AI/ML Intern — DataFactZ Solutions Pvt. Ltd. (Document RAG Q&A + address extraction)
Built and evaluated a document-based RAG Q&A system that performs deterministic document address extraction plus LLM-assisted normalization and retrieval. Tracked retrieval and refusal-quality metrics including Recall@4, MRR, and refusal rate using an automated evaluation scorecard. Integrated outputs into production-grade FastAPI services for API consumption. • Created a document pipeline (upload → extract → normalize → dedup → embed → retrieve → rerank → ask) • Implemented CrossEncoder reranking with a refusal-threshold guardrail and query rewriting • Designed evaluation runs for Recall@4, MRR, and refusal rate reporting • Delivered results through FastAPI endpoints and supporting test automation (pytest)