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

Deutsche Glasfaser Holding GmbH

Saarlouis, Saarland, Deutschland
Published Oct 21, 2025
Full-time
Permanent

Job Summary

This Lead Developer role centers on the conception, development, and operation of high-performance, scalable Java-based backend services and APIs. The professional will actively contribute to architectural and design decisions, ensuring systems adhere to cloud-native principles, resilience, and maintainability. A key responsibility is guaranteeing high software quality through rigorous testing (Unit, Integration, E2E), code reviews, and implementing robust Observability practices, utilizing tools like OpenTelemetry. The position involves maintaining and enhancing CI/CD pipelines, specifically using technologies like GitHub Actions, to ensure efficient and reliable deployments. Candidates must possess multi-year expertise in modern Java development (Spring Boot/Quarkus), deep knowledge of relational and multimodal databases, and experience with containerization technologies like Kubernetes and message brokers such as Kafka. This role offers an opportunity to work collaboratively within an agile team, focusing on performance optimization and continuous technological advancement within a stable utility provider environment, supported by flexible work arrangements and extensive benefits.

Required Skills

Education

Degree in (Business) Informatics, Information Technology, or comparable qualification; alternatively, a technical apprenticeship combined with multi-year experience in backend development.

Experience

  • Multi-year expertise in modern Java backend development (Spring Boot and/or Quarkus)
  • Professional experience in backend development (required if technical apprenticeship is substituted for degree)
  • Deep knowledge in relational and multimodal databases (MySQL, PostgreSQL, MS SQL Server)
  • Experience with testing strategies, CI/CD processes, and Observability concepts
  • Experience handling Message Brokers (Kafka or Cloud Messaging services)

Languages

German (Fluent)English (Fluent)

Additional

  • Contractual title is Application Owner; Strong communication skills and team orientation; Independent and self-responsible work ethic.