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