Application Developer Jobs

Job Description

As T-NAP, we provide a centralized platform for end-to-end network automation within Deutsche Telekom, enabling the transition to software-defined, cloud-based, and disaggregated network architectures. Originating from the MOVE-ON program, we bring together expertise from DT Technik, VTI, and Telekom IT to drive true IT/NT convergence.

Our platform is built on ONAP and leverages modern technologies such as microservices, cloud-native architectures, and open APIs. It enables scalable orchestration of network services, supports innovations like NFV and O-RAN, and reduces dependency on traditional vendors.

Working within an agile setup as part of an Agile Release Train, our teams deliver impactful solutions that shape the future of telecom networks.

As a Full Stack Developer within the T-NAP Digital Hub, you contribute to the design, development, and maintenance of scalable web applications for a cloud-native, containerized network automation platform. Using modern technologies and open-source solutions such as ONAP, you help deliver reliable, efficient software that supports network automation initiatives.

In an agile, multi-team environment (Scrum, SAFe), you collaborate with software engineers, DevOps engineers, and network engineers to implement high-quality solutions, enhance platform capabilities, and continuously improve development processes. You actively participate in technical discussions, expand your expertise, and contribute to the successful delivery of both business and technical objectives.

Purpose

Develops new and maintain existing source code of based applications in programming language like Java, ASP.Net or C# based on requirements of internal or external customers. These applications support usually automation of business processes.

Works independently or in project team on developing and building application for customer usage

Does not necessarily require senior developer’s support , can handle all phases of software development lifecycle by himself, especially for small or midsize applications. For junior developers serves as basic mentor.

WHAT WILL YOU DO?

• Develop and maintain web applications for a cloud-native, containerized network automation platform (T-NAP)
• Implement business and technical requirements into reliable, maintainable, and high-quality software solutions
• Collaborate in an agile, multi-team environment (Scrum, SAFe) with software, DevOps, and network engineering teams
• Contribute to application development, testing, deployment, and ongoing platform enhancements
• Support CI/CD processes and help automate application and infrastructure deployment activities
• Assist in ensuring platform performance, reliability, and scalability through testing, monitoring, and optimization
• Participate in troubleshooting, fault analysis, and resolution of technical issues
• Engage in technical discussions, knowledge sharing, and continuous learning within the team
• Follow development best practices, coding standards, and quality assurance processes
• Contribute to the continuous improvement of platform components, tools, and development workflows

Qualifications

YOU WILL SUCCEED IF YOU:

• Have strong hands-on experience in backend development with Java and Spring Boot (including reactive/WebFlux) and solid frontend skills in Angular (TypeScript/JavaScript)
• Possess deep understanding of RESTful web services, JSON, and API design standards such as OpenAPI/Swagger
• Are experienced with modern DevOps and cloud-native tools, including Docker, Kubernetes, and web servers like NGINX, Keycloak, or Traefik
• Have advanced experience with database development (PostgreSQL..)
• Thrive in agile environments (Scrum/SAFe) and are comfortable working in distributed, multi-team setups
• Quickly adapt to new technologies and problem domains, demonstrating strong analytical thinking and a solution-oriented mindset
• Act as a supportive and collaborative team player, proactively sharing knowledge and mentoring less experienced colleagues
• Bring curiosity for telecom and network automation domains; experience with ONAP is a plus

Additional Information

WHY SHOULD YOU CHOOSE US?

We believe in balance between work and personal life. An attractive and extensive work-life balance portfolio guarantees lasting motivation for employees and thus a better quality of life, promotes physical and mental well-being and contributes to a positive work environment. All this with the aim of providing more freedom in reconciling work, career growth, private life and individual lifestyle. Therefore we offer to our employees over 25 different benefits to improve their personal and professional life in these areas:

• Financial benefits
• Benefits with focus on learning and development
• Benefits with focus on health and sport
• Benefits with focus on family and work – life balance
• Other benefits

For more information about our benefits click to Benefits

Salary

Final salary is negotiable.

We are offering base salary depending on seniority level and previous experience of candidate. In addition to base salary we provide variable part and other financial benefits. Base salary will not be lower than 2000 € /brutto.

Additional information

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