Software Architect - International Webportal (f/m/d)

Welcome to ista At ista, we support property owners and managers in making their buildings fit for the future and kind to the planet. That includes tracking and billing energy consumption in a way that’s easy to grasp, to help save energy and cut CO 2 emissions. With over 6,000 employees in more than 20 countries, we’re committed to making it happen. Join us and help shape tomorrow, secure in the knowledge that you’re part of a successful company that also offers you the flexibility of agile working practices. Everyone is welcome at ista, regardless of age, gender, background, sexual orientation, religion or disabilities. We’re proud to be part of a diverse team. Fostering a culture of team spirit and togetherness, we are always there for one another. We set great store by ensuring a healthy work- life balance for our people. Plus, we offer each and every employee the opportunity to pursue further training and personal development. Here\'s what you can look forward to Lead Architectural Vision: Drive the design and evolution of robust, scalable software solutions using Java (Spring Boot), Angular, Ionic, Kubernetes, and Azure Collaborate Across Domains: Partner with product owners, developers, and stakeholders to translate business needs into future- proof technical architecture Establish and Maintain Standards: Define and uphold architecture blueprints, code quality standards, and engineering best practices Technical Coaching & Leadership: Mentor developers, conduct architecture reviews, and encourage a strong engineering culture focused on shared ownership Own Non- Functional Qualities: Ensure solutions meet high standards for performance, security, maintainability, and cost- effectiveness Architect for the Cloud: Shape cloud- native applications with microservice principles, containerization, and platform automation on Azure Support Continuous Delivery: Work closely with DevOps engineers to enable automated CI/CD pipelines, fast feedback loops, and reliable deployment workflows Design Event- Driven Systems: Architect and guide the development of event- driven systems, leveraging NATS as a message broker (or comparable technologies like Kafka, RabbitMQ, etc.) to enable loose coupling, responsiveness, and scalability Tech Radar & Innovation: Evaluate emerging technologies and trends; bring forward new tools, patterns, or paradigms that drive product or engineering improvements Lifecycle Engagement: Take part in the full Software Development Lifecycle—from discovery and design to implementation and operations—with an eye on long- term sustainability What we require of you Proven experience (5+ years) as a Software Architect, with deep knowledge of Java (8+), Spring Framework, and modern microservices and event- driven architectures Academic Foundation: Degree in Computer Science, Software Engineering, or equivalent experience Architecture Expertise: Proven track record as a Software Architect or Lead Engineer building complex, distributed systems Strong Java & Spring Background: Deep experience with the Java ecosystem and Spring Boot. You\'re confident designing and implementing backend services at scale Modern Web Know- How: Working knowledge of Angular is a plus, but curiosity and a willingness to dive into the frontend stack is even better Cloud- Native Mindset: Solid experience with Kubernetes, container orchestration, and running services in Azure or similar cloud platforms API & Integration Design: Strong grasp of RESTful API design, microservices architecture, and asynchronous communication patterns DevOps Fluency: Comfortable working with CI/CD, GitOps, and infrastructure- as- code pipelines—close collaboration with DevOps is second nature to you Security & Performance Awareness: You incorporate non- functional requirements early in the design, not as an afterthought Soft Skills Matter: Excellent communication, empathy, and collaboration skills—you can align people without relying on hierarchy What we offer you Do the right thing with purpose and a future: our services save CO2 and protect the environment - we are working for a sustainable world of tomorrow Enjoy many benefits: Look forward to an attractive salary, 30 days\' holiday per year and flexible working hours, including the option of mobile working Secure good prospects: With us, a solid international medium- sized company meets a start- up atmosphere - our future course offers you long- term and excellent career options Stay curious and develop yourself further: standing still is not an option for us, which is why we support you in every aspect of your development - a variety of learning opportunities await you Experience a working environment full of trust: We all pull together Have fun in a motivated team: Whether it\'s a barbecue event, international soccer cup or ice cream for everyone in summer - we always come up with something new, so stay tuned!