Member of Technical Staff Research Software Engineer

Reflection is an AI research lab building open frontier models and a full AI stack for developers, enterprises, and public-sector users.

New York, United States
About Reflection

Reflection develops open-weight AI models, open-source software for customizing and running agents, AI-factory infrastructure, and related solutions. Its current research emphasizes large language models, reinforcement learning, and agentic reasoning.

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Skills

About the Role

You will architect and optimize training infrastructure for reinforcement-learning loops, distributed GPU systems, and large-scale data pipelines. You will turn research ideas into reliable production systems, build experiment tooling, diagnose training bottlenecks, and improve numerical stability, performance, and reproducibility.

Requirements

  • Software engineering skills and machine-learning knowledge.
  • Experience implementing research papers.
  • Deep experience in distributed training and inference or data infrastructure.
  • Knowledge of machine-learning algorithms, distributed systems, and high-performance computing.
  • Performance, numerical stability, and reproducibility expertise.

Responsibilities

  • Design and optimize large-scale training loops and data pipelines.
  • Implement state-of-the-art techniques with numerical stability and computational efficiency.
  • Build tooling to launch, monitor, and reproduce complex experiments.
  • Diagnose training-stack bottlenecks, including GPU memory, communication, and dataloader issues.
  • Translate research prototypes into reusable production-grade infrastructure.

Benefits

  • Stock options.
  • Comprehensive medical, dental, vision, and life insurance.
  • Annual wellness allowance.
  • Daily in-office lunch and dinner.
  • 22 weeks of paid parental leave.
  • Unlimited paid time off in the U.S. and 30 days in the U.K.
  • Visa sponsorship and long-term immigration-pathway support where applicable.
  • Regular off-sites, happy hours, and team celebrations.
Member of Technical Staff Research Software Engineer at Reflection | JobStash