Job Details

Solving Self-Improving Superintelligence

The human brain is a sponge. Today's AI brains are brittle and rigid. At Letta, we're building self-improving artificial intelligence: creating agents that continually learn from experience and adapt over time.

Founded by the creators of MemGPT from UC Berkeley's Sky Computing Lab (the birthplace of Spark and Ray). Backed by Jeff Dean, Clem Delangue, and pioneers across AI infrastructure. Our agents already power production systems at companies like 11x and Bilt Rewards, learning and improving every day.

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.

Note that this role is in-person (no hybrid), 5 days a week in downtown San Francisco.

At Letta, we are re-imagining the developer experience for building, deploying, and interacting with advanced AI agents. We believe the true potential of AI can only be reached if developers are given the tools to deeply understand how their agents are working through open AI systems and innovative product design. We are creating a developer experience that prioritizes:

• Transparency: We don't believe in trying to hide the inner workings of agents (unlike closed AI companies) or trying to impose unnecessary abstractions: instead, we focus on providing tools to help developers understand exactly how their agents are interfacing with LLMs (e.g. what exactly is being placed into the LLM context window and why).
• Control: Developers should have granular control of model backends, memory, cross-agent communication, and tools - but getting starting and integrating end applications should be simple and seamless.
• Experience: LLMs are an incredible technology, and working with LLMs should be a joyful and exciting experience. We care deeply about building best-in-class products that are beautifully designed.

As a product engineer, you will help build, design and define how developers will interface with our agent framework through our application surfaces:

• Our Agent Development Environment, a visual interface for designing agents and tools, distributed on the web and desktop on MacOS and Windows.
• Our application SDKs that enable developers to build full-stack agent apps with 5 lines of code.
• Our Cloud Platform, that enables seamless deployment, monitoring and testing of agents in production with zero infrastructure setup.

You will work closely with designers, researchers, and the founders to build the visual interfaces for innovative agent functionality (e.g. multi-agent collaboration, memory, voice, etc.). You will interface closely with customers and Letta's active open source community to understand their agent use-cases and how the developer experience can be improved.

Skills:

• Strong frontend development skills (React)
• Experience with fullstack development, including API design, interacting with DBs (Postgres, Redis), and crafting user experiences
• Proficiency with backend development (Next.js, Node, Typescript, Bonus: Python)
• Excellent communication skills to interface with designers and customers

You are a good fit for this role if:

• You enjoy interacting directly with developers and customers
• You care deeply about developer experience
• You are excited about what AI agents will be able to do
• You love learning about how agents and LLMs work under the hood

Examples of what you might work on:

• Visualizing cross-agent communication for multi-agent groups
• Designing a workflow for versioning agent templates
• Rendering raw input and output tokens for each LLM invocation

Our culture

Signs it could be a great fit:

• You want to maximize your impact: you want work on a small, incredibly talented team where every individual plays a huge role in the team's success. You wonder what it would have been like to be at OpenAI when it was just a dozen people, or Google when it was just a couple of grad students in a garage.
• You're excited to go head-to-head with tech giants, frontier labs, and other startups that are many times our size in both headcount and funding.
• You are fundamentally opposed to closed frontier AI that is controlled by a handful of billionaires and private tech companies.

Signs it's a bad fit:

• You like stability, and get stressed out when there's nobody telling you exactly what to do. We look for people that thrive in ambiguity and can intuit the most important problems by talking to customers and dogfooding our product.
• You want to work a 9-5, and value clear separation of work from life. The stakes are the highest they've ever been, and the only moat is execution velocity. Operating on a strict 9-5 guarantees failure.
• You value titles or want to people-manage. Letta is a flat company where every researcher and engineer is an individual contributor.

Our Interview Process:

• Initial screen (30 min)
• Technical screen (1-1.5 hours)
• Paid in-person work trial (2 days onsite in SF)