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[Remote] AI Full Stack Engineer

Remote Full-time Now Hiring

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. The company is seeking a Senior Software Engineer, Full Stack 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 rapid prototyping, diagnosing integration failures, and collaborating on code quality, architecture, and documentation.

Responsibilities

  • Build and ship full-stack applications, services, and internal tools in Python, Java, Rust, C#, C++, or TypeScript to exercise frontier model capabilities
  • 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

  • 6+ years of professional experience building and shipping production software
  • Deep production experience in at least one of Python, Java, Rust, C#, or C++
  • Hands-on ownership across the stack: backend service and API design, a modern front-end framework (React or equivalent), data modeling, and cloud deployment
  • Ability to onboard onto an unfamiliar codebase and deliver working code quickly
  • Strong written communication skills

Benefits

  • Remote work arrangement
  • W-2 employment with Cincinnatus LLC

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.