Senior Java Backend Developer - Tieto Tech Consulting (m/f/d)

Senior Java Backend Developer role at Tieto Tech Consulting, focusing on backend services for telecom network management platform COM5.Mobile, using Java 21, Quarkus, PostgreSQL, Oracle, and Kubernetes.

• Design and implement backend services for telecom network management solutions
• Develop and extend TMF-compliant APIs (e.g. TMF‑633, TMF‑639)
• Implement resource inventory and service catalog exposure for external systems
• Work with complex network and OSS data models (slicing, network resources, configuration data)
• Develop microservices using Java 21 and Quarkus
• Integrate services with PostgreSQL and Oracle databases
• Support audit and optimization use cases (e.g. slicing audits, discrepancy detection)
• Ensure code quality through unit tests, CI pipelines, and SonarQube
• Collaborate within cross-functional teams using Jira and Confluence
• Communicate in English with product owners, architects, and project leads

• 5+ years professional experience in Java backend development
• Strong experience with REST APIs and service-oriented architectures
• Solid knowledge of SQL and relational databases
• Experience with modern Java frameworks (Quarkus, Spring Boot, similar)
• Familiarity with CI/CD pipelines and code quality tools
• Comfortable working in existing product codebases, not greenfield only
• Fluent English (written and spoken)