Sr. Model Engineer
Cursor is an AI coding-agent product operated by Anysphere, Inc.; it was acquired by SpaceX in August 2026 and continues to operate.
Funding history
About Anysphere, Inc. (doing business as Cursor)
Cursor provides AI-assisted software-development tools, including desktop and CLI coding agents, autonomous cloud agents, code review, and enterprise offerings.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You'll own hard, ambiguous research problems end to end: forming hypotheses, designing experiments, building the training, eval and data needed to test them, and pushing results into the next model. You'll improve data quality, design rewards and graders, advance post-training recipes for coding and computer-use agents, and work with engineers to scale promising results to frontier-scale runs.
Requirements
- 3+ years of hands-on experience training or post-training large neural networks (1B+ parameters), including pre-training, fine-tuning or RL-based methods (e.g., RLHF, DPO)
- Experience writing production-quality code in Python, PyTorch, JAX, Rust, or C++
- Must be able to work in person at the Palo Alto office
Responsibilities
- Design and run rigorous experiments that turn research ideas into measurable model gains
- Improve data recipes through data quality, deduplication and mixture experiments
- Define good RL data and rewards, including grader design and preventing reward hacking
- Advance training science from architecture and scaling experiments to post-training recipes for coding and computer-use agents
- Build evals and targeted tasks that expose model weaknesses
- Partner with engineers to scale results to frontier-scale training runs
Benefits
- Equity
- Comprehensive medical, vision and dental coverage
- 401(k) retirement plan
- Short and long-term disability insurance
- Life insurance
- Various discounts and perks