(Senior) Product Engineer

Langfuse; Berlin; Vor Ort; EUR 65.000 - 90.000; Vollzeit

Zusammenfassung

A pioneering technology startup in Berlin is seeking an experienced Product Engineer to scale its platform. You will work on new feature development across frontend, backend, SDKs, and documentation. Ideal candidates should demonstrate strong project management abilities and a passion for open-source software. Competitive salary and equity compensation are offered, along with an emphasis on autonomy within a supportive engineering culture.

Leistungen

Competitive salary & equity compensation

Strong customer & revenue growth

Extreme autonomy

Performance and learning-focused culture

Qualifikationen

• Proven ability to self-manage projects and deadlines.
• Experience in designing scalable systems.
• Passion for engaging with users to understand needs.

Aufgaben

• Develop new features by collaborating with the team.
• Communicate with users effectively over calls and channels.
• Create and execute plans for product development.

Kenntnisse

Project management

Building reliable infrastructure

Open source software interest

Strong communication

Problem-solving

Ausbildung

CS or quantitative degree

Tools

SDK design

Machine Learning

AI frameworks

Jobbeschreibung

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 pick up a new language/framework quickly.

• See full stack here

• Learn about our architecture

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

Process

We can run this process to offer in less than 7 days.

1. Fill out application

2. We screen your application

3. Jump on a intro call with our CTO

4. Technical Deep Dive interview

5. Super Day ( half or full day in Berlin Office )

6. Meet the other founders (short calls)

7. Decision & Offer

Links

• Project you could have built: Infrastructure Evolution Blog Post

• Our codebase: GitHub Repository

• Ben Kuhn on Impact, Agency and Taste

• Who we are & how we work

• What is a Product Engineer (PostHog)