Senior backend engineer

Our client in the Saa S sector based in Vienna offers an exciting opportunity for experienced backend experts who love modern technologies and want to design scalable architectures. They are looking for a passionate developer who not only writes code but also actively contributes to technological advancement.Your responsibilities:Develop and improve backend services : Build and maintain Saa S backends using Python, Django, Django REST Framework, and Fast API – complemented by modern technologies like Go, Java, or Nest JSApply architectural concepts : Use of Domain-Driven Design, modular monoliths (moduliths), microservices, and hexagonal architectureDesign event-driven systems : Implement asynchronous communication using Rabbit MQ or KafkaOptimize performance : Refactor existing systems, improve SQL queries in Postgre SQL, and ensure high-performing APIsEnsure code quality : Write clean, tested, and documented code; conduct code reviews and actively manage knowledge within the teamUse modern tools : Leverage AI coding assistants and automation to increase efficiencyCollaborate in an agile way : Work with colleagues from product, frontend, and QA in a Scrum/Kanban setupYour profile:Extensive experience : At least 10 years in backend development, solid knowledge of Python/Django, and experience with other backend languages or frameworks (e.g., Java, Go, Node.js/Nest JS)Architectural understanding : Confident in applying Domain-Driven Design, modular monoliths, microservices, and hexagonal architectureMessaging know-how : Hands-on experience with Rabbit MQ or Kafka in production environmentsAPI expertise : Experience in building and integrating RESTful APIs; knowledge of Fast API is a plusDatabase skills : Solid knowledge of Postgre SQL – from schema design to performance optimizationDev Ops mindset : Experience with Docker and Kubernetes is a plusAgile work style : Team player with excellent English skills; German is a plusCuriosity and willingness to learn : Openness to new tools, methods, and technologiesWhat you can expect:Contribute, not just participate : Become part of a company evolving from startup to enterprise solutionCutting-edge technologies : Work with current technologies and tools – directly in your daily projectsGrowth & development : Continuous learning through collaboration with an experienced management teamInternational environment : Collaborate with a globally oriented teamFlexible working : Hybrid work model with remote days and a Vienna-based officeLong-term perspective : Permanent full-time employment with attractive compensationJob Nr: 3273