Software Engineer, Frontier Models & Signals

Candidate; New York (NY); On-site; USD 170,000 - 260,000; Full time

Job summary

SpaceXAI is hiring a Software Engineer to own the bridge between frontier models and user facing Cursor products. You will decide which model to use, spot where models go off track, and build guardrails to keep them on course.

This role sits at the intersection of infrastructure, data, and product, bringing models from preview to production. You will work with research, inference, product, and data science teams to turn evidence into better products and better models, with impact that compounds

Qualifications

• Experience shipping production systems used at scale.

Responsibilities

• Get new frontier models into users' hands the day they're ready, and retire old ones without anyone noticing.
• Evaluate internal and external preview models before launch and give meaningful feedback to the teams building them.
• Build Cursor Router: decide which model handles each request, balancing quality, speed, and cost at massive scale.
• Build the eyes and ears of the product, and the experimentation platform that puts them to work: signals that show where each model shines, where it goes off track, and what 'better' actually means.

Skills

Model lifecycle

Model serving

Experimentation

Data collaboration

Tools

Cursor Router

Signals platform

Job description

SpaceXAI is hiring a Software Engineer to own the bridge between frontier models and user facing Cursor products. You will decide which model to use, spot where models go off track, and build guardrails to keep them on course.

This role sits at the intersection of infrastructure, data, and product, bringing models from preview to production. You will work with research, inference, product, and data science teams to turn evidence into better products and better models, with impact that compounds