Full-Stack Developer - Ai Trainer (Spain)

Anyone AI is recruiting skilled Full-Stack Developers to work on a project with a leading AI lab.Qualifications:Advanced professional written proficiency in English3-7 years of professional software engineering experienceStrong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or GoBackend or full-stack development experience in production systemsExperience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing)Proven ability to debug and navigate large, multi-file codebasesExperience with code reviews, refactoring, and production migrationsEngagement:Part-time, project-based expert evaluation workWork Type:RemoteContributors will design and evaluate realistic software engineering tasks, including bug resolution, feature implementation, refactoring/migration, and test generation. Work includes both creating complex coding scenarios and reviewing peer submissions for quality and accuracy.This is a project-based consultant role. Consultants will be paid on a per-project basis; hourly rates are estimates based on anticipated completion time. Consultants control their own schedule, provide their own tools, and may simultaneously provide services to other vendors/employers (subject to those vendors’ allowances).Responsibilities:Contributors will:Design and implement multi-file coding tasks across bug fixing, feature development, refactoring, and testingWrite clear natural-language specifications and reference implementationsDevelop and extend unit and integration test suitesReview peer-generated tasks for correctness, clarity, and realismIdentify edge cases, ambiguities, and potential failure modesEnsure alignment between specifications, code, and expected outputsExpected Outcomes:High-quality, production-realistic coding tasksComplete and correct reference implementationsRobust test coverage and validation artifactsStructured, actionable peer review feedback#J-*****-Ljbffr

Advanced professional written proficiency in English 3-7 years of professional software engineering experience Strong proficiency in Python and JavaScript/TypeScript; working knowledge of Java, C#, or Go Backend or full-stack development experience in production systems Experience with testing frameworks (e.g., pytest, Jest, JUnit, xUnit, Go testing) Proven ability to debug and navigate large, multi-file codebases Experience with code reviews, refactoring, and production migrations Engagement: Part-time, project-based expert evaluation work Work Type