Deutsche Telekom IT Solutions Slovakia
Information Technology
SeniorSoftwareDeveloper(JavaApplicationDeveloper)(m/f/d)
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“Senior Software Developer (Java Application Developer) (m/f/d) at Deutsche Telekom IT Solutions Slovakia. Skills: Java, Microservices, Cloud-native, Kafka. Develop new applications. Maintain existing applications”
What You'll Achieve.
improve and continuously transform; support automation and transformation; process millions of events daily; modernizing core Telekom systems; improving scalability and performance
Industry & Context.
analytical thinking; problem-solving skills; troubleshooting; bug fixing; performance optimization; root cause analysis
What They're Looking For.
Must Have
Education in Information Technology, at least 5 years of experience in software development, Java backend development (advanced level), Solid understanding of software architecture and system design, Good overview of IT systems, infrastructure, and application landscape, Experience with modern development methodologies, version control systems (e. g. , Git), build tools and development environments, bug tracking and collaboration tools, Experience with microservices architecture, APIs, and distributed systems, Familiarity with databases, application servers, and middleware, Basic knowledge of UML or similar modeling approaches, analytical thinking and problem-solving skills, Good communication skills and ability to work in a team, English – Upper intermediate (B2)
Nice to Have
Agile
What You'll Do.
Develop new applications
Maintain existing applications
Design scalable applications
Develop backend applications
Develop microservices
Migrate business logic
Implement event-driven communication
Propose architecture solutions
Estimate development effort
Support delivery planning
Develop high-quality code
Participate in CI/CD pipelines
Support application operation
Create technical documentation
Perform root cause analysis
Mentor junior developers
How You'll Work.
Team & Collaboration
Collaborate with stakeholders; Work as part of a project team; Act as a senior team member; Share knowledge within the team
Communication Scope
Good communication skills; English – Upper intermediate (B2)
Process & Methodology
Estimate development effort, Plan implementation, Support delivery planning
Full Job Description
Our brand Deutsche Telekom IT Solutions Slovakia entered the life of Košice region in 2006 under the name of T-Systems Slovakia and ever since has been inextricably linked with the region when became one of the founding members of Košice IT Valley. We have managed to grow from scratch to the second largest employer in the eastern part of the country with more than 3900 employees. Our goal is to proactively find new ways to improve and continuously transform into the type of company providing innovative information and communication technology services. PURPOSE Develops new and maintains existing applications using modern technologies (primarily Java) based on requirements of internal or external customers. These applications support automation and transformation of business-critical processes within the Telekom domain. Works independently or as part of a project team on designing, developing, and building mid-size to complex, scalable applications in a cloud-native, microservices-based environment. As part of the role, actively contributes to the migration of business logic from a legacy billing system (one of the top 100 most critical Telekom applications) into a modern streaming platform built on Quarkus and Kafka, designed to process millions of events daily. TEAM AND PROJECT DESCRIPTION As part of a team of experienced senior developers, you will contribute to our initiative focused on migrating business logic from a legacy billing system, currently one of the top 100 most critical Telekom applications into a modern Quarkus-based streaming platform. The new solution is built on a microservice architecture, with services communicating via Kafka, and is designed to process millions of events daily. This transformation plays a key role in modernizing core Telekom systems and improving scalability and performance. WHAT WILL YOU DO? * Collaborate with stakeholders (business, product, architects) to understand requirements and translate them into scalable technical so
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