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Lead Python Developer (m/f/d)

Contract
Brussels, Belgium
28.05.2026

Experience


Minimum 8 years of professional experience in Python development, including hands-on delivery in production environments.

Core Responsibilities

  • Analyse and understand business and technical requirements, translating them into effective software solutions.
  • Design, validate, and implement robust, scalable, and maintainable solutions, with a focus on long-term architecture and operability.
  • Collaborate closely with the squad, product owner, and cross-functional teams to ensure technical alignment and predictable delivery.
  • Ensure high code quality through established best practices, automated testing, documentation, and continuous improvement.
  • Act as the technical/development lead for the squad:
  • Provide technical direction and architectural guidance
  • Review code and design decisions
  • Ensure alignment with agreed standards and target architecture
  • Mentor and support other developers in the team
  • Contribute to technical decision-making and take ownership of solution quality, performance, and reliability.

Technical Skills Required

  • Python (Expert level) – Strong mastery of Python fundamentals and advanced concepts.
  • FastAPI – Proven experience building RESTful APIs and microservices using FastAPI.
  • API Design – Ability to design clean, maintainable, secure, and well-documented HTTP REST APIs.
  • Terraform (Basics) – Understanding of Infrastructure as Code principles for simple deployments.
  • NoSQL Databases – Solid understanding of NoSQL concepts; experience with MongoDB is a plus.
  • Version Control – Git and branching strategies; experience with TFS / Azure DevOps is a plus.
  • Testing Frameworks – Pytest or equivalent frameworks for unit and integration testing.
  • CI/CD – Familiarity with pipeline tools such as GitHub Actions, Azure DevOps, or Jenkins.
  • Containerisation – Basic knowledge of Docker for packaging and deploying applications.
     

Nice-to-Have Skills

  • Knowledge of asynchronous programming and concurrency in Python.
  • Familiarity with security best practices for API-driven applications.
  • Exposure to Agile methodologies (Scrum, Kanban).
  • Cloud basics – Understanding of AWS, Azure, or GCP fundamentals.
     

Soft Skills

  • Strong analytical and problem-solving skills.
  • Excellent communication and collaboration abilities.
  • Ability to work independently and take ownership of technical outcomes.
  • Adaptability to changing requirements and priorities.
  • Leadership mindset – Capability to mentor, guide, and support others in a team-oriented environment.

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