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ML Researcher - Image / Video Diffusion

Krea· 02. Research
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San FranciscoFull-timePosted 1mo ago

About the role

Researcher focused on large-scale image and video diffusion models, training experiments, and distributed training at scale for Krea's AI creative tools.

Responsibilities

  • Train diffusion models for image and video generation on large GPU clusters.
  • Fully optimize and profile large distributed training runs across model architectures, kernels, data loading, memory constraints, and communication.
  • Implement and improve various distributed training strategies including FSDP, CP, SP, TP, and EP.
  • Continuously improve model quality and reliability through data, model architecture, training pipeline, structuring experiments, and eval design.
  • Debug distributed training errors and implement fault tolerance solutions, identifying bad GPU, NVLink, Infiniband (IB) components as well as monitoring numerical errors and NCCL issues.
  • Ablate different architecture, attention, optimizer, data, and algorithmic choices to reliably improve efficiency and performance of our models.

Qualifications

  • Proven track record in working with image or video models at scale (publications or open-source contributions a plus).
  • Strong proficiency in PyTorch and understanding of its inner workings.
  • Strong background in distributed training paradigms such as FSDP, CP, SP, USP, TP, and EP. Understanding how different parallelism strategies work together and their tradeoffs.
  • Experience in profiling and debugging large distributed training. Comfortable with analyzing traces to identify bottlenecks and look for improvements.
  • Good knowledge of low precision training / inference in FP8, NVFP4, and MXFP8.
  • Solid understanding of diffusion model training pipeline across pretraining, midtraining, preference optimization, and reinforcement learning.
  • Keeping up with developments in related fields (LLM, VLM, representation learning, robotics).
  • Ability to work in a goal-oriented research environment and make strategic decisions about training approaches to scale compute and data.
  • Comfort working with underspecified goals and breaking them into concrete requirements, plans, experiment plans, and execution items.
  • Good research taste — bias towards simplicity and methods that scale with compute, data, and minimal human supervision.
  • Ability to iterate rapidly and propose creative research directions.
  • Experience designing custom data pipelines to improve data quality.

Benefits

  • Competitive compensation: generous salary & equity packages
  • Health & wellness: 100% health & 99% dental/vision insurance premiums covered for employees, health FSA accounts, & long-term disability coverage
  • Time off: Flexible PTO policy
  • Financial planning: 401k with a 4% company-sponsored match
  • Meals in the office: breakfast, lunch, dinner - you name it, we'll cover it
  • Transit: Ubers covered to & from the office
  • Sponsorship: We're open to sponsoring international visas where we can (e.g., STEM OPT, OPT, H-1B, O-1, E-3)
Last updated Sep 3, 2026. Interested? Apply on the company site.

About Krea

The most powerful AI suite for Creatives.

Generate, edit, and enhance images, videos, and 3D assets with Krea's creative AI suite. Start for free with real-time tools, powerful models, and collaborative workflows.

AI Image GenerationAI Video GenerationAI 3D GenerationImage EnhancementsVideo EnhancementsFinetuningAsset Management
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