Senior Python Developer - Code Migration Specialist
Join Mindrift for a fully remote, project-based freelance opportunity supporting top tech companies in enhancing AI systems. As a senior-level contributor, you’ll develop functional black box tests, set up reproducible Docker environments, monitor code coverage, and leverage LLMs like Roo Code or Claude Code. Expect a flexible workload of 20-30 hours/week with task-based compensation, offering up to $40/hour, plus the chance to work in a global, supportive community.
Ideal candidates have 5+ years of Python engineering experience, strong pytest and Docker skills, proficiency in Linux/Bash scripting, and an ability to read C/C++/Rust/Go. Experience with agent evaluation platforms, MCP CLI, and LLMs is highly valued. A B2 or higher level of English is required.
Please note: This is not a permanent employment opportunity, and compensation varies based on skills, expertise, and project requirements. Payment specifics are disclosed per project phase. Submit your CV in English and specify your English proficiency level.
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.
About the Role
This project is suited for a Senior Python developer with deep functional testing experience, strong Linux and Docker skills, the ability to read code across multiple languages with the support of LLMs (e.g., C, Rust, Go) and translate requirements for migration tasks, and confidence using tools like Roo Code or Claude Code to accelerate iterative development.
Key Responsibilities
- 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
- 5+ years of experience as a Software Engineer (primarily 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 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
Requirements +
- Prior experience with agent evaluation platforms and MCP CLI
Tools and Technologies: 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.
What we can offer
- 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 $40/hour* depending on performance and volume
- Opportunity to contribute to innovative AI projects for leading tech companies
- Supportive global community
*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.
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