python developer for network planning

Flix develops technology-driven mobility solutions that make travel smarter, more sustainable, and more affordable. Its network planning optimization product supports vehicle, driver, and timetable scheduling for millions of passengers.

• Own and evolve backend APIs, use case layers, domain models, serialization, and Kafka-based event-driven pipelines;
• Design architectural scaffolds, connect application layers, and maintain clean boundaries for new product modules;
• Build and maintain Kubernetes deployments, CI/CD pipelines, and AWS cloud resources;
• Integrate mathematical optimization algorithms into the product with Operations Research Engineers;
• Build AI capabilities by combining LLMs with the optimization engine;
• Use code agents and AI assistants in daily software development;
• Contribute to architecture decisions and maintain code quality through reviews, testing, and continuous improvement;
• Write well-tested, self-documenting code following hexagonal architecture patterns;
• Mentor colleagues and promote knowledge sharing and learning.

• Degree in Computer Science or equivalent background;
• 5+ Years of backend software engineering experience with Python;
• Experience with modern frontend technologies and basic frontend development;
• Production experience with clean architecture principles, including hexagonal architecture, ports-and-adapters, DDD, or similar approaches;
• Experience with PostgreSQL and event-driven systems such as Kafka;
• Strong experience using code agents or AI assistants in daily development;
• Experience with Docker, Kubernetes, and CI/CD pipelines;
• Familiarity with unit, integration, and acceptance testing;
• Experience with AWS or similar cloud platforms and Terraform;
• Nice to have: familiarity with mathematical optimization or data-intensive applications.

• Travel perks: 12 free Flix vouchers and 12 discount vouchers for friends and family;
• Work from another location for up to 60 days per year, depending on the role;
• Confidential 1:1 counselling, courses, and stress management for the employee and up to four family members;
• Language classes, training courses, and expert-led learning sessions;
• Mentoring program with experienced colleagues;
• Office-first hybrid work model with flexibility to balance work and life.