade execution latency from 500ms to 100ms for a stock data platform processing 10K events/sec - Built a RAG-based AI research assistant that cut analyst research time by 60% - Led a distributed team of 8 engineers to deliver a loan management system serving 200K+ users - Designed multi-tenant SaaS backend handling 5M+ daily requests with 99.9% uptime Technical stack: Java 17, Spring Boot 3, Python, FastAPI, Golang, Node.js, PostgreSQL, MySQL, Redis, Docker, Kubernetes, AWS, OpenAI API, LangChain. If you need a senior engineer who can own a problem end-to-end, from system design to deployment, let's talk.
Earnings and projects
Last 6 months ÷ 6
Last 6 months: $75
Billed in all: $111,867$112k
$38 in the last 6 months
Across 38 contracts
Earnings, last 30 days
Skill rankings: Top 23% in Spring Framework
Ranked by MRR among everyone on Upwork with the skill.
- #201Spring Framework880 freelancers · 🇻🇳 #10Top 23%🇻🇳#10 of 39
- #269Apache Kafka981 freelancers · 🇻🇳 #10Top 27%🇻🇳#10 of 29
- #523Redis1,774 freelancers · 🇻🇳 #13Top 29%🇻🇳#13 of 37
- #582Spring Boot2,150 freelancers · 🇻🇳 #16Top 27%🇻🇳#16 of 57
- #634Golang2,195 freelancers · 🇻🇳 #23Top 29%🇻🇳#23 of 72
- #1,033Kubernetes3,351 freelancers · 🇻🇳 #23Top 31%🇻🇳#23 of 70
- #1,100LLM Prompt Engineering2,457 freelancers · 🇻🇳 #10Top 45%🇻🇳#10 of 19
- #1,927LangChain3,821 freelancers · 🇻🇳 #12Top 50%🇻🇳#12 of 27