Black Forest Labs

Member of Technical Staff - Research Engineer

San Francisco · Staff+

Sponsorship not specifiedEUR 130k-EUR 240kDetected 22 days ago

Distributed SystemsPyTorchLLMsResearchCommunication

About the role

We're creating the generative models that power how people make images and video-tools used by millions of creators, developers, and businesses worldwide.
Our FLUX models are among the most advanced in the world, and we're just getting started.
You will work directly with researchers, but your output will often be code, measurements, kernels, debugging tools, and training-system changes that make better research possible.

Kind. People over politics. We treat each other with genuine warmth. Agency without empathy creates chaos.

Experience with distributed training concepts such as FSDP, tensor/model/context/sequence parallelism, activation checkpointing, NCCL, and overlapping compute and communication
Experience profiling GPU workloads with tools like Nsight Systems, Nsight Compute, torch profiler, trace viewers, or custom telemetry
Have written or substantially improved forward/backward GPU kernels, or have shown you can make progress on kernel-level work with strong measurement and validation discipline
Have experience with diffusion, flow matching, DiT, and multimodal generative model training
if your deepest background is autoregressive or LLM training systems, you are excited to learn the diffusion and multimodal modeling stack quickly

Headquartered in Freiburg, Germany with a growing presence in
Help the training team move quickly when an urgent bottleneck appears, while turning repeated failures into better abstractions and tools

Obsessed. We are a frontier research lab. The science has to be right, the understanding deep, the product beautiful.

This listing is sourced directly from Black Forest Labs's careers page and normalized into a canonical job model.