Full-Stack Engineer

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