Headline

Data Scientist | GenAI Engineer | Building RAG Pipelines, LLM Evaluation & AI Agents with Python · OpenAI · FAISS · FastAPI | Open to Remote & Contract

About

I build production-grade GenAI systems — RAG pipelines, LLM evaluation frameworks, and AI-powered automation tools — using Python, FastAPI, and the OpenAI API. Over the past 3 years, I've architected end-to-end AI systems that deliver measurable outcomes: a 40% improvement in contextual answer accuracy using FAISS-based vector retrieval, a 35% reduction in LLM hallucinations through systematic prompt tuning, and 85%+ model accuracy on classification pipelines deployed via REST APIs. I specialize in: → RAG architecture (ingestion → embedding → retrieval → generation) → LLM evaluation: accuracy, relevance, hallucination detection → Prompt engineering: zero-shot, few-shot, chain-of-thought → Task trajectory design and multi-step AI workflow automation → Production API development with Python / FastAPI / C# Currently working as a developer and I've shipped 10+ production APIs and maintained large-scale backend data pipelines. My GenAI projects run in parallel — I treat every one as a production system, not a side experiment. Open to: GenAI Engineer · LLM Evaluator/Annotator · AI Engineer · ML Engineer — Remote / Contract / Full-time globally. 📩 sarnobatanil090635@gmail.com

Location

Pune/Pimpri-Chinchwad Area

Work experience

Software Developer | GenAI & Backend at Confidential, Sep 2023 - Present · 2 yrs 10 mos, Remote, • Designed and shipped 10+ production REST APIs in C# and Python (FastAPI), reducing average system response time by 30% through async processing and optimized middleware architecture. • Refactored 15+ complex SQL queries and restructured database schemas, cutting average query execution time by 25% and improving data pipeline throughput for large-scale structured datasets. • Designed and maintained backend data pipelines handling large volumes of structured enterprise data, collaborating within an Agile team to deliver scalable applications on schedule. • Initiated and built a RAG-based AI chatbot using Python, OpenAI API, and FAISS vector search — expanding it into a standalone production-grade system with FastAPI endpoints (see Projects section).

Education

Master's degree, Master of computer applications, Savitribai Phule Pune University

Master of Computer Applications, Software Development and ML Fundamentals, Pimpri Chinchwad Education Trust'S. Pimpri Chinchwad College Of Engineering