Backend Developer (Spain)

Overview

Remote, project-based Backend Developer consultant role focused on designing and evaluating realistic software engineering tasks for an AI lab.

What you'll do

• Design and implement multi-file backend coding tasks covering bug fixing, feature development, refactoring, and testing.
• Write natural-language specifications and reference implementations for tasks.
• Develop and extend unit and integration test suites.
• Review peer-generated tasks for correctness, clarity, and realism.
• Identify edge cases, ambiguities, and potential failure modes.
• Ensure alignment between specifications, code, and expected outputs.

What you'll need

• 3–7 years of professional software engineering experience.
• Advanced professional written proficiency in English.
• 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).

Details

• Location: Spain.
• Engagement: Part-time, project-based expert evaluation work.
• Work type: Remote.