Senior Product Engineer - Open Source End-to-End Builder

US Health Partners, LLC; New York (NY); Remote; USD 120,000 - 190,000; Full time

Benefits offered by this job

Flexible work environment - remote

Healthcare

Equity in the company

Time off

A USD$500 Home office setup

Global Gatherings

Job summary

Langfuse is seeking product engineers to own features end-to-end, from user research to shipping code and docs. You’ll work across the stack, including React frontend, Next.js backend, and ClickHouse analytics, gaining exposure to cutting-edge LLM applications.

You’ll engage with users, design API surfaces, and write public docs. This role values initiative, open source mindset, and the ability to ship visible results in a small, accountable team.

Qualifications

• Built features or entire products end-to-end.
• Experience shipping user-facing products, ideally in TypeScript/React and with exposure to data-intensive backends.
• Able to manage projects independently and develop strong conviction about what to build and how to ship.
• Taste for great developer experience: API design, UI details, and clear documentation.
• Interest in open source software and talking to developers about their problems.

Responsibilities

• Own features end-to-end, from user talks to shipping code and docs.
• Work across the full stack: React frontend, Next.js backend, ClickHouse analytics, Python/TypeScript SDKs.
• Talk to users regularly via calls and community channels; route support requests.
• Write public documentation for owned features and ship publicly during Launch Weeks.
• Collaborate in a small, accountable team where output is visible and impactful.

Skills

End-to-end features

TypeScript/React

Data-heavy backends

Project management

Developer experience

Education

CS or quantitative degree

Tools

ClickHouse

Analytics databases

Data visualization

Job description

Langfuse is seeking product engineers to own features end-to-end, from user research to shipping code and docs. You’ll work across the stack, including React frontend, Next.js backend, and ClickHouse analytics, gaining exposure to cutting-edge LLM applications.

You’ll engage with users, design API surfaces, and write public docs. This role values initiative, open source mindset, and the ability to ship visible results in a small, accountable team.