# Applied Research Engineer, Evaluation at Black Forest Labs

- Company: Black Forest Labs
- Status: Open
- Workplace: On-site
- Location: Freiburg (Germany) · Zurich
- Level: Mid-level
- Discipline: AI & ML
- Employment: Full-time
- Posted: 2026-10-13
- Skills: Stable Diffusion, latent diffusion, FLUX
- Apply: https://jobs.ashbyhq.com/black-forest-labs/e7935ad1-7b9a-4c85-8b40-09cafedf7d63

## Description

ABOUT BLACK FOREST LABS

We’re the team building the foundational layer for visual intelligence: multimodal models trained jointly on images, video, audio, and action to see, generate, and understand the world.

Our founding team pioneered latent diffusion and Stable Diffusion, the breakthroughs that made generative AI accessible to millions. With FLUX, we're pushing into generative media at scale, machines that act in the physical world, and emerging applications in computer use.

Our FLUX models top public benchmarks and run in production in some of the world's biggest platforms. We're a small, fast growing research lab competing with the largest companies in the world. From our labs in Freiburg to San Francisco, we're building what comes next.




WHY THIS ROLE

Frontier image and video models are now good enough that the hard question is no longer whether they work, but whether a new one is actually better, and how you'd know. Aesthetics, prompt following, editing fidelity, text rendering, character consistency: none of these collapse into a single number, and public benchmarks have fallen well behind the models they're meant to measure.

You'll work on the system BFL uses to answer that question. Every FLUX checkpoint, every finetuning and RL run, and every competitor release goes through our evaluation stack, and you'll help build and sharpen it. Product Research relies on what it shows to decide what to fix next, and to confirm the fix worked.

It gets harder from here. FLUX 3 is our first multimodal model, spanning image, video, audio and action, and each new modali

More Black Forest Labs roles: https://deviantjobs.com/companies/black-forest-labs