Research Engineer / Research Scientist - Post Training, Memory

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Research Engineer / Research Scientist on OpenAI's Personalization-Memory team within the Post Training organization. The role focuses on building general-purpose memory and personalization capabilities for frontier models and agentic products, spanning memory architecture, post-training, and long-horizon training and evaluation tasks. Based in San Francisco with a hybrid model of 3 days per week in office.

• Own and pursue a research agenda for improving long-horizon memory and personalization in frontier models
• Build robust evaluations for tracking modeling improvements
• Design, implement, test, and debug code across the research stack
• Collaborate closely with research and product teams to shape technical solutions

• Background in reinforcement learning research
• Ability to iterate quickly and convert scientific rigor into product impact
• Comfort diving into a large ML codebase to debug
• Strong research craftsmanship and principled approaches

• Passion for long-horizon tasks and memory
• Experience with frontier model research
• Track record of turning research into product impact