Senior Python Systems Developer - Functional Testing Project
$166,400–$166,400 year
On-site · Arizona, United States or Iowa, United States
Job Summary
Senior Python Systems Developer for a project-based functional testing role. Responsibilities include creating functional black box tests for large codebases across multiple source languages, managing Docker environments to ensure reproducible builds and test execution across platforms, monitoring code coverage and configuring automated scoring to meet industry benchmarks, and leveraging LLMs (Roo Code, Claude) to accelerate development cycles and improve code quality. Requirements include 5+ years of Python software engineering experience, strong pytest usage, expert Docker skills, Linux and Bash scripting, modern Python tooling, ability to read multiple languages (C, C++, Rust, Go), experience with LLMs to speed up test-case generation, and English proficiency at B2 or higher. Remote, freelance project-based collaboration with up to 20-30 hours per week and compensation up to $80/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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