Software Engineer Agent Harness
Letta is a San Francisco AI company building persistent, stateful agents that learn from experience through memory, identity, and evolving capabilities.
Funding history
About Letta
Letta develops and operates an AI agent platform, including Letta Agent and open-source Letta Code, for building, deploying, and using stateful agents across local and cloud environments.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will develop the open-source agent framework and cloud service. You will design scalable, resilient backend services and APIs, and support researchers working on advanced agent architectures.
Requirements
- Python
- Service architecture for security, reliability, and performance
- Scalable backend service development
- SQL databases
- Postgres
- AI-stack tooling
- Inference engines
- vLLM
- Ollama
- LLM provider APIs
- OpenAI
- Anthropic
- TypeScript
- React
- Tailwind
Responsibilities
- Develop the open-source agents framework and cloud service
- Design scalable and resilient backend services and APIs for Letta Cloud
- Support researchers working on advanced agent architectures
Hiring Process
Initial screen (30 min) → technical screen (1–1.5 hours) → paid in-person work trial (2 days onsite in San Francisco).