Product Engineer

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We\’re looking for an experienced product engineer to ship category defining LLM engineering products.

About Langfuse

• We are building the fastest growing open-source LLM engineering platform.
• We help engineers and enterprises build and run LLM applications at scale.
• We\’ve raised $4m from Y Combinator, Lightspeed and General Catalyst.
• Thousands of teams and engineers use Langfuse daily. Thousands are joining every month.
• We\’re a small, focused team working in-person from Berlin, Germany.

What You\’ll Do

• Do whatever it takes to build new features for our users. For this you are not afraid to touch FE, BE, SDKs or Docs
• You love to communicate with users on a call or in one of our hundreds of slack channels
• You will come up with a plan on how to build the next big feature at Langfuse and execute on it
• Doing support
• Writing docs

Tech Stack

• Frontend and Backend in Typescript (including Express, NextJs, Tailwind, Prisma, tRPC)
• Clickhouse, Postgres, Redis, S3
• Client facing SDKs in Python and Typescript
• You should be familiar with a majority of these but we trust that you can pick up a new language/framework quickly.

What We\’re Looking For

• Someone who is able to PM and project manage themselves
• Experience building highly reliable, scaling infrastructure
• Interest in open source software and talking to users
• Hard worker who thrives in a small, accountable team
• CS or quantitative degree preferred
• Impressive achievements (professional or otherwise)

Bonus Points

• Former founder
• Experience in SDK design
• DX, ML/AI background

Why Langfuse?

• Building for very sophisticated technical users
• Competitive salary & equity compensation
• Strong customer & revenue growth
• You are still joining really early
• Strong in person engineering culture (Berlin-Mitte)
• Extreme autonomy
• Performance and learning focused culture
• Everyone on the team says: \’best place I\’ve ever worked at\‘
• 2 short scheduled meetings per week

Langfuse is an equal opportunities employer and welcomes applications from all qualified candidates.