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Research Engineer / Scientist, Self-Improvement

LettaSan Francisco OfficeTechnical Staff - Research
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Salary
Not listed
Job type
Full-time
Posted
15 Aug 2025
Status
Open · checked 7d ago

About this role

Role Overview

The Research Engineer or Scientist for Self-Improvement position at Letta is a full-time, in-person role based in downtown San Francisco, requiring five days a week on-site. This position is ideal for machine learning experts and researchers who want to build self-improving artificial intelligence and help create agents that continually learn from experience.

Key Responsibilities

Create prompt optimization and system prompt learning methods enabling agents to continuously learn from long-horizon tasks.
Build methods that allow agents to automatically generate and test hypotheses in an environment, or seek out and improve their own weaknesses.
Enhance the efficiency of learning from long-running agentic tasks.
Design and execute experiments to measure self-improvement scalably.
Advance the AI field by publicly sharing research through papers, technical reports, blog posts, and open-source code.

Requirements

Strong expertise in machine learning, focusing specifically on large language models and continual learning.
Familiarity with agent frameworks and prompt optimization techniques.
A proven track record of impactful research, demonstrated through breakthrough publications or open-source contributions.
Ability to balance rapid execution speed with strong empirical rigor.
Experience achieving real-world impact that extends beyond purely academic work.

Skills and Tools

Machine Learning
Large Language Models (LLMs)
Continual Learning
Agent Frameworks
Prompt Optimization
Spark

About the Company

Letta is building self-improving artificial intelligence, creating agents that continually learn and adapt over time. Founded by the creators of MemGPT from UC Berkeley's Sky Computing Lab and backed by prominent industry pioneers, Letta already powers production systems for companies like 11x and Bilt Rewards. The company operates as a flat organization of individual contributors focused on tackling AI's hardest challenges.

How to Apply

To apply for this position, please visit the official Letta careers page and follow the application instructions provided there.

Skills and tech stack

Questions candidates ask

Where is the Research Engineer position located?

The role is strictly in-person, five days a week at the Letta office in downtown San Francisco.

What is the primary focus of the role?

The role focuses on developing methods for AI agents that self-improve after training, including prompt optimization and hypothesis testing.

What qualifications are required for applicants?

Applicants need expertise in machine learning, LLMs, and continual learning, along with familiarity with agent frameworks, prompt optimization, and a track record of impactful research.

Is this a remote or hybrid position?

No, this role is fully in-person with no hybrid options available.

How can I apply for this job?

You can apply by visiting the official Letta careers website.

Ready to apply?

The application is on the official Letta careers page.

Apply on company site