I

IONOS

Backend Developer Java Intern

Backend EngineeringConfirmed live in the last 24 hours
InternshipRegensburg, GermanyNo salary listed

About the Job

Requirements

  • Be enrolled in a computer-science-related degree program, such as computer science, business informatics, or media informatics, and able to work alongside studies.
  • Have backend experience with Java and Spring or Spring Boot, confidently use relational databases, and have basic knowledge of REST or web services.
  • Have basic Git knowledge and an interest in working with GitLab, Docker, Kubernetes, and CI/CD.
  • Be curious about using AI tools in daily development and critically assess their output.
  • Work in a structured, goal-oriented, and independent manner.
  • Have very good written and spoken German and English skills.

Responsibilities

  • Develop and extend scalable microservices with Java and Spring Boot, and occasionally PHP, for domain, server, and certificate management, including integration of external APIs.
  • Write unit and integration tests, review merge requests, and contribute to CI/CD pipelines using GitLab and Kubernetes.
  • Analyze errors using logs and databases and resolve their root causes sustainably.
  • Contribute to functional and technical improvements, such as regulatory requirements, billing, monitoring, and stability.
  • Use and help shape modern AI tools in daily workflows, such as AI coding assistants for refactoring, testing, code reviews, and developing AI agents.

Desired Qualifications

  • Knowledge of Kafka, Elasticsearch, microservice architecture, or database optimization.
  • Initial exposure to DNS or domain administration.

About the Company

Company size
1,001-5,000
Company stage
IPO
Headquarters
Montabaur, Germany
Founded
1988

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