[Remote] Full Stack Engineer - AI/ML

Note: The job is a remote job and is open to candidates in USA. 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

Benefits

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

Company Overview

Mercor is an AI-based hiring platform that improves the recruitment process by matching talent with opportunities tailored to their skills. It was founded in 2023, and is headquartered in San Francisco, California, USA, with a workforce of 201-500 employees. Its website is https://mercor.com.

Company H1B Sponsorship

Mercor has a track record of offering H1B sponsorships, with 19 in 2026, 7 in 2025. Please note that this does not guarantee sponsorship for this specific role.