About the role
As a Senior Software Engineer for our mobile app backend at idealo, you will drive the further development of our award-winning e-commerce apps. We enable millions of users to compare prices and make better purchasing decisions on their mobile devices. We are a fully integrated, autonomous team within the product development of our mobile apps, balancing proven technologies with innovative experiments to deliver outstanding user experiences and contribute to idealo’s mission. We take full responsibility for the operation, technical implementation, and direction of our services—and we’re looking for strong support to keep growing. About your new role End-to-End Ownership You develop and operate business and web services in the AWS Cloud. Together with your team, you are responsible for the entire lifecycle of your services (YBYO): architecture, infrastructure, development, testing, security, deployment, monitoring, on-call, and maintenance. You design and develop APIs (REST/GraphQL) for our mobile apps (Android & iOS). You ensure that our services are scalable, stable, and performant—even under high load (e.g., peak events). Technical Excellence You make architectural decisions for modern backend systems (e.g., microservices). You further develop our cloud infrastructure (e.g., using Terraform and Kubernetes). You ensure high software quality through testing, code reviews, and monitoring. You identify technical debt and drive its reduction. You introduce new technologies and tools and continuously improve our development processes (e.g., CI/CD, automation, AI tools). Collaboration & Impact You work closely with mobile engineers (iOS & Android) as well as backend colleagues. You actively contribute to technical discussions and challenge existing solutions. You share your knowledge within the team (e.g., through pair programming, code reviews, or tech talks). You explain complex technical topics in a clear and understandable way, even for non-technical stakeholders. You take responsibility within the team, e.g., in on-call rotations or during critical situations. Skills & Requirements Several years of experience in backend development (ideally ≥5 years with Kotlin/Java). Experience with cloud architectures, especially AWS. Experience with Infrastructure-as-Code (e.g., Terraform) and container technologies (e.g., Kubernetes). Experience in designing and operating APIs (RESTful and/or GraphQL). Knowledge of modern software architectures (e.g., microservices). Experience working with databases (NoSQL, ideally also relational). Fluent English skills. Nice-to-have Experience with high-performance backends for mobile apps. Experience using AI tools in daily development work. Good German skills. At idealo you can expect You want to further your education? We take your personal development goals seriously and, in addition to our idealo Learning Hub, eLearning offerings (e.g., Udemy), coaching & mediation, we also offer you the opportunit