Back Office Core Engineer

1 week ago

Bucharest Metropolitan Area, Romania Connect44 Full time €30,000 - €60,000 per year

We are looking for a Back Office Core Engineer You will provide operational support for Core networks, manage incidents and changes, and ensure high availability across legacy and cloud-native platforms.

Main activities and tasks:

  • Provide second-line operational support for the Core network, ensuring high availability, stability, and service quality.
  • Manage the lifecycle of Core-related Incidents, Problems, and Changes, coordinating with vendors, field engineers, and stakeholders.
  • Perform configuration, integration, and maintenance of Core nodes across legacy and cloud-native platforms.
  • Monitor performance KPIs, signalling flows, and service quality metrics, proactively detecting degradations and implementing corrective actions.
  • Participate in Change Management, planning and executing software upgrades, capacity expansions, parameter changes, and feature activations in line with approved Methods of Procedure (MoPs).
  • Conduct acceptance testing and validation for new Core nodes, releases, and services before production rollout.
  • Provide remote technical support for Core-related implementation or troubleshooting activities, including interworking with RAN, IP transport, and Data Centre teams.
  • Support Problem Management by performing root cause analysis (RCA) of recurring service issues and recommending permanent fixes.
  • Deliver reports and documentation on incidents, performance trends, and network changes, contributing to the operational knowledge base.
  • Participate in public event assurance by monitoring Core traffic and subscriber sessions during peak or special events.
  • Cover 24x7 on-call duties, acting as technical authority for Core-related escalations.
  • Collaborate closely with RAN, IP, Security, and Data Centre teams to ensure end-to-end service stability.
  • Contribute to continuous improvement initiatives, including automation of routine tasks, capacity planning, and feature enablement.

Required Experience:

  • Hands-on operational experience with Core network elements.
  • Familiarity with NFVI / Cloud Native platforms and Core virtualisation.
  • Strong background in Incident, Problem, and Change Management in telecom Core networks.
  • Knowledge of interworking between RAN, IP/MPLS, and Core.
  • Experience in Managed Services or NOC environments is desirable.
  • Bachelor's degree in Telecommunications, Electronics, or IT Engineering (or equivalent experience).

Specific skills & technical knowledge:

  • Good understanding of mobile Core network architectures, including Circuit-Switched (CS), Packet-Switched (PS/EPC), IMS, VAS, and evolving 5G Core domains.
  • Knowledge of Core protocols and interfaces used for voice, data, signalling, and policy/charging functions.
  • Familiarity with VoLTE, VoWiFi, and multimedia Core services, as well as integration with RAN, IP transport, and Data Centres.
  • Knowledge of subscriber/session management, mobility, and policy/charging control.
  • Scripting/automation skills for operational efficiency are an advantage.
  • Strong troubleshooting and analytical skills in multi-vendor, multi-technology environments.
  • Excellent communication, documentation, and reporting skills.
  • Professional level of English (written and spoken) is mandatory.

What we offer:

  • Growth Opportunities – Support for learning and career advancement.
  • Work-Life Balance – Flexible hours and hybrid work options.
  • Inclusive Culture – A welcoming, diverse environment where everyone feels valued.
  • Generous Time Off

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