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Machine Learning Research Engineer, Enterprise ML Systems

Work from home Full-time role Hiring

Scale AI is a leading AI data foundry focused on accelerating the development of AI applications. The Machine Learning Research Engineer will build algorithms for a next-gen Agent RL training platform, support large scale training, and integrate state-of-the-art technologies to optimize ML systems for enterprise clients.

Responsibilities

  • Build, profile and optimize our training and inference framework
  • Post-train state of the art models, developed both internally and from the community, to define stable post-training recipes for our enterprise engagements
  • Collaborate with ML teams to accelerate their research and development, and enable them to develop the next generation of models and data curation
  • Create a next-gen agent training algorithm for multi-agent/multi-tool rollouts

Skills

  • At least 1-3 years of LLM training in a production environment
  • Passionate about system optimization
  • Experience with post-training methods like RLHF/RLVR and related algorithms like PPO/GRPO etc
  • Ability to demonstrate know-how on how to operate the architecture of the modern GPU cluster
  • Experience with multi-node LLM training and inference
  • Strong software engineering skills, proficient in frameworks and tools such as CUDA, Pytorch, transformers, flash attention, etc
  • Strong written and verbal communication skills to operate in a cross functional team environment
  • PhD or Masters in Computer Science or a related field

Benefits

  • Comprehensive health, dental and vision coverage
  • Retirement benefits
  • A learning and development stipend
  • Generous PTO
  • A commuter stipend

Company Overview

  • Scale’s mission is to develop reliable AI systems for the world’s most important decisions. It was founded in 2016, and is headquartered in San Francisco, California, USA, with a workforce of 501-1000 employees. Its website is https://scale.com.
  • Company H1B Sponsorship

  • Scale AI has a track record of offering H1B sponsorships, with 73 in 2025, 55 in 2024, 29 in 2023, 17 in 2022, 10 in 2021, 10 in 2020. Please note that this does not guarantee sponsorship for this specific role.
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