(Senior) Frontend Engineer

Langfuse; Berlin; Vor Ort; EUR 65.000 - 85.000; Vollzeit

Zusammenfassung

A fast-growing LLM engineering platform in Berlin is looking for a Frontend Engineer to build performant user interfaces. The ideal candidate has over 3 years of experience, mastery of React and TypeScript, and a passion for open-source software. This role offers equity, competitive salary, and a culture focused on performance and learning.

Leistungen

Competitive salary

Equity

Learning-focused culture

Qualifikationen

• 3+ years of experience in frontend development.
• Experience in building highly performant front-ends.
• Strong understanding of React and modern frontend tooling.

Aufgaben

• Build performant, scalable user interfaces.
• Implement advanced filtering and search interfaces.
• Create self-serve dashboards for user insights.

Kenntnisse

Frontend development experience

React

TypeScript

Usability focus

Ausbildung

CS/quantitative degree

Tools

Express

NextJs

Tailwind

Prisma

tRPC

Jobbeschreibung

Frontend Engineer

In short: We\'re hiring a Frontend Engineer to build performant, scalable user interfaces for our rapidly growing LLM engineering platform.

About Langfuse

• We are building the fastest growing open-source LLM engineering platform.

• We help engineers and enterprises build and run LLM applications at scale.

• We\'ve raised $4m from Y Combinator, Lightspeed and General Catalyst.

• Thousands of teams and engineers use Langfuse daily.

• Thousands are joining every month.

• We\'re a small, focused team working from Berlin, Germany.

What you\'ll do

Past projects you would have led:

• Come up with an improved architecture for our frontend application.

• Build self-serve dashboards to generate insights into billions of LLM executions of our users.

• Creating performant table components with a focus on usability and fast rendering times.

• Implementing advanced filtering and search interfaces for complex datasets.

Tech Stack

You should be familiar with a majority of these but we trust that you can pick up a new language/framework quickly.

• React

• Frontend and Backend in Typescript (including Express, NextJs, Tailwind, Prisma, tRPC)

What we\'re looking for

• 3+ years of experience in frontend development

• Experience building highly performant front-ends.

• Strong understanding of React, TypeScript, and modern frontend tooling

• Experience with state management and data fetching patterns

• Hard worker and thrive working in a small and accountable team

• Excited about open source software

• A CS/quantitative degree is preferred

Bonus

• Performance optimization and profiling experience

• ML/AI experience

• Impressive achievements from previous careers or side projects

• Previous startup or founding experience

Why Langfuse?

• You are joining really early

• Strong Product Market Fit!

• We are building a very small but highly capable team

• Only hiring Engineering in foreseeable future

• Strong customer & revenue growth

• Building picks and shovels for the hottest AI companies

• Building for very sophisticated technical users

• Competitive salary & equity

• Performance and learning focused culture

• Everyone on the team says: best place I\'ve ever worked at

How we work

• Engineering based in Berlin (we aim for 4-5 days in the office)

• No more than 2 short scheduled meetings per week

• Extreme ownership & autonomy how and what to work on

Hiring Process

We can run this process in less than 7 days.

1. Fill out application

2. We screen your application

3. Jump on a intro call with our CTO

4. Technical Deep Dive interview

5. Super Day (half or full day in Berlin Office)

6. Meet the other founders (short calls)

7. Decision & Offer

Links

• Our codebase: GitHub Repository

• Ben Kuhn on Impact, Agency and Taste

• Who we are & how we work