Lead Developer, Java Backend & Observability | Lead Developer mit Fokus Java, APIs & Observability (w/m/d)

Deutsche Glasfaser Holding GmbH

Düsseldorf, Nordrhein-Westfalen, Deutschland
Published Oct 7, 2025
Full-time
Permanent

Job Summary

This Lead Developer role focuses on designing, developing, and operating high-performance, scalable, Java-based backend services and APIs. The position requires active contribution to architecture and design decisions, emphasizing cloud-native principles, maintainability, and resilience. A core responsibility is ensuring high software quality through rigorous testing (Unit, Integration, E2E), code reviews, and the implementation of robust Observability practices (e.g., OpenTelemetry). You will maintain and enhance CI/CD pipelines (like GitHub Actions) to ensure efficient deployments and utilize modern architectural patterns, including Event-Driven Designs, to create performant system landscapes. Key qualifications include extensive Java expertise, proficiency with relational and multimodal databases, and deep knowledge of container technologies like Kubernetes. This is an attractive opportunity for a communicative and team-oriented professional eager to shape future-proof systems and mentor less experienced colleagues within an agile environment.

Required Skills

Education

Completed degree in (Business) Informatics, Information Technology, or comparable technical qualification.

Experience

  • Several years of Java expertise in developing modern backend systems
  • Professional experience in backend development (as alternative to formal education)
  • Experience with Test strategies, CI/CD processes, and Observability concepts
  • Experience with API Designs in synchronous and asynchronous contexts
  • Experience with Message Brokers or Cloud Messaging services

Languages

German (Fluent)English (Fluent)

Additional

  • The contractual working title for this role is Application Owner.