Moyeen Hussain W.

Full Stack Developer Java React Python AI Integration and RAG Systems

Building an AI powered product? Need a full stack developer who can integrate LLMs, build RAG pipelines, and ship production ready apps, not just prototype them? That is exactly what I do. I am a full stack developer with 8 plus years of experience in Java Spring Boot, React.js, and Python. Over the last few years I have gone deep into AI integration, connecting real applications to LLMs like OpenAI, Gemini, Qwen, Ollama and Claude, building retrieval augmented generation systems, and creating intelligent automation that actually works in production, not just in demos. Here is what I bring to your project: On the full stack side, I build Java Spring Boot and Python backends paired with React or Next.js frontends. Clean architecture, scalable systems, built to grow with your business. I have reduced API response times by 60% and cut cloud costs by 30% for clients just by making smarter architecture decisions. On the AI side, I go well beyond basic API calls. I design complete RAG pipelines with vector search using Pinecone, ChromaDB, and OpenSearch. I handle document ingestion, semantic retrieval, and conversational interfaces that plug directly into your product and feel native, not bolted on. On the infrastructure side, I deploy on AWS with Docker, Kubernetes, and full CI/CD pipelines so your app ships on time and scales without drama. I have logged 3000 plus hours on Upwork with a 100% Job Success Score. Clients describe me as fast, reliable, and someone who finds a way to deliver even on the most unusual requirements. If you need a developer who can own a project from architecture all the way to deployment, I would love to hear about what you are building. Send me a message and I will get back to you within 4 to 8 hours.