Deutsche Telekom IT Solutions logo
Deutsche Telekom IT Solutions

As Hungary’s most attractive employer in 2025 (according to Randstad’s representative survey), Deutsche Telekom IT Solutions is a subsidiary of the Deutsche Telekom Group. The company provides a wide portfolio of IT and telecommunications services with more than 5300 employees. We have hundreds of large customers, corporations in Germany and in other European countries. DT-ITS received the Best in Educational Cooperation award from HIPA in 2019, acknowledged as the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.

Developer – Billing Systems

Systems EngineerSystems EngineerFull TimeRemoteMid LevelTeam 5,001-10,000

Location

Hungary

Posted

1 day ago

Salary

0

Seniority

Mid Level

Job Description

Developer – Billing Systems

Deutsche Telekom IT Solutions

Role Description Join a team responsible for one of the most business-critical areas within Deutsche Telekom's international group: billing systems. We deliver accurate, reliable, and flexibly configurable billing for fixed-line and mobile networks as well as mobile service providers — serving millions of customers. We're actively working to merge fixed-line and mobile billing into a single, modern platform, while gradually retiring legacy systems. That means you won't be maintaining a static, "legacy-only" system — you'll be part of a continuously evolving architecture undergoing real modernization. Your responsibilities will include: - Developing and maintaining microservices (REST APIs and UI components) - UI development using the Vaadin (Java) framework - Writing automated tests (JUnit, Cucumber/Gherkin, Robot Framework) - Building and optimizing CI/CD pipelines in GitLab - Deploying and running Docker containers on Kubernetes / OpenShift - Ensuring reliable communication between services and integrations - Writing custom scripts for database synchronization (MongoDB) - Creating technical documentation and knowledge resources Qualifications - Experience with Java / Spring Boot backend development - Familiarity with our tech stack: Java, Spring Boot, MongoDB, Oracle DB, Shell, Maven - Experience with tools such as GitLab, Jira, Grafana, Kibana, VSCode / IntelliJ, MongoDB Compass, Postman (or equivalent), SQL Developer - Business-level proficiency in English - German is not required Requirements - Work on a large-scale system modernization project within an international corporate environment - A modern, cloud-native tech stack (Kubernetes/OpenShift) - Production-grade, business-critical systems with real impact on customer experience - A collaborative, agile team culture - Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation. Company Description The largest ICT employer in Hungary, Deutsche Telekom IT Solutions (formerly IT-Services Hungary, ITSH) is a subsidiary of the Deutsche Telekom Group. Established in 2006, the company provides a wide portfolio of IT and telecommunications services with more than 5000 employees. ITSH was awarded with the Best in Educational Cooperation prize by HIPA in 2019, acknowledged as one of the most attractive workplaces by PwC Hungary’s independent survey in 2021 and rewarded with the title of the Most Ethical Multinational Company in 2019. The company continuously develops its four sites in Budapest, Debrecen, Pécs and Szeged and is looking for skilled IT professionals to join its team.

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