Senior Python Systems Developer - Functional Testing Project
On-site · Paris, Île-de-France, France or Lyon, Auvergne-Rhône-Alpes, France
Job Summary
Senior Python Systems Developer for a functional testing project. This remote, contract-based role involves creating functional black-box tests for large codebases in multiple languages, building and managing Docker environments to ensure 100% reproducible builds, monitoring code coverage and configuring automated scoring to meet industry benchmarks, and leveraging LLMs (Roo Code, Claude Code) to accelerate development cycles and improve code quality. The project is platform- and language-agnostic, requires strong Linux, Docker, and Python tooling skills, and offers flexible participation (20-30 hours/week) with compensation up to $50/hour equivalent.
Required Qualifications
- 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
- 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.
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