Senior Python Systems Developer - Functional Testing Project

Mindrift; Barcelona; Presencial; EUR 29.126 - 41.483; A tiempo parcial

Ventajas ofrecidas por este puesto de trabajo

Freelance project-based collaboration

Fully remote and flexible

Up to $30 per hour

Innovative AI projects

Supportive global community

Descripción de la vacante

Mindrift is seeking a Senior Python Developer in Barcelona to join a remote, flexible project-based collaboration. The role involves creating functional tests, managing Docker environments, and leveraging AI tools for development efficiency. Candidates should have over 5 years of experience in Python, deep knowledge of pytest, and expert-level Docker skills. The project offers compensation of up to $30 per hour, with opportunities to contribute to innovative AI projects.

Formación

• 5+ years of experience primarily in Python software development.
• Deep experience with pytest and designing black-box functional tests.
• Expert-level skills in Docker for reproducible builds.

Responsabilidades

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

Conocimientos

Python

Docker

Linux

Bash scripting

pytest

LLMs (Claude Code, Roo Code)

C/C++/Rust/Go (reading)

Herramientas

Git

Dagger

GitHub Codespaces

coverage.py

Descripción del empleo

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 many coding languages with LLMs (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 $30 per hour equivalent.
• Opportunity to contribute to innovative AI projects for leading tech companies.
• Supportive global community.