(Senior) Design Engineer

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