Full Stack Engineer - AI/ML

Summary

Mercor connects elite creative and technical talent with leading AI research labs and is headquartered in San Francisco. The company is seeking a Full Stack Software Engineer to build applications, services, and internal tools that exercise frontier model capabilities, integrate pre-release model APIs, and evaluate model performance. The role also involves diagnosing integration issues, prototyping against changing requirements, and collaborating on code quality and technical documentation.

Responsibilities

• Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities end to end
• Integrate pre-release model APIs into working software, including tool interfaces, evaluation harnesses, and telemetry
• Diagnose and document model and integration failure modes, translating engineering observations into clear written feedback for the research team
• Prototype quickly against shifting requirements, delivering working increments with limited up-front specification
• Collaborate with the engineering manager and other engineers to maintain consistency in code quality, architecture, and technical documentation

Skills

• 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization
• Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language
• Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment
• Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up
• Ability to engage reliably for at least 40 hours/week during weekdays
• Strong written communication skills and the ability to explain complex technical decisions clearly

Qualifications

Must Haves

• 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization
• Production experience in at least one of Python, Java, Rust, C#, or C++, plus working proficiency in a second language
• Hands-on experience across the stack: backend services and APIs, a modern front-end framework (React or equivalent), relational or document databases, and cloud deployment
• Demonstrated ability to onboard onto an unfamiliar codebase and deliver working code quickly with minimal ramp-up
• Ability to engage reliably for at least 40 hours/week during weekdays
• Strong written communication skills and the ability to explain complex technical decisions clearly

Benefits

• Remote work arrangement
• W-2 employment with Cincinnatus LLC
• Paid weekly via Stripe Connect