Backend Engineer

OpenTrain AI | REMOTE (US) | Part-time | Backend Engineer, AI Coding Task Design

OpenTrain AI connects experienced professionals with paid, part-time AI training work. We are the hiring company and are actively filling this role.

- $30–$100 per hour equivalent, paid per accepted task - 100% remote, United States - About 15 hours/week; choose your schedule

We need backend engineers to design realistic coding tasks for AI systems, write deterministic verifiers, assess correctness and code quality, and apply secure coding and security review where relevant. This work helps improve AI systems that write software.

Ideal background - Strong professional backend experience with Python, Java, Node.js, Go, Rust, TypeScript, C++ or similar - Scalable APIs/services, complex features, debugging, bottleneck resolution and code review - Strong analytical, problem-solving and technical communication skills; professional English - Helpful: application security, secure coding, vulnerability assessment, penetration testing, OWASP/CWE or security-focused code review - No AI experience needed; structured task-design guidelines and verification criteria are provided

Independent contractor; pay is per accepted task. Fully remote and flexible, with no fixed shifts. Apply on OpenTrain (resume upload): https://app.opentrain.ai/api/out/cmu9linxg000o0bgm9xiw33b9?c...

Then complete a short application on the hiring platform. Shortlisted applicants take a short AI interview.