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Voice Core Engineer 2nd Line

Aggregate function:  Technology
Business Area:  VT Network Operations
Posting Country:  Romania
Date Posted:  16 May 2025
Full Time / Part Time:  Full Time
Contract Type:  Permanent

At Vodafone, we’re working hard to build a better future. A more connected, inclusive and sustainable world. As a dynamic global community, it's our human spirit, together with technology, that empowers us to achieve this. 

We challenge and innovate in order to connect people, businesses, and communities across the world. Delighting our customers and earning their loyalty drive us, and we experiment, learn fast and get it done, together.

With us, you can be truly be yourself and belong, share inspiration, embrace new opportunities, thrive, and make a real difference.

Your day to day:

Preventive and corrective second level troubleshooting ensuring quality, continuity of service and the restoring time for Voice Core Network elements.  In collaboration with 1st Line Operations teams, work out procedures related to the analysis of alarms in order to detect and eliminate faults. Perform data configuration, software rollout and support integration activities with planning and delivery functions.

With these activities you will have a great impact on our business:

  • As a Voice Mobile Core Specialist, you are responsible for providing 2nd level support for applications, services and infrastructures in the Voice Mobile Core environment CSDB, HSS, HLR, UDM, MSS, MGW, STP
  • You define and track service level agreements and system KPIs for the responsible services and monitor their compliance and react proactively to impending violations of target values and quality restrictions with the involvement of the other 2nd level teams required for this.
  • You will independently identify and implement optimisation measures to prevent incidents.
  • You are responsible for escalation management and execute or support roll-outs of new systems, services and software
  • You act as a contact person and escalation level within the team and transfer know-how across departments.

With these skills you are a great candidate:

  • Basic understanding of mobile core protocols (TCP/IP, UDP, SCTP, GTP, Radius, Diameter, LDAP, SIGTRAN, RANAP, GMM).
  • Voice mobile Core E2E network analysis and troubleshooting, problem and change management. Analyse and interpret traces (Wireshark traces, network element traces, logs).
  • Good knowledge of mobile network architectures 2G/4G/5G with experience in main vendors technologies (Nokia, E//).
  • English (spoken and written) and German (reading, listening and willing to develop).

Must have technical / professional qualifications:

  • Hands on experience with Voice Core elements (CSDB, HSS, HLR, UDM, MSS, MGW, STP).
  • Scripting knowledge (Linux, Python, Ansible) desirable.
  • University degree: faculty of Electronics, Telecommunications and Information Technology
  • 2 years of experience in Telecommunication, on similar position.

Sounds like the perfect job? We’ve got even more to offer:

  • Hybrid way of working
  • Medical and dental services
  • Life and hospitalization insurance
  • Dedicated employee phone subscription
  • Take control of your benefits and choose any of the below options: meal tickets/private pension/vacation vouchers/cultural vouchers within the budget.
  • Special discounts for gyms and retailers
  • Annual Company Bonus
  • Loyalty Programme
  • We let you write your own story: go for a trip, experience new things, have fun and enjoy your 23 vacation days.
  • Special Paternal Program - 4 months of paid paternity leave

Vodafone is committed to attracting, developing and retaining the very best people by offering a motivating and inclusive workplace in which talent is truly recognised and rewarded. We are committed to promoting Inclusion for All with the belief that diversity plays an important role in the success of our business. We actively encourage everyone to consider becoming a part of our journey.

Apply now »