Langfuse is building the leading open-source LLM engineering platform (Why Langfuse?).

While LLMs improve a lot, we don’t see enough applications in production. Building these applications requires a new workflow of continuous monitoring and evaluation that we enable with Langfuse. We are seeing strong traction over recent months (see metrics below), thus it is the right time to grow the team to build out our backend systems, product, and how we communicate with developers.

We are hiring across for engineering and technical go-to-market roles. We work in-person in Berlin, Germany & are building an excellent, small team. If you are considering new opportunities — even if you might not be looking immediately, we would love to hear from you & get coffee.

We have raised a $4M seed round from Lightspeed, General Catalyst, Y Combinator and angels. We are growing fast (see metrics below) and work with some of the best AI teams such as Samsara, Twilio, KhanAcademy and Rocket Money.

Team

• Clemens Rawert, @rawert, Linkedin
• Marc Klingen, @marcklingen, GitHub, Linkedin
• Marlies Mayerhofer, @marliessophie, GitHub, LinkedIn
• Max Deichmann, @maxdeichmann, GitHub, Linkedin
• Hassieb Pakzad, @hassiebpakzad, GitHub, LinkedIn
• Steffen Schmitz, GitHub, LinkedIn
• Jannik Maierhöfer, @JMaierhoefer, GitHub, LinkedIn

A few tidbits that might help you understand what kind of company we are:

• We have 2 scheduled meetings per week: 15 min planning on Monday, 60 min demo on Friday
• We are a very high-trust environment, Reed Hastings’ ‘No Rules Rules’ inspires our culture, here’s a summary
• Most team members have led teams before and are excited about being an IC again to ship more
• We were heavily influenced by our time at Y Combinator and follow its ethos. We’re a Silicon Valley Startup in Berlin - more here

PS: We are based in Berlin (Germany) and work in person. Come join us build one of the most exciting open source devtool companies in Europe!

Roles

• Design Engineer
  • Berlin, €70K - €130K EUR, 0.1% - 0.35%
  • You are a design-minded frontend engineer who is passionate about building beautiful, functional, and user-friendly interfaces. You own UI/UX in the Langfuse application to help our users achieve their goals and create how thousands of teams build their LLM applications.
• Backend Engineer
  • Berlin, €70K - €130K EUR, 0.1% - 0.35%
  • You will work on our backend systems, powering the core infrastructure of Langfuse. You work on a data-intensive application that is used by hundreds of companies and thousands of developers ingesting hundreds of millions of events.
  • The technical blog post on the v3 release is a great example of what you could have worked on.
• Product Engineer
  • Berlin, €70K - €130K EUR, 0.1% - 0.35%
  • Design, scope, ship, and launch new full-stack (UI, backend, SDKs, integrations) features on top of our existing data platform. You’ll own what you build truly end-to-end from first conversations with users to operating it in production.
  • See launch weeks (#1, #2) and changelog for a good selection of things you could have worked on.
• Developer Advocate
  • Berlin, €70K - €130K EUR, 0.1% - 0.35%
  • Run our bottom-up go-to-market via developer-focused content, documentation, partnerships, events, and community-building. Langfuse is a platform of many building blocks and there are lots of common workflows we can educate on to drive awareness and adoption.
  • Examples: Hugging Face and Posthog partnerships, LLM Security Monitoring guides/examples, AWS partnership, our YouTube channel
• Founding GTM Engineer
  • Berlin, €70K - €130K EUR, 0.1% - 0.35%
  • Work closely with our enterprise customers throughout the inbound sales cycle. Help them resolve complex technical questions, succeed in POCs, and expand after initial adoption.
  • Build ressources and improve the process to further increase scalability of our GTM.

Please apply via Work At a Startup or send us an email with your CV/LinkedIn to [email protected]

You need to be located in Berlin, Germany or willing to relocate. The first few interviews can be done remotely via Zoom. In the final stage, we will work one day onsite together (usually on an actual high-priority project).

Why Join Langfuse?

Impactful work/product for awesome OSS community and users. We get to work with extremely smart users in our OSS community who share a ton of great feedback, and it feels great to help them build exciting products. You’ll also get to work with many large enterprises and YC companies who monitor and improve their LLM products with Langfuse. Community channels: GitHub Discussions, GitHub Issues, Discord, recordings of community town halls

Strong in-person engineering culture. Almost everyone on the team works on the product; our go-to-market (also Enterprise) is exclusively inbound, and we enjoy building a developer tool together with our open-source community.

Interesting challenges. Building an open source developer tool with a strong observability component is engineering-wise highly interesting due the various integrations and SDKs, the chance to design the best LLM Engineering workflows for these teams, and the necessity to scale our backend-logic and infrastructure.

Growth & Ownership. We believe that a product like ours is best built by a small group of excellent engineers who fully own the components that they build. This includes running them in production, product feedback and roadmap planning, and design. We are a small team that’s moving fast (changelog) with a focus on great developer experience.

Shared curiosity and interest. If you are interested in working with engineering teams who rethink what’s possible when using LLMs to power new use cases, come work with us as we all share this excitement and get to see the leading edge of what great teams build every day. Next to shipping quickly this is the most fun part for sure.

Public Metrics

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