Jobs backed by Cristobal Valenzuela

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Letta is a San Francisco AI company building persistent, stateful agents that learn from experience through memory, identity, and evolving capabilities.

Funding

Felicis Ventures Sunflower Capital Barry McCardel Clem Delangue Cristobal Valenzuela Essence VC Jeff Dean Jordan Tigani Robert Nishihara Tristan Handy

Investors

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Agent Framework Continual Learning Experiment Hypothesis Llm Long-Horizon Task Machine Learning Open Source Prompt Optimization Publication Research System Prompt

Research Engineer Scientist Post Training

Letta·1 hour ago

1 hour agoSan Francisco Office Onsite Full Time Research Jobs by Letta

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Letta is a San Francisco AI company building persistent, stateful agents that learn from experience through memory, identity, and evolving capabilities.

Funding

Felicis Ventures Sunflower Capital Barry McCardel Clem Delangue Cristobal Valenzuela Essence VC Jeff Dean Jordan Tigani Robert Nishihara Tristan Handy

Investors

View all 15 skills

Agent Context Management Deep Learning Evaluation Fine-Tuning Open Source Post-Training Preference Learning Python Pytorch Reinforcement Learning Research Reward Model Synthetic Data Tool Use

Research Engineer Scientist Memory

Letta·1 hour ago

1 hour agoSan Francisco Office Onsite Full Time Research Jobs by Letta

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Letta is a San Francisco AI company building persistent, stateful agents that learn from experience through memory, identity, and evolving capabilities.

Funding

Felicis Ventures Sunflower Capital Barry McCardel Clem Delangue Cristobal Valenzuela Essence VC Jeff Dean Jordan Tigani Robert Nishihara Tristan Handy

Investors

View all 14 skills

Architecture Context Management Episodic Memory Evaluation Llm Memory Multi-Agent Collaboration Open Source Procedural Skill Publication Research Retrieval Semantic Knowledge Temporal Sequence

Software Engineer Agent Harness

Letta·1 hour ago

1 hour agoSan Francisco Office Onsite Full Time Backend Jobs by Letta

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Letta is a San Francisco AI company building persistent, stateful agents that learn from experience through memory, identity, and evolving capabilities.

Funding

Felicis Ventures Sunflower Capital Barry McCardel Clem Delangue Cristobal Valenzuela Essence VC Jeff Dean Jordan Tigani Robert Nishihara Tristan Handy

Investors

View all 15 skills

Anthropic Api Backend Ollama Openai Performance Postgres Python React Reliability Security Sql Tailwind Typescript Vllm