Member of Technical Staff Research Software Engineer
ReflectionVisit Reflection website
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
Funding history
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.
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.
