At IONOS, the leading European provider of cloud infrastructure, cloud services and hosting services, you will work together with a wide range of teams. We are characterized by open structures, a friendly working culture and flat hierarchies with a strong team spirit. We firmly believe that work and fun are compatible, and offer you the right environment for this. Our constant growth means that we are always looking for new colleagues. Become part of IONOS and grow with us. IONOS is creating Europe's leading data-sovereign cloud, offering businesses a secure and reliable alternative. We're looking for a passionate software engineer to join our Big Data Products Cloud team and help us build the powerful data platforms our customers love. This is a senior role for someone who loves to code and solve complex challenges. As a Staff Engineer at IONOS, your influence goes beyond just writing code — you'll help shape our technical direction, mentor other engineers, and elevate the entire team. If you enjoy collaborating on tough problems and have a strong background in Go, we would love to talk to you. Tasks Collaborate on building our Big Data platform: You'll play a vital role in designing, developing, and operating our data analytics and streaming PaaS services. Write high-quality, scalable code in Go: Your work will serve as an example of best practices for building robust, cloud-native systems. Work deeply with Kubernetes: You'll use your experience to help us build and run our services, including the opportunity to design and implement custom Kubernetes operators and controllers. Solve interesting problems: From ensuring high availability to optimizing performance, you'll tackle the complex challenges inherent in distributed data systems. Help our customers succeed: You'll grow into a go-to person for our data services, guiding both internal and external teams on how to best use our platform. Mentor and learn: Share your knowledge with the team and continuously explore new technologies in the Big Data and cloud-native landscape. Qualifications Significant professional experience in software development, with a strong proficiency in writing, testing and deploying production-grade code in Go. We value your skill and expertise over a specific number of years. Solid experience with Kubernetes in a production environment. If you have experience or a strong interest in developing Kubernetes operators/controllers, that's a huge plus! A passion for building great products. Experience with Big Data technologies (like Kafka, Trino, Spark, etc.) is beneficial, but we believe a talented engineer can learn a new domain. A collaborative spirit and clear communication skills. You thrive in a team environment where ideas are shared openly. A calm and effective approach to troubleshooting. You are comfortable diagnosing and resolving issues in complex, live systems. Fluency in English is required. Fluency in German is an advantage. We believe that diverse teams build better products. Even if you don't meet every single point on this list, but you are excited about the role, we encourage you to apply! Benefits Hybrid working model. Flexible working hours through trust-based working hours. At some locations a subsidized canteen and various free drinks. Modern office space with very good transport connections. Various employee discounts for activities and products. Employee events such as summer and winter parties, as well as workshops. Numerous training and development opportunities. Various health offers, such as sports and health courses. About IONOS IONOS is the leading European digitalization partner for small and medium-sized businesses (SMB). The company serves around six million customers and operates across 18 markets in Europe and North America, with its services being accessible worldwide. With its Web Presence & Productivity portfolio, IONOS acts as a 'one-stop shop' for all digitalization needs: from domains and web hosting to classic website builders and do-it-yourself solutions, from e-commerce to online marketing tools. In addition, the company offers Cloud Solutions to enterprises who are looking to move to the cloud as their businesses evolve. We value diversity and welcome all applications - regardless of, for example, gender, nationality, ethnic or social origin, religion, disability, age as well as sexual orientation and identity, physical characteristics, marital status or any other irrelevant factor subject to applicable law.