Senior Product Engineer

Role Description

Your work will have an outsized impact. Everything you build is open source (MIT-licensed) and immediately visible. Langfuse has 21,900+ GitHub stars and our SDKs are downloaded 23M+ times per month. When you ship a new feature the community notices in GitHub issues, on X, and in our community channels.

Product engineers at Langfuse are the people who deliver new features end-to-end to our users. You own the product thinking from understanding the user problem to deciding what to build to shipping the solution.

You will also have direct exposure to how cutting-edge LLM applications are built. The users you serve are some of the best and most ambitious software engineers leveraging Langfuse to improve their applications. Deeply understanding the problems they solve will help you design the best possible product and along the way makes you an expert on LLM engineering yourself.

• Own features end-to-end: from talking to users, to writing the spec, to shipping the code and docs, to writing the changelog post with your name on it.
• Work across the full stack: React frontend, Next.js backend, ClickHouse analytics, Python and TypeScript SDKs, public docs, Terraform modules, and more.
• Talk to users constantly: jump on calls, respond in community channels, and route support requests.
• Write public documentation about the features you own. At Langfuse, docs are product.
• Ship publicly during Launch Weeks: we've run four Launch Weeks so far, dropping a new feature every day for a week.

Qualifications

• Someone who has built features or even entire products from scratch end-to-end.
• Experience building and shipping user-facing products end-to-end, ideally in TypeScript/React and with exposure to data-intensive backends.
• Someone who can manage projects themselves. You know how to develop strong conviction about what to build and how to ship it.
• Taste for great developer experience: you care about API design, UI details, and clear documentation.
• Interest in open source software and genuine excitement about talking to developers about their problems.
• Thrives in a small, accountable team where your output is visible and matters.
• CS or quantitative degree preferred.

Requirements

• Bonus points for experience with ClickHouse, analytics databases, or building complex data visualizations.
• Former founder or early startup experience.
• Contributions to popular open source projects.
• ML/AI background or familiarity with the LLM framework ecosystem.

Benefits

• Flexible work environment: ClickHouse is a globally distributed company and remote-friendly. We currently operate in over 25 countries.
• Healthcare: Employer contributions towards your healthcare.
• Equity in the company: Every new team member who joins our company receives stock options.
• Time off: Flexible time off in the US, generous entitlement in other countries.
• A USD$500 Home office setup if you’re a remote employee.
• Global Gatherings: We believe in the power of in-person connection and offer opportunities to engage with colleagues at company-wide offsites.
• Culture - We All Shape It: As part of a rapidly scaling start-up, you will be instrumental in shaping our culture.