Remote Full‑Stack Engineer for AI Research & Tools

mercor; United States; Remote; USD 69,000 - 90,000; Full time

Job summary

Mercor is seeking a Software Engineer, Full Stack (Python, Java, Rust, C#, C++) for contract work. The role is remote, with a 40-hour week, and involves building end-to-end full-stack applications, APIs, and tools to advance frontier model capabilities.

Requirements include 3+ years in production software, proficiency in at least one listed language plus a second language, and strong written communication to document decisions and progress.

Qualifications

• 3+ years of dedicated professional experience building and shipping production software at a recognized, top-tier organization.
• Experience in 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), 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.

Responsibilities

• Build and ship full-stack applications, services, and internal tools using Python, Java, Rust, C#, C++, or TypeScript.
• 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 experience

Backend services

Frontend frameworks

Onboard quickly

Strong written communication

Tools

React

Databases

Cloud deployment

Job description

Mercor is seeking a Software Engineer, Full Stack (Python, Java, Rust, C#, C++) for contract work. The role is remote, with a 40-hour week, and involves building end-to-end full-stack applications, APIs, and tools to advance frontier model capabilities.

Requirements include 3+ years in production software, proficiency in at least one listed language plus a second language, and strong written communication to document decisions and progress.