Research Engineer / Scientist, Post-Training

We're building self-improving artificial intelligence at Letta, creating agents that continually learn from experience and adapt over time. We're assembling a world-class team of researchers and engineers to solve AI's hardest problem: making machines that can reason, remember, and learn the way humans do.

Requirements

• Proficiency in python and deep learning frameworks eg. PyTorch
• Expertise in post-training techniques e.g. SFT fine-tuning, reinforcement learning, reward models, preference learning
• Ability to balance execution speed with empirical rigor
• Proven track record of impactful research (breakthrough publications and/or open-source contributions)
• Real-world impact beyond pure academic work

Benefits

• Competitive salary
• Equity in the company
• Opportunity to work on a cutting-edge AI project
• Collaborative and dynamic work environment