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Lead Python Engineer - Brussels or Paris


Job Title: Lead Python Engineer Duration: 9 months + possible extensions Location: Brussels or Paris Hybrid: 8 onsite days per month Start Date: ASAP We’re currently looking for a Lead Python Engineer to join an international engineering environment focused on modern backend development, scalable APIs, and high-quality software delivery. This is a senior-level role for someone who enjoys being hands-on technically while also helping drive architecture decisions, engineering standards, and technical direction within the team. You’ll be working closely with developers, product owners, and cross-functional teams to build reliable, scalable, and maintainable backend solutions in a cloud-based environment. Responsibilities • Develop and maintain backend services using Python and FastAPI • Design scalable REST APIs and microservices • Contribute to architecture and technical design decisions • Support code reviews, mentoring, and engineering best practices • Work with CI/CD pipelines, testing frameworks, and containerised applications • Collaborate with technical and business stakeholders across the project Requirements • 8+ years of professional Python development experience • Strong FastAPI and REST API development experience • Experience building scalable backend systems in production environments • Strong understanding of testing frameworks such as Pytest • Experience with Docker, Git, and CI/CD environments • Knowledge of NoSQL databases (MongoDB is a plus) • Previous experience in technical leadership or mentoring roles Nice to Have • Async programming / concurrency in Python • Terraform or Infrastructure as Code exposure • Cloud platform exposure (AWS, Azure, or GCP) • Agile / Scrum experience

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