5-7 years of experience in product engineering or software development
Proven ability to build features or products from scratch
Strong experience with TypeScript and React, particularly in user-facing applications
Ability to manage projects independently and develop product conviction
Passion for developer experience, including API design and documentation
Interest in open source software and engaging with developer communities
Preferred degree in Computer Science or a quantitative field
Responsibilities
Own features from concept to launch, including user research and documentation
Work across the full technology stack, including frontend and backend technologies
Engage with users through calls and community channels to gather feedback
Write public documentation for the features you develop
Participate in Launch Weeks by presenting new features to the community
Benefits
Flexible work environment with remote options
Employer contributions towards healthcare
Equity in the company through stock options
Flexible time off policies
USD$500 for home office setup for remote employees
Opportunities for global gatherings and team offsites
Full Job Description
Why Product Engineering at Langfuse
Your work will have an outsized impact.
Everything you build is open source (MIT-licensed) and immediately visible. Langfuse has 35,000+ GitHub stars and our SDKs are downloaded more than a hundred million 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.
You will grow at Langfuse by
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. To give you a sense: recent features a single engineer owned include the Langfuse for Agents release (new trace views, agent graphs, semantic span labels), the TypeScript SDK v4 rewrite on OpenTelemetry, and managing dashboards via API/CLI/MCP.
Work across the full stack: and we mean full. Our surface area is wide: React frontend, Next.js backend, ClickHouse analytics, Python and TypeScript SDKs, public docs, Terraform modules, and more. You'll touch whatever the feature needs. One week you might be writing a new ClickHouse query for cost analytics, the next you're designing an SDK API, the next you're building a new rust worker for faster data processing.
Talk to users constantly: jump on calls, respond in community channels, and route support requests. At Langfuse, support is how we build conviction about what to build next. Our handbook says it best: support by engineers is a core value proposition.
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. Engineers present the features they built to the community.
What we're looking for
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
Bonus points:
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
No candidate checks all boxes. If you feel you are a good fit for this role, please go ahead and apply.
Perks
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.
