Pew Putthividhya
LLM Post-training / Agentic AI @Google Deepmind
- Role
- Senior Staff Software Engineer (Gdm Genai) at Google DeepMind
- Location
- Mountain View, CA, US
- LinkedIn followers
- 500 followers
About Pew Putthividhya
Tech Lead Manager / Senior Staff Software Engineer with expertise in LLM post training, SFT / Reinforcement Learning, Retrieval Augmentation Generation (RAG), Research Agent / Agentic AI; Deep Learning models for Search / Retrieval / Ranking / Recommendation / NLU / NLP / NLG. Programming Languages: C++, PythonTensorFlow, Jax.
Experience
Senior Staff Software Engineer (Gdm Genai)
Aug 2025 — Present · Mountain View, CA, US
Agentic AI / RAG: Developed a multi-step reasoning agent that leverages search, browse tools to enhance its parametric knowledge for Search AI Mode. Off-policy distillation to smaller serving models based on Best-of-N trajectories, rubrics-based trajectory scoring.Off-Policy RL: RL training recipe improvement by improving demonstration, leveraging critique rationales from factuality autoraters to rewrite the trajectories (with the same policy model). The new training recipe showed improved training efficiency and significantly reduced factuality losses.
Education
Massachusetts Institute of Technology
B. Sc., M. Eng., Electrical Engineering and Computer Science
Phillips Exeter Academy
High School Diploma
UC San Diego
PhD, Machine Learning and Statistical Modeling
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