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Full-Stack Engineer at OpenTrain AI. Location Information: Anywhere in the World. . Headquarters:. United States . URL:. . https://opentrain.ai/. . . Full-Stack Engineer, Part-Time AI Code Evaluation - Remote (United States). . • $50–$100 per hour equivalent, paid per accepted task. • 100% remote. • Part-time. • Under 20 hours a week, you choose when. . Work on AI code evaluation on your own schedule, using your full-stack engineering judgment to create, review and validate software tasks.. . AI systems improve through examples reviewed by engineers. In this role, full-stack professionals design realistic tasks, assess generated code, write reference solutions, and explain technical gaps. The work is part-time remote contract work for under 20 hours per week.. . What you'll do. • Create and solve realistic full-stack tasks involving user-facing features and APIs. • Trace requests and data across browsers and back-end services to judge whether an AI implementation works correctly. • Write professional reference solutions and validate code across front-end and back-end systems. • Review AI-generated code for security, performance and maintainability, and explain where it needs improvement. . Why this is worth your time. • Earn $50–$100 per hour equivalent for accepted tasks that meet project specifications while applying your full-stack engineering judgment.. • Review AI-generated code for security, performance and maintainability across front-end and back-end systems.. • Use your full-stack experience to assess AI-generated solutions across unfamiliar codebases and complete software systems.. • Fully remote and flexible, no fixed shifts, no commute. . Who this is for. • Strong professional experience building production full-stack applications across multiple programming languages. • Strong full-stack systems knowledge covering browser applications, APIs, application state, databases, service integration, architecture and debugging. • Professional fluency in English; experience contributing to complete software-system architecture, working in unfamiliar codebases, and solving difficult debugging problems. • No AI experience needed. Experience reviewing AI-generated code for security, performance and maintainability is helpful.. . Pay and details. • $50–$100 per hour equivalent; pay is per accepted task, as an independent contractor. • Part-time, under 20 hours a week, you choose when; fully remote, United States. . How to apply. 1. Apply on OpenTrain (about two minutes): https://app.opentrain.ai/api/out/cmu3vn4y500000bgm9fcp5md7?ch=weworkremotely&sub=weworkremotely-cmu3vn4y5-us-2026-10. 2. Complete a short application on the hiring platform.. 3. If shortlisted, take a conversational AI interview with technical questions and a coding challenge, whenever it suits you.. . Ready to apply your full-stack engineering judgment to AI code evaluation? Apply today.. . About OpenTrain AI. OpenTrain AI connects experienced professionals with paid, part-time AI training work: shaping and improving the AI systems that companies are building right now.. . To apply:. . https://weworkremotely.com/remote-jobs/opentrain-ai-full-stack-engineer.