Senior Backend Engineer (m/f/d) – Kotlin/Spring Boot/AWS
On-siteBerlin, State of Berlin, Germany
Berlin, State of Berlin, GermanyOn-siteFull TimeMid LevelEnterprise
Full TimeMid LevelEnterprise
Job Summary
Take end-to-end ownership of backend services powering mobile news apps, architecting robust solutions in Kotlin, Spring Boot, and AWS. Optimize monitoring, logging, and metrics to ensure service reliability, while developing clean APIs and deploying workloads on Kubernetes. Mentor cross-functional team members on backend topics and collaborate with the MaPS platform team to maintain developer-friendly infrastructure. Shape technical vision and align architecture decisions to drive product impact. Join a fast-moving team at Axel Springer, a digital-first media company empowering free decisions through trusted journalism.
Required Qualifications
- at least five years of hands-on experience as a backend or software engineer, ideally in JVM-based backend systems
- fluent in Kotlin and experienced with Spring Boot, having built and operated production-grade backend services
- solid track record working with AWS cloud technologies (including Lambda and container-based workloads), plus familiarity with cloud-native patterns like IAM, S3, and messaging services
- interested in Kubernetes, understanding concepts like deployments, observability, and containerized workloads
- strong commitment to code quality, maintainable architectures, testing and long-term system ownership
- enthusiasm for monitoring, transparency, and building systems that are easy to operate
- proven strength in mentoring colleagues, building cross-team relationships, and actively promoting knowledge sharing in diverse environments
- strong communicator who translates complex technical topics for product managers, designers, and fellow engineers
- open to trying new things
- confident, driven and clever
- 80% office presence and 20% mobile working
- permanent full- or part-time position in a modern office in the heart of Berlin
Desired Qualifications
- broaden your skill set by exploring Android or iOS development and gaining insight into the full product vertical
- play a key role in shaping technical vision, aligning architecture decisions, and continuously improving processes for greater product impact
- act as a mentor and sparring partner for Android and cross-functional team members on backend topics to boost collaboration and knowledge sharing
- take end-to-end ownership of our backend services to deliver scalable, reliable systems powering our mobile experience
- architect and implement robust backend solutions with Kotlin, Spring Boot, AWS, and Kotlin-based AWS Lambdas ensuring long-term performance and maintainability
- ensure reliability and operability of your backend services by optimizing monitoring, logging, metrics, alarming, and overall service health
- collaborate with our MaPS platform team to deploy and operate workloads on Kubernetes using modern, developer-friendly infrastructure
- develop and document clean, efficient APIs for seamless integration with other teams and products across our ecosystem
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