Full-Stack Engineer - AI Systems

About the job

Mercor connects elite creative and technical talent with leading AI research labs. Headquartered in San Francisco, our investors include Benchmark , General Catalyst , Peter Thiel , Adam D'Angelo , Larry Summers , and Jack Dorsey . Position: Full-Stack Software Engineer Type: Contract Compensation: $50–$80/hour Location: Remote

Role Responsibilities

• Write precise product specifications for application development and automatic grading.
• Build complete reference implementations that meet all written criteria.
• Author browser-driven acceptance criteria to verify user-visible behavior.
• Calibrate task difficulty using frontier models to achieve target performance.
• Verify tasks fail cleanly against empty repositories to ensure genuine feature development.

Qualifications Must-Have

• 3+ years of professional full-stack engineering experience.
• Fluency in at least one modern frontend framework and one backend runtime.
• Experience with auth , permissions , payment flows , and file upload in production.
• Ability to specify systems precisely in writing.
• Comfort with Docker , Git , and command-line tooling.

Preferred

• Experience building evaluations, benchmarks, or test suites for AI systems .