Please submit your CV in English and indicate your level of English proficiency.
Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment.
What This Opportunity Involves

You'll create challenging coding test cases that push AI coding systems to their limits:
Review and refine realistic coding tasks based on provided production codebases with realistic scope, requirements and information sources
Write comprehensive functional tests that validate vigente end-to-end behavior and edge-cases, not just superficial checks
Craft "fair but hard" challenges where the AI has all the context it needs, but has to work for it (information scattered across files and external sources, complex reasoning required)
Analyze AI failures to understand what the model struggles with vs. what it masters
Iterate based on feedback from expert QA reviewers who score your work on 7 quality criteria
What We Look For





This opportunity is a good fit for experienced developers, software engineers, and/or test automation specialists open to part-time, non-permanent projects. Ideally, contributors will have:
Degree in Computer Science, Software Engineering or related fields
5+ years in software development, primarily Python (pytest, async/await, subprocess, file operations)
Background in Full-Stack development, with an equal focus on building React-based interfaces and robust Back-end systems
Experience writing tests (functional, integration - not just running them)
Docker containers (running evaluations locally in containers)
CI/CD understanding (GitHub Actions as a user: triggers, labels, reading results)
English proficiency - B2
How It Works

Apply → Pass qualification(s) → Join a project → Complete tasks → Get paid
Effort estimate

Tasks for this project are estimated to take 20 hours to complete, depending on complexity. This is an estimate and n

📌 Senior Software Engineer in Test (Madrid)
🏢 Mindrift
📍 Madrid