Cursor
Software Engineer, Model Lifecycle and Signals
New York, NY +1 · On-site · Full-time · Posted Oct 15, 2026
- Location
- New York, NY
San Francisco, CA
About the job
Owns the systems that bring frontier models into Cursor products, route requests to suitable models, evaluate their performance, and turn product signals into model and product improvements.
What you'll do
- Launch and retire models in production; evaluate preview models and provide feedback to their developers.
- Build Cursor Router to select models for requests while balancing quality, speed, and cost.
- Build signals and experimentation systems to measure model behavior and identify improvements.
What they ask for
- Track record of shipping production systems and owning problems end to end.
- Experience building or operating evaluation, measurement, or model-serving systems, such as AI evals, experimentation, ranking/relevance, or routers.
- Ability to translate ambiguous quality questions into metrics, pipelines, and decisions.
- Fluency with data and effective collaboration with data scientists and researchers.
Nice to have
- Curiosity about model and agent behavior; tries new models and understands their strengths.
AI focus
Model evaluation, routing, serving, and product-signal systems that guide model and product improvements.
Model-written summary · the original posting is authoritative