T-Mobile
Java Developer (m/f/d)
Skills
3 days ago
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Important information
Location:
Košice, Czechia
Work mode:
Onsite
Published on:
16 October 2026
What they need
Job ID: 744000128983124
Java Developer (m/f/d)
Košice
Professional
Regular
Deutsche Telekom IT and Telecommunications Slovakia
Your Task
As a Backend Developer, you will be responsible for developing and maintaining microservice applications using the Java, Spring framework and Camel. The microservices are event driven or driven by Camunda BPMN workflow from top point of view. You will create high-quality business-oriented applications, which focus on collecting attributes of mobile network equipment required for certification and commissioning of physical network environment. You will closely cooperate with solution designer and business owners of solution. This role demands a comprehensive understanding of Java, Spring framework, REST practices and requires a proactive approach to problem-solving, a keen eye for detail, and a commitment to staying updated with the latest industry trends and best practices.
Responsibilities
- Design, develop, and maintain complex microservices using one of above mentioned frameworks
- Ensure code quality and maintainability by conducting code reviews and writing unit tests
- Participate in daily stand-ups, sprint planning, and retrospective meetings
- Identify and resolve performance bottlenecks to ensure the application runs efficiently
- Optimize application for maximum speed and scalability
- Provide technical guidance and mentorship
- Lead code reviews and ensure adherence to best practices and coding standards
- Create and maintain technical documentation for reference and reporting purposes
- Update technical documentation
- Share regular progress reports and updates
Your Profile
We are seeking a Backend Developer with extensive Java and Spring Boot experience to develop and maintain microservice applications. The ideal candidate should have strong technical skills in enterprise application development, comprehensive understanding of REST practices, database technologies, and excellent problem-solving abilities.
Must Have Skills
- Experience in Java programming
- Experience in Spring Boot framework
- Understanding of RESTful APIs and integration
- Experience with SQL databases
- Experience with NoSQL databases
- Experience with version control systems
- Problem-solving skills
- Attention to detail
- Strong communication abilities
- Strong teamwork abilities
- Bachelor's degree or Master's degree in Information Technologies
- Minimum 5 years of experience in the development of complex solutions
- Experience within the field of application programming in object-oriented programming languages
- Experience with agile software development methodology (e.g., Scrum)
- Advanced level in Programming
- Advanced level in HW/SW Overview
- Advanced level in General IT Overview
- Analytical thinking skills
- Team Cooperation skills
- English language proficiency at least B2 level
Nice to Have Skills
- At least a basic understanding of Apache Camel
- At least a basic understanding of Camunda
- Frontend development experience with Angular
- Frontend development experience with React
- Experience with any testing tool or framework
- Experience with Kubernetes
- Experience with Docker
- Experience with Microservices architecture
- Experience with Git
- Experience with cloud technologies (AWS, Azure, Google)
- Experience with Grafana
- German language proficiency
About Us
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.
Benefits
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
Compensation
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 €2,000 /brutto.
Additional Details
Please be informed that our remote working possibility is only available within Slovakia due to European taxation regulation.
Job Benefits
Financial
- Base salary not lower than €2000/brutto
- Variable compensation component
- Additional financial benefits
Work-Life Balance
- Remote working possibility (within Slovakia)
- Attractive and extensive work-life balance portfolio
Professional Development
Over 25 different benefits with focus on learning and development
Lifestyle & Wellness
Over 25 different benefits with focus on health and sport
Family Support
Benefits with focus on family and work-life balance
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