Design and implement new services using Kotlin (Backend) and React (Frontend), Support the further development or redevelopment of existing legacy systems (PHP), Modernize critical business processes, including the migration of core services to a service-oriented architecture with Kotlin/Spring Boot, Shape the architecture, API landscape, and technical standards to develop scalable and sustainable solutions, Ensure clean code, testability, and maintainability, conduct code reviews, and promote best practices within the team, Collaborate closely with stakeholders such as the CTO, Tech Lead, Product Owner, etc., Actively participate in agile processes, Support as well as coach your team members