(Senior) Frontend Engineer

Methodfi; Berlin; Vor Ort; EUR 60.000 - 80.000; Vollzeit

Zusammenfassung

A fast-growing engineering company in Berlin is hiring a Frontend Engineer to develop scalable user interfaces for their LLM platform. The ideal candidate has over 3 years of experience in frontend development, strong knowledge of React and TypeScript, and thrives in small, accountable teams. You will lead projects that improve application architecture, build dashboards, and implement advanced search and filtering capabilities. This role offers competitive compensation in a performance-focused culture.

Leistungen

Competitive salary

Equity

Learning-focused culture

Qualifikationen

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

Aufgaben

• Come up with an improved architecture for our frontend application.
• Build self-serve dashboards to generate insights into billions of LLM executions.
• Implement advanced filtering and search interfaces for complex datasets.

Kenntnisse

React

Frontend and Backend in Typescript

State management

Data fetching patterns

Ausbildung

CS/quantitative degree

Tools

NextJs

Express

Tailwind

Prisma

tRPC

Jobbeschreibung

About Langfuse

• Open Source LLM Engineering Platform that helps teams build useful AI applications via tracing, evaluation, and prompt management (mission, product)

• We have the chance to build the "Datadog" of this category; model capabilities continue to improve but building useful applications is really hard, both in startups and enterprises

• Largest open source solution in this category: >2k customers, >14M monthly SDK downloads, >6M docker pulls

• We raised money from world class investors (Y-Combinator, Lightspeed, General Catalyst) and are default alive by making more money than we spend

• We're a small, engineering-heavy, and experienced team in Berlin and San Francisco (how we work)

About the Role

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

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. See full stack here.

• 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