Java backend developer in telecom

Do you have a strong Java Backend Developer background, passion for problem-solving, and want to join one of the largest tech companies in the Nordics? Then this is the role for you! We are looking for a Senior Java Backend Developer to join Tieto Tech Consulting to support the development and extension of COM5.Mobile, a mature network management and optimization platform used by major telecom operators. The role focuses on backend services, TM Forum APIs, and network-related data models, working with Micronova’s Product Development and Customer Value Teams.

• 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)
• Будет плюсом: Background in telecommunications or network management; Experience with TM Forum APIs (TMF‑633, TMF‑639 or similar); Understanding of OSS / BSS systems; Knowledge of 3GPP / 5G network concepts (slicing, NRM, gNBs, etc.); Experience working with network or radio-related data models; Kubernetes / cloud-native experience beyond basic usage

• Information about the salary range and the criteria used to determine remuneration will be shared with candidates prior to the interview process and confirmed before an offer is made.