Mindrift is hiring a Senior Python Engineer for a freelance project focused on AI testing for leading tech companies. You will build and manage test systems, ensuring high-quality, reproducible results while leveraging LLMs to enhance development speed and code quality.
What You'll Do
- Create functional black-box tests for large codebases in various source languages.
- Build and manage Docker environments to ensure 100% reproducible builds and test execution across platforms.
- Monitor code coverage and configure automated scoring criteria to meet industry benchmark standards.
- Leverage LLMs like Claude Code and Roo Code 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 code in multiple languages (e.g., C, C++, Rust, or Go) with the aid of LLMs.
- Experience using LLMs (Claude Code, Roo Code, Cursor) to accelerate iterative development and test-case generation.
- English language proficiency at B2 level or higher.
Nice to Have
- Prior experience with agent evaluation platforms and MCP CLI.
Technical Stack
- Python: pytest, uv, Pillow
- Infrastructure: Docker, Bash, Git Submodules, Dagger, GitHub Codespaces
- Languages: C/C++/Rust/Go (reading)
- Tools: 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 $80/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, global freelance role.
