Jobs with visa sponsorship in United States

About the role

This is an on-site role based in San Francisco, CA (with a presence also in Singapore). Visa sponsorship is available. We're a fast-growing AI infrastructure company building the technical foundation for training and evaluating frontier AI agents. As a Research Engineer , you will work across agent training environments, benchmarks, and synthetic data pipelines — shaping how AI agents learn, improve, and are evaluated at scale.

What you'll bring

• 2–4 years of professional experience as a Research Engineer or in a comparable role delivering systems for AI agent training and evaluation.
• Strong proficiency in Python, Docker, and Linux environments.
• Hands-on experience with benchmarks and evaluations for RL training, including reasoning about task realism, rubric reliability, environment usability, and trajectory quality.
• Experience building systems for creating, running, and evaluating AI agent training environments.
• Experience designing experiments and building metrics/analyses to diagnose model behavior, agent failure modes, and data quality.
• Proven ability to build infrastructure, tools, or pipelines in early-stage environments without fully prescribed roadmaps.
• Experience building internal research infrastructure or data pipelines.
• Experience designing metrics and validation workflows.
• Background in competitive programming, Olympiad mathematics/computing, academic research, or exceptionally strong independent project work.
• Comfort working and communicating clearly across time zones.