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

Tieto; Warszawa; Remote; PLN 220,000 - 320,000; Full time

Job summary

Tieto Tech Consulting is seeking a Senior Java Backend Developer to support the backend services for telecom network management. You will design and implement RESTful APIs, work with Java 21, Quarkus, and microservices, and collaborate with cross-functional teams in English.

You will handle databases like PostgreSQL and Oracle, ensure code quality with CI/CD and SonarQube, and participate in CI pipelines using Jenkins, Jira, and Confluence in a remote, international setting.

Qualifications

• 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).

Responsibilities

• Design and implement backend services for telecom network management solutions.
• Develop and extend TMF-compliant APIs (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.

Skills

Java backend

REST APIs

English (fluent)

SOA / microservices

SQL / relational DBs

Tools

Quarkus

Spring Boot

PostgreSQL

Oracle

Kubernetes

Jenkins

Git

SonarQube

Jira

Confluence

Job description

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

• Full-time
• Remote Type: Remote
• Job Area: Application and Product Development
• Business Unit: Tech Consulting

Do you have a strongJava 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 Developerto 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.

• Platform and tools: Kubernetes, Jenkins, Git, SonarQube, Jira, Confluence
• Architecture: Microservices and legacy monolith components; strong backend focus
• Frontend: React / TypeScript (minor exposure)

Responsibilities

• 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

Qualifications

• 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)

Would be an advantage

• 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.

At Tieto, we believe in the power of diversity, equity, and inclusion. We encourage applicants of all backgrounds, genders (m/f/d), and walks of life to join our team, as we believe that this fosters an inspiring workplace and fuels innovation.Our commitment to openness, trust, and diversity is at the heart of our mission to create digital futures that benefit businesses, societies, and humanity.
Diversity, equity and inclusion | Sustainability | Tieto