Backend Developer - AI Trainer (Spain)
Anyone AI
Apply at Anyone AIOpens the employer's own posting.
- Where
- On-site · Madrid
- Salary
- €94k–166k
- Technologies
- JavaPythonTypeScriptJavaScriptC#
- First sniffed
- 25 Aug 2026 08:36 · open 7 days
- Last verified
- 01 Sept 2026 12:04 · still on the employer's site
- Source
- Company careers page via adzuna
Anyone AI is recruiting skilled Backend Developers to work on a project with a leading AI lab. Qualifications: 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 navigat…