Mindrift is hiring a Senior Python Engineer - AI Testing Project (Freelance, Mindrift)

Mindrift is looking for a Senior Python Engineer for a freelance, project-based role focused on AI testing. You will create functional tests for large codebases, manage Docker environments for reproducibility, and leverage large language models to enhance development speed and quality.

What You'll Do

• Create functional black box tests for large codebases in various source languages
• Create and manage Docker environments to ensure 100% reproducible builds and test execution across different platforms
• Monitor code coverage and configure automated scoring criteria to meet industry benchmark-level standards
• Leverage LLMs (Roo Code, Claude) to accelerate development cycles, automate repetitive tasks, and improve overall code quality

What We're Looking For

• 5+ years of experience as a Software Engineer, primarily using Python
• Deep experience with pytest (fixtures, session-scoped, timeouts) and designing black-box functional tests for CLI tools
• Expert-level Docker skills (reproducible Dockerfiles, user contexts, secure workspaces)
• Strong Linux & Bash scripting skills and comfort debugging inside containers
• Proficiency with modern Python tooling (uv, pyproject.toml, packaging)
• Ability to read and understand with LLM assistance many coding languages (for example C, C++, Rust, or Go)
• Experience using LLMs (Claude Code, Roo Code, Cursor) to accelerate iterative development and test-case generation
• English language - B2 or higher

Nice to Have

• Prior experience with agent evaluation platforms and MCP CLI

Technical Stack

• Python (pytest, uv, Pillow)
• Docker, Bash, Git Submodules
• C/C++/Rust/Go (reading), Dagger
• GitHub Codespaces, LLMs (Claude Code, Roo Code, Cursor)
• coverage.py, gcov, kcov

Benefits & Compensation

• Freelance project-based collaboration via the Mindrift platform (powered by Toloka AI)
• Fully remote and flexible participation — choose when and how much to contribute (20-30 hours per week)
• Task-based compensation, equivalent to up to $21/hour* depending on performance and volume
• Opportunity to contribute to innovative AI projects for leading tech companies
• Supportive global community

Work Mode

This is a fully remote freelance role with a flexible schedule, open to global participants.