(Senior) Product Engineer

About Langfuse

• Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management (mission, product)

• We have the chance to build the "Datadog" of this category; model capabilities continue to improve but building useful applications is really hard, both in startups and enterprises

• Largest open source solution in this category: >2k customers, >14M monthly SDK downloads, >6M docker pulls

• We raised money from world class investors (Y-Combinator, Lightspeed, General Catalyst) and are default alive by making more money than we spend

• We're a small, engineering-heavy, and experienced team in Berlin and San Francisco (how we work)

About the Role

In Short: We're looking for an experienced product engineer to help us scale our platform as we grow.

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

You should be familiar with a majority of these but we trust that you can