Senior Backend Developer

Company Description

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 recieved the Best in Educational Cooperation award from HIPA in 2019, acknowledged as the 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.

Job Description

We – the Customer Correspondence Hub – are looking for a results-driven Senior Developer to drive the further development of our components and APIs within our DevOps team.

We serve as the central hub for creating customer correspondence, managing its distribution through various channels, and ensuring proper archiving afterward.

What we offer:

An exciting and challenging role in an experienced and highly motivated team.

If you're skilled in programming for archiving and document generation using Java/Spring (Boot), then you're the perfect fit for our DMS Team3.

As a Senior Backend Developer, you can expect the following exciting responsibilities:

• Development work in various legacy outbound components such as Outcor.
• Development of the REST G-API TMF-667 archiving interface.
• Design and implementation of RESTful APIs and integration of external interfaces.
• Java / Spring Boot development for an outbound interim solution (adapter for third-party layout software, e.g., RQT).
• Development for test automation and integration of new software using CI/CD tools.
• Experience in requirements management and analysis.
• Execution of DevOps activities such as monitoring, deployments, and bug fixing.
• Ensuring uninterrupted operation of developed software by continuously improving application monitoring.
• Performance optimization and ensuring stability, security, and scalability.
• Active contribution to DevOps processes and continuous delivery pipelines.
• Mentoring junior developers and supporting code reviews.

Qualifications

What you bring to the table:

• Several years of experience in backend development with Java and the Spring (Boot) framework (Senior level).
• Excellent knowledge of modern software architectures (microservices, event-driven architecture).
• Experience conducting code reviews and writing clean code.
• Several years of experience building and enhancing GitLab build/deployment pipelines.
• Several years of experience with Docker, Kubernetes, and HELM.
• Several years of experience with cloud environments.
• Ability to familiarize yourself with source code independently (reverse engineering).
• Strong communication skills in English.

Additional advantageous knowledge:

• Logging & monitoring tools such as Graylog and Grafana.
• Providing and evaluating metrics using Prometheus.
• Databases like PostgreSQL, MySQL, MariaDB, or MongoDB.
• Several years of experience with agile international teams (working with SAFe and Scrum).
• A team player with a strong quality mindset and a holistic perspective.
• DevOps mindset.
• Proficient in using Git, Kibana, Grafana, Jira, Confluence, and CI/CD tools (e.g., GitLab, Jenkins).
• German language skills.

Additional Information

In the Customer Correspondence & Channels Hub, various contact channels of our end customers are managed. Since customers like different ways to communicate with us, e.g. via messaging, phone call or email, we in the CCC Hub are continuously working on improving the customer experience of our end customers and how they get in touch.

• Please be informed that our remote working possibility is only available within Hungary due to European taxation regulation.