Backend Engineer, Part-Time AI Coding Task Authoring - 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 the cutting edge of AI coding tools, on your own schedule, and get paid for the backend engineering skills you already have. The AI systems changing how software gets built are trained and tested by real engineers. The teams building them need software engineers who can create realistic coding problems, judge how well the AI solves them, write the solution a professional would produce, and explain exactly where the AI falls short. Your judgment becomes part of how the next generation of AI coding tools works. This is that work, done remotely around your current job. What you'll do • Create realistic coding tasks for feature work and bug fixes • Set up reproducible test environments and automated checks to verify submissions against expected behavior • Produce the reference implementation for every coding task • Review technical submissions, calling out defects and performance bottlenecks Why this is worth your time • Earn the equivalent of $50–$100 an hour while building real AI skills alongside your current job • Work on realistic coding problems, test environments and reference solutions that support AI coding evaluation • Review technical submissions, analyze defects and performance bottlenecks, and document your reasoning • Fully remote and flexible, no fixed shifts, no commute Who this is for • Professional fluency in English • Hands-on expertise in Python, Java, TypeScript, Node.js, Go, Rust, C++ or a similar backend language, shown through clear contributions to open-source projects or an equivalent portfolio • Experience across backend work such as building services that scale, API development, debugging, automated test suites, performance bottlenecks, and refactoring large or legacy codebases, with a sound grasp of algorithms and data structures • Strong skills in reviewing code, writing documentation, analysis and explaining technical work clearly • Helpful: a record of shipping backend features with cross-functional teams, and a strong public GitHub profile • No previous AI experience required; the role focuses on backend coding evaluation and technical review. Pay and details • $50–$100 per hour equivalent; pay is per accepted task, as an independent contractor • Under 20 hours a week, you choose when; fully remote, United States How to apply 1. Apply on OpenTrain (upload your resume): https://app.opentrain.ai/api/out/cmv7ep1jl000502o277l5i2xq?ch=rebuix&sub=rebuix-cmv7ep1jl-us-2026-10 2. Complete a short application on the hiring platform. 3. Next comes a conversational AI interview with technical questions and a coding challenge. Passing it is how you qualify for paid tasks, so take it soon after you are invited; you can take it any time, from anywhere. Ready to put your backend engineering skills to work at the frontier of AI? 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. PAID OPTIONS: NONE.