Backend Developer - AI Trainer (Spain)

📋 Description

• • This role involves designing and evaluating realistic software engineering tasks for a leading AI lab, contributing to the development of high-quality coding challenges used in AI training and evaluation.
• • Day-to-day responsibilities include creating multi-file coding tasks across bug fixing, feature development, refactoring, and test generation; writing clear natural-language specifications and reference implementations; developing and extending unit and integration test suites; reviewing peer submissions for correctness, clarity, and realism; identifying edge cases and ambiguities; and ensuring alignment between specifications, code, and expected outputs.
• • Anyone AI Inc. is a remote-first company collaborating with top AI labs to advance AI capabilities through expert human-in-the-loop contributions, focusing on scalable, production-realistic software engineering evaluations.
• • In this role, you will deepen your expertise in software design, testing, and code quality while contributing to cutting-edge AI development; you’ll gain experience in task authoring, peer review, and creating robust, production-like coding scenarios that push the boundaries of AI training data quality.