Langfuse

(Senior) Design Engineer

Langfuse Berlin

Stellenbeschreibung:

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 we 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 hiring a design engineer (design-minded front-end engineer) to help us elevate our user’s experience.

What you'll do

  • Own UX and interfaces at Langfuse
  • Collaborate closely with our product engineers
  • Make our data-dense application easy to use
  • Make Langfuse the best developer focused UI out there
  • Simplify complex user flows
  • Create reusable, consistent UI elements

Past projects

You might have worked on:

  • Redesign our filters for our table components to allow users to apply filters with ease
  • Implement data heavy and complex setups for features like prompt experiments

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 front-end / full-stack engineering and a penchant for design
  • Take ownership of our frontend and UI/UX made for developers
  • You want to talk to users
  • Hard worker and thrive working in a small and accountable team
  • Good understanding of best in class UI/UX
  • Excited about open source software

Bonus

  • 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

#J-18808-Ljbffr
NOTE / HINWEIS:
EnglishEN: Please refer to Fuchsjobs for the source of your application
DeutschDE: Bitte erwähne Fuchsjobs, als Quelle Deiner Bewerbung

Stelleninformationen

  • Veröffentlichungsdatum:

    21 Dez 2025
  • Standort:

    Berlin
  • Typ:

    Vollzeit
  • Arbeitsmodell:

    Vor Ort
  • Kategorie:

  • Erfahrung:

    2+ years
  • Arbeitsverhältnis:

    Angestellt

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