Member of Technical Staff - Post Training
Black Forest Labs7 months ago
Freiburg im Breisgau, GermanySenior / Staff+
Responsibilities
- Own the full post-training pipeline from data curation to deployment.
- Advance techniques across the post-training stack including SFT and RLHF.
- Work across modalities such as text-to-image and video post-training.
- Build personalization capabilities for user adaptation of models.
- Design and maintain high-throughput fine-tuning and evaluation infrastructure.
- Identify and close quality and alignment gaps through targeted research.
Requirements
- Experience owning post-training for a frontier generative model.
- Deep knowledge of the post-training stack including reward modeling and preference learning.
- Comfortable working across modalities including text-to-image and ideally video.
- Strong fluency in PyTorch and ability to write research code.
- Experience with distillation or building high-throughput evaluation pipelines is a plus.
- A bias toward shipping measurable model-quality improvements.
Benefits
- Flexible work arrangements with options for remote work and in-person collaboration.
- Coverage of reasonable travel costs for in-person meetings.
- A supportive team culture grounded in values of obsession, low ego, boldness, and kindness.
Tech Stack
Categories
Data Science
About Black Forest Labs
Black Forest Labs builds generative image and video models for creators, developers, and enterprises, including the FLUX series and work behind Latent Diffusion/Stable Diffusion. It distributes models and tooling via open releases, APIs, and enterprise licensing for image generation and editing workflows. Founded in 2024 and headquartered in Freiburg, Germany, the privately held company focuses on visual AI research with a presence in San Francisco.