Full-Stack Developer (REF4999W)

Deutsche Telekom IT Solutions is seeking a Full-Stack Developer to strengthen its team. The role involves backend development with Spring-based enterprise applications, integration with internal and external systems, and occasional frontend work. The ideal candidate should have strong Java knowledge, experience with Spring Security and Spring Data, and a solid understanding of system design principles and secure coding practices.

Requirements

• Deep knowledge of Spring Core
• Strong experience with Spring Security
• Solid expertise with Spring Data and relational databases
• Extensive experience designing and implementing REST and SOAP services
• Strong Java knowledge (Java 11+)
• System design skills
• Knowledge of core design patterns and architectural principles
• Experience designing scalable, secure enterprise systems
• Ability to analyze trade-offs and propose sustainable technical solutions
• Real production experience maintaining enterprise applications
• Ability to investigate complex production issues
• Experience with monitoring and metrics tools (e.g., ELK, Grafana)
• Understanding of performance tuning and troubleshooting under load
• Hands-on experience with Docker
• Experience deploying applications to Kubernetes
• Familiarity with GitLab CI/CD pipelines
• Understanding of deployment strategies and environment configuration
• Strong understanding of secure coding practices
• Awareness of OWASP recommendations (e.g., OWASP Top 10)
• Experience implementing secure authentication and authorization flows
• Understanding of common web vulnerabilities and mitigation strategies

Benefits

• Health insurance
• Retirement plan
• Generous paid time off
• Tuition reimbursement