Senior Python Systems Developer - Functional Testing Project at Mindrift

Berlin, , Germany -

Full Time

Start Date

Immediate

Expiry Date

28 Jun, 26

Salary

50.0

Posted On

30 Mar, 26

Experience

5 year(s) or above

Remote Job

Yes

Telecommute

Yes

Sponsor Visa

Skills

Python, Functional Testing, Linux, Docker, Pytest, Bash Scripting, LLMs, Code Reading, Black Box Testing, CLI Tools, Code Coverage, Packaging, Git Submodules, Dagger, Codespaces, Agent Evaluation

Industry

technology;Information and Internet

Description

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) Each project has its own compensation level based on scope and expertise required. On this project, AI trainers earn up to $50 per hour equivalent. Opportunity to contribute to innovative AI projects for leading tech companies Supportive global community

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Responsibilities

The role involves creating functional black box tests for large codebases in various source languages and managing Docker environments to ensure reproducible builds and test execution. Responsibilities also include monitoring code coverage, configuring automated scoring, and leveraging LLMs to accelerate development cycles.