Senior Full-stack Python Engineer (m/f/d) - Network Planning

About this role

<p><span style="font-size: 12pt;"><span data-contrast="none">At Flix, we offer a tech-driven environment where innovation meets real-world impact, with competitive pay,&nbsp;strong growth&nbsp;opportunities, and a culture of collaboration and ownership.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335551550":1,"335551620":1,"335559738":0,"335559739":281}">&nbsp;</span></span></p> <p><span style="font-size: 12pt;"><span data-contrast="none">We're&nbsp;looking for an experienced&nbsp;</span><strong><span data-contrast="none">Senior Full-stack Python Engineer (m/f/d)</span></strong><span data-contrast="none">&nbsp;to join&nbsp;our Supply Division.&nbsp;You'll&nbsp;make&nbsp;an impact by&nbsp;taking&nbsp;ownership of core backend systems that power our network planning optimization product. Your work&nbsp;will&nbsp;directly support&nbsp;network planners in scheduling vehicles, drivers, and timetables — improving travel experiences for millions of passengers while driving profitability.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":180,"335559739":0}">&nbsp;</span></span></p> <p><span style="font-size: 12pt;"><span data-contrast="none">Our team builds and&nbsp;maintains&nbsp;an optimization platform addressing use cases from vehicle and driver scheduling to timetable optimization. We follow modern system design — Domain-Driven Design, Hexagonal Architecture, and SOLID principles — with strict architectural boundaries enforced by tooling. Our backend workloads (APIs, event consumers, Kubernetes jobs) are built to scale with high code quality standards.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":180,"335559739":0}">&nbsp;</span></span></p> <p><span style="font-size: 12pt;"><span data-contrast="none">The product's algorithm engine is developed by Operations Research Engineers using mathematical optimization. As a Senior Python Engineer, you will own the engineering shell around these algorithms: the APIs, use cases, data pipelines, infrastructure, and the domain models that connect optimization output to the rest of the system.</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":180,"335559739":0}">&nbsp;</span></span></p> <p><span style="font-size: 12pt;"><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":180,"335559739":0}"><span data-teams="true">You'll collaborate closely with other engineering teams to design and implement the interfaces and contracts that connect our platform to the wider system landscape.</span></span></span></p> <p><span style="font-size: 12pt;"><strong><span data-contrast="none">Our current tech stack and toolset include:</span></strong><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":180,"335559739":0}">&nbsp;</span></span></p> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">Python, TypeScript, Shell scripting</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">Flask, React,&nbsp;Pytest</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">PostgreSQL, Confluent Kafka,&nbsp;DataDog</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> <li style="font-size: 12pt;"><span data-teams="true">AWS tools, Terraform</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">GitLab, Kubernetes, Docker, Azure AD</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> </ul> <p><span style="font-size: 24pt;"><strong data-renderer-mark="true">About the Role</strong></span></p> <ul> <li style="font-size: 12pt;"><span style="font-size: 12pt;" data-contrast="none">Own and evolve the backend: APIs, use case layer, domain models, serialization, and event-driven pipelines (Kafka)</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;" data-contrast="none">Take engineering ownership of new product modules — designing the architectural scaffold, wiring layers, and ensuring clean boundaries</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">Build and maintain infrastructure: Kubernetes deployments, CI/CD pipelines, and cloud resources (AWS)</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;" data-contrast="none">Collaborate closely with Operations Research Engineers to integrate optimization algorithms into the product</span></li> <li><span style="font-size: 12pt;" data-contrast="none">Work in an AI-augmented development workflow — actively using code agents and AI assistants as a natural part of how you ship software</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;"><span data-contrast="none">Contribute to architecture decisions and uphold code quality through reviews, testing, and continuous improvement</span><span data-ccp-props="{"134233117":false,"134233118":false,"335557856":16777215,"335559738":240,"335559739":240}">&nbsp;</span></span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;" data-contrast="none">Write well-tested, self-documenting code following hexagonal architecture patterns</span></li> <li style="font-size: 12pt;"><span style="font-size: 12pt;" data-contr