Founding Product Engineer

Our background

Letta is a company founded around the MemGPT project (12k GitHub stars). The founding team comes from the same research lab and PhD advisors at Berkeley that produced Spark (→ Databricks) and Ray (→ Anyscale). We have deep expertise in both AI and systems, are currently hiring a founding team of exceptional engineers to join us in building the next generation of LLM agent technology.

Are you ready to apply Make sure you understand all the responsibilities and tasks associated with this role before proceeding.

Your role

Our goal as a company is to empower developers to build state-of-the-art LLM agents to power their own applications. As a Product Engineer , you will :

Lead development of a web platform for developers that are designing, debugging, and deploying LLM agents.

Play a crucial role in building a developer experience around technology that allows agent builders to observe and control agent behavior at a much deeper level, while also working with a design team and LLM researchers.

You should have a fascination with LLM technology, as this role will require interacting closely with LLMs and understanding how to provide the human interfaces that allow developers to push LLMs to their limits.

Your skillset

You’re an ideal candidate for this position if :

You have a deep familiarity with the modern web stack

React is your bread and butter - you’ve been writing React professionally for 3 years

Keywords : React, Typescript, Tailwind, Nx, TanStack, Radix UI, Zod, Zustand

You know how to work with designers

You’ll be working closely with our design team to build the UI / UX

Keyword : Figma

You are fluent in Python and know your way around a REST API server

You’ll also be working closely with the LLM research team to develop new APIs and schemas for agents

Keywords : Python, FastAPI

You’ve built an LLM chatbot frontend before

OpenAI playground, but for Ollama? You could mock that up in a day or two

Token streaming over POST SSE? No problem

You are fascinated by LLM technology

Even if you don’t have a formal background in LLMs, you love keeping up to date with the latest in LLM technology (your laptop is loaded with llama.cpp and 1TB of model weights)

You love learning about how agents and LLMs work under the hood

You love beautiful things (you’ve made them before, and can show us)

And by “things” we mean web apps

And by “beautiful”, we mean it looks like something on @shadcn’s timeline

Portfolio projects (either OSS or live websites) that we can look at are a major plus

Our hiring process

We are hiring a small, tight-knit team of exceptionally talented founding engineers. Every hire matters, so we take the hiring process very seriously.

Initial phone interview (30m video call) : We want to learn more about your background, your skills, your opinions on open source AI, and why you want to work at an early stage AI startup.

Technical take-home (