Senior Python Systems Developer - Functional Testing Project

Mindrift; Deutschland; On-site; USD 56,826 - 80,934; Part time

Benefits offered by this job

Freelance project-based collaboration

Fully remote and flexible participation

Opportunity to contribute to innovative AI projects

Supportive global community

Job summary

Mindrift is looking for a Senior Python Developer to work on project-based AI opportunities, focusing on functional testing and Docker environments. Candidates should have over 5 years of experience in software engineering and strong skills in Python, Docker, and Linux. This role offers fully remote participation with flexibility in hours, compensating up to $50 per hour in a supportive global community contributing to innovative AI projects for leading tech companies.

Qualifications

• 5+ years of experience as a Software Engineer, primarily Python.
• Deep experience with pytest and functional tests for CLI tools.
• Expert-level Docker skills and strong Linux skills.

Responsibilities

• Create functional black box tests for large codebases in various languages.
• Manage Docker environments for reproducible builds and test execution.
• Monitor code coverage and configure scoring criteria.

Skills

Python

Functional testing

Docker

Linux

Bash scripting

LLMs usage

Tools

pytest

Docker

Git

Coverage tools

Job description

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

Requirements

• 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

Additional 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.

Benefits

• 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