Role Description We are looking for a Full-Stack Software Engineer with strong backend experience in Kotlin/Java and solid Frontend expertise. - You will work on products used by businesses across Western Europe. - Our team operates in a scaled agile approach across Europe with a headquarter in Bonn, Germany. - Responsible for the complete software development lifecycle; including ideation, implementation, and operation of secure IoT software operating smart buildings and smart homes across the world. Qualifications - Proficiency in Kotlin and/or Java for backend development - Strong experience with the Spring Boot framework - Experience with Docker and containerized applications - Familiarity with cloud platforms such as AWS, Azure, or Google Cloud - Experience in designing and consuming RESTful APIs - Knowledge of microservices architecture and patterns - Experience with on-premise and cloud-based deployments - Proficiency in secure coding practices and understanding of security best practices for backend systems - Familiarity with scalability strategies and performance optimization in backend services - Knowledge of monitoring and observability tools (e.g., Prometheus, Grafana, ELK) - Knowledge of cryptography and security - Familiarity with CI/CD processes, including GitHub Actions, GitLab CI, or similar tools - Experience with version control systems (e.g., Git) - Experience with database technologies, both relational (e.g., PostgreSQL) and NoSQL (e.g., MongoDB) - Strong experience with React.js or Angular, or Vue - Solid knowledge of TypeScript / JavaScript, HTML5, CSS3 - Experience with modern tools (Vite, Webpack, npm, etc.) - Understanding of state management (e.g., Redux) Requirements - Experience building desktop applications - Experience with Kotlin Multiplatform in production - Knowledge of the modern Kotlin ecosystem (Coroutines, Flow, Compose, Koin, Ktor) - Knowledge of additional programming languages - Experience with system architecture and distributed systems - Understanding of UI/UX design and performance optimization - Knowledge of building automation or access control systems Benefits - Great customer impact: the solutions you deliver will be used by thousands of large and small businesses - Ability to shape the product, working, and delivery process - Great team spirit and Team Events - Agile and innovative environment - Cutting-edge technologies - Working on the latest Hardware - Convenient office or co-working, depending on your location

• Administration and further development of complex Linux systems (SLES) • Operation of Linux-based geospatial and cadastral application systems • Implementation of best practices for operating system hardening • User, role and account management • Patch and lifecycle management • Securing system interfaces and components • Creation and maintenance of automations for recurring operational tasks (e.g., with Ansible and other existing tools) • Use of Git for version control of configuration and system changes • Support for standardized installation and update processes • Monitoring & operational reliability • Implementation and operation of monitoring solutions (Grafana, Icinga, Checkmk) • Analysis of system states, logs and performance metrics • Identification of operational and security risks and derivation of appropriate measures • Analysis, documentation & collaboration • Conducting system checks and technical analyses • Systematic technical and process-oriented documentation including risk assessments • Coordination with specialist departments, IT colleagues and external partners • Participation in regular meetings on operations, status and further development

• Ensure system reliability and quality: Develop and maintain high-quality code, prioritizing availability, security, data integrity, and prevention of recurring incidents. • Deliver value consistently: Build complete, tested features aligned with the product's real needs, balancing speed and technical robustness. • Make well-founded technical decisions: Evaluate trade-offs considering performance, maintainability, security, cost, and business impact, avoiding over-engineering. • Collaborate and unblock the team: Work collaboratively in code reviews, pair programming, and technical discussions, taking collective responsibility for the squad's results. • Co-create solutions with Product and Data: Contribute technically to scope definition, assessing feasibility, risks, and alternatives before development begins. • Contribute to architectural evolution: Identify technical debt, bottlenecks, and opportunities for structural improvement, actively participating in architecture evolution. • Adopt an AI-first mindset: Use AI tools to improve productivity and quality while retaining technical responsibility for decisions and architecture. • Communicate clearly and responsibly: Maintain transparency about deliveries, risks, and blockers, document relevant decisions, and ensure stakeholder alignment.

• Develop end-to-end features (backend and frontend) • Build and evolve REST APIs • Work with data modeling and query optimization • Integrate with external APIs (e.g., Plaid) • Ensure code quality, testing, and technical standards • Participate in architectural decisions