About the Company ALTEN Belgium is a leading consultancy company in the fields of Engineering, Life Science, and IT, where our people and clients are central. In our open and adaptable organization, we get the best out of our ambitious employees, enabling them to perform optimally. We achieve this by offering them the most challenging projects and opportunities to continuously acquire new expertise to boost their careers. This is facilitated through the ALTEN Academy and knowledge-sharing events. Together, all employees form a large network of expertise, even at an international level. This ensures optimal growth for our consultants and the best solutions for our customers. About the job We are looking for an experienced Python Developer to join our dynamic team in Liège. Beyond strong technical skills, this role includes leading and mentoring a team of 3 developers. You’ll be working on diverse projects, contributing both to back-end and front-end development. Your Responsibilities Design, develop, and maintain scalable Python applications Contribute to technical architecture and decision-making Lead and support a team of 3 developers, providing both technical and personal guidance Work closely with cross-functional teams (DevOps, QA, Product, etc.) Ensure code quality and best practices through code reviews Take part in the continuous improvement of our development processes Develop features on both the back-end and front-end, collaborating across the stack Your Profile At least 4 years of experience in Python development You have at least a Bac 3 Solid knowledge of Python frameworks (Django, Flask, FastAPI, etc.) Comfortable with both back-end and front-end technologies Strong leadership and mentoring abilities Familiarity with Agile methodologies (Scrum, Kanban…) Proficient in French or English (minimum B2 level) Independent, detail-oriented, and proactive