Principal Java Software Engineer (m/f)

Osijek, Hrvatska

The DEKRA Arbeit Group, with its more than 140 locations throughout Europe, is one of the most successful and innovative umbrella organizations in the area of personnel services. We are a highly professional and ambitious company driven by talented and dedicated people who are committed in delivering all our services.

Our Client is Optiva, a leading global provider of cloud-native revenue management software for the telecommunications industry, covering the full lifecycle of telecom billing system experience. It has the most contemporary team of experts across the globe, on six continents.

It is servicing the world’s largest and most innovative telecom service providers using cutting-edge technologies. It provides solutions for optimization of financial operations and facilitates the work of numerous telecom companies. At Optiva, the strategic focus is advancing society's digital services.

Optiva’s company values are creativity, integrity, collaboration and accountability. If you are passionate about modern technologies development and want to develop your skills and competencies further, then we would very much like to hear from you.

At Optiva, they are looking for:

Principal Java Software Engineer (m/f)

Place of work: Osijek

 (remote, on-site or hybrid)

Job Role:

Working as part of a multi-disciplinary team, you will technically lead the design and implementation of highly scalable and reliable software solutions. As a Principal Software Engineer, you will use your experience to help grow and build high-performing teams through leadership and mentoring by working collaboratively to achieve goals. You will stay on the leading edge of development practices to drive efficiency through the lifecycle.


  • BSc or MSc degree in Computer Science, Engineering or equivalent
  • Minimum 10 years’ experience designing and developing distributed software solutions using Java or .NET
  • Experience working in an agile environment
  • Experience working with Cloud solutions and Containers
  • DB Knowledge (Oracle, MySQL, PostgreSQL, Redis, MongoD, Apache…)
  • Experience working with CICD / GIT / Jira / Jenkins
  • Excellent troubleshooting skills
  • Excellent OOP skills
  • Fluency in English (spoken and written) is mandatory

Other useful knowledge / experience:

  • Experience in Telecom solutions (Protocol Handlers, OSS, BSS, Billing, Charging, CDR Mediation)
  • Dynamics CRM experience
  • Knowledge of 3GPP standards, 3G, 4G Architecture and Technologies

The Client offers:

  • Working with other experts as part of international, global teams
  • Challenging and stimulating working environment
  • Excellent opportunity for personal and professional development
  • Possibility of advancement through dedication and efficiency
  • Freedom to innovate
  • Improving foreign language skills
  • Flexible working hours
  • Working on-site, remote or hybrid
  • Competitive compensation package

Principal Java Software Engineer (m/f)

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Principal Java Software Engineer (m/f)

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