Harun Nur R.

AI Backend Engineer specializing in production-grade RAG systems and AI Agents. 5+ AI projects delivered with 100 percent Job Success Score. I’ve worked on AI systems beyond simple demos — building pipelines that are measurable, reliable, and designed for real-world usage. My focus is making AI systems not only work, but also: * produce consistent and grounded outputs * be evaluated with clear metrics (RAGAS, LLM-as-judge) * improve over time through proper testing and feedback loops Experience includes: * AI Agents (tool calling, ReAct patterns, workflow automation) * RAG systems with evaluation pipelines * LLM evaluation (faithfulness, relevance, correctness) * Observability (latency, cost, error tracking, tracing) I approach AI systems like software systems — with versioning, testing, and monitoring in place. Stack: Python, Go, OpenAI, Anthropic, LangChain, LlamaIndex, Pinecone, Qdrant, ChromaDB, RAGAS, LangSmith, FastAPI, Docker Open to fixed-price and long-term collaborations.