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Mindrift • Barcelona, Catalonia, Spain
Salary: $30 / hour
Role & seniority
Experienced software engineer / test automation specialist
Part-time, project-based (non-permanent)
Stack/tools
Python (pytest, async/await, subprocess, file I/O)
Full-stack: React front-end + robust back-end systems
Docker (local evaluations)
CI/CD (GitHub Actions)
English proficiency: B2
Top 3 responsibilities
Create challenging coding test cases and refine tasks based on production codebases
Write comprehensive end-to-end functional tests and cover edge-cases
Analyze AI failures, differentiate on model strengths/weaknesses, and iterate from QA feedback
Must-have skills
5+ years in software development
Proficiency in Python (pytest, async/await, subprocess, file operations)
Full-stack experience (React + back-end)
Experience writing functional/integration tests
Docker-based local evaluation setup
CI/CD knowledge (GitHub Actions) and ability to read/trigger results
English proficiency at B2
Nice-to-haves
Experience testing against real production-like codebases
Familiarity with AI evaluation/testing workflows
Strong debugging and test strategy development
Prior remote/contract-based or part-time project experience
Location & work type
Remote/distributed work
Part-time, project-based opportunities with hourly or fixed rates (rates up to $30/hour)
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 isproject-based, not permanent employment.
What This Opportunity Involves
Review and refine realistic coding tasks based on provided production codebases with realistic scope, requirements and information sources Write comprehensive functional tests that validate actual 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
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 not a schedule requirement; you choose when and how to work. Tasks must be submitted by the deadline and meet the listed acceptance criteria to be accepted.
Payment
Paid contributions, with rates up to $30/hour* Fixed project rate or individual rates, depending on the project Some projects include incentive payments
Note: Rates vary based on expertise, skills assessment, location, project needs, and other factors. Higher rates may be offered to highly specialized experts. Lower rates may apply during onboarding or non-core project phases. Payment details are shared per project