
Amazon
◦ Lead a team of scientists and MLEs to built RAG-based brand detection system for query understanding with LLM-finetuning and achieve 400M+ annualized revenue gain and reduce over 80% operation cost with pipeline simplication. ◦ Architected and delivered a novel Agentic Search \& Personalization Framework pioneering 4B-parameter models fine-tuning through SFT and DPO to outperform Claude Sonnet 4.5 and defined the team's evaluation roadmap and set new standards for productionizing high-performance small language models. ◦ Spearheaded the technical architecture of a Multi-Modal LLM Indexing Service, driving a paradigm shift in search product discovery and scaling to process millions of products with \$600M+ annual revenue gain. ◦ Engineered a Multi-Modal Retrieval System by designing an LLM-driven synthetic data pipeline to train semantic matching models, enabling robust hybrid image-text search capabilities.




