Senior Product Engineer: Open Source LLM Platform

Langfuse; France; Hybride; EUR 70 000 - 100 000; Plein temps

Résumé du poste

Langfuse is hiring product engineers who ship user-facing features end-to-end and own the product thinking from user problem to release. You will work across a full stack—React frontend, Next.js backend, and data-heavy services—while engaging with developers and customers to improve the product.

You should be comfortable owning RFCs, documentation, and public releases, with a strong background in TS/React and experience with data-intensive backends.

Qualifications

• Experience shipping user-facing products end-to-end.
• Strong experience with TypeScript/React.
• Ability to manage projects and own features.
• Interest in open source software.
• Excellent communication with users and teammates.
• CS or quantitative degree preferred.

Responsabilités

• Own features end-to-end from user research to shipping and documenting.
• Collaborate across frontend, backend, and data teams.
• Engage with users through calls, forums, and feedback channels.
• Write public documentation for features you own.
• Contribute to Launch Weeks by shipping visible updates.

Connaissances

TypeScript/React

End-to-end ownership

Data-intensive backends

Project management

Open source mindset

Communication

Formation

CS or quantitative degree

Outils

ClickHouse

PostgreSQL

TypeScript

React

Git

Description du poste

Langfuse is hiring product engineers who ship user-facing features end-to-end and own the product thinking from user problem to release. You will work across a full stack—React frontend, Next.js backend, and data-heavy services—while engaging with developers and customers to improve the product.

You should be comfortable owning RFCs, documentation, and public releases, with a strong background in TS/React and experience with data-intensive backends.