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LangfuseLA

Senior Frontend Engineer

Langfuse is an open-source LLM engineering platform that helps teams collaboratively develop, monitor, evaluate, and debug AI applications.

Langfuse

Employee count: 11-50

FR, DE + 2 more

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We're looking for a senior frontend engineer to build the UI for the most widely adopted open source LLM engineering platform where the core challenge is rendering massive, data-intensive views fast and making complex workflows feel simple.

Requirements

  • Strong in React, TypeScript, and modern CSS
  • Likes to collaborate with a designer to turn complex requirements into intuitive interfaces
  • Someone who can PM and project-manage themselves
  • Interest in open source software and genuine enjoyment talking to users about their experience
  • Thrives in a small, accountable team where your output is visible and matters

Benefits

  • Flexible remote work policy
  • Opportunity to work on a high-impact project
  • Opportunity to learn and grow with a small, experienced team
  • Regular feedback and support from the team
  • Continuous learning journey in the AI space

About the job

Apply before

Posted on

Job type

Full Time

Experience level

Senior

Location requirements

Hiring timezones

Germany +/- 0 hours, and 3 other timezones

About Langfuse

Learn more about Langfuse and their company culture.

View company profile

Through groundbreaking technology, we are revolutionizing LLM engineering at Langfuse. As an open-source platform, we empower teams to collaboratively develop, monitor, evaluate, and debug AI applications with unprecedented precision. Our comprehensive suite of tools includes observability, prompt management, and advanced analytics, enabling developers to trace complex execution flows and optimize model performance. By providing deep insights into cost, latency, and quality, we help organizations build production-grade AI systems that are both reliable and scalable.

Founded in 2022 and headquartered in Berlin, Germany, Langfuse has rapidly become a critical component of the modern AI stack. Our platform integrates seamlessly with leading frameworks such as LangChain, LlamaIndex, and OpenAI, offering a flexible and robust solution for diverse engineering needs. In a significant milestone for our growth and technological advancement, Langfuse was acquired by ClickHouse in January 2026. This strategic union combines our expertise in LLM observability with ClickHouse's powerful data analytics capabilities, allowing us to deliver even faster and more scalable solutions to our global community of developers.

Employee benefits

Learn about the employee benefits and perks provided at Langfuse.

View benefits

Expense Autonomy

Freedom to expense necessary work items without bureaucratic hurdles.

Late Night Meals

Dinner is covered by the company for employees who choose to work late.

Equity Program

Significant equity compensation with a generous 10-year exercise window.

Company Retreats

Annual one-week company retreat to a beautiful location for the entire team.

View Langfuse's employee benefits
Claim this profileLangfuse logoLA

Langfuse

Company size

11-50 employees

Founded in

2022

Chief executive officer

Marc Klingen

Employees live in

View company profile

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