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.
• Cover 24x7 on-call duties, acting as technical authority for Core-related escalations.
  
  

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.
  
  

Specific skills & technical knowledge:

• Strong understanding of EPC and 5G Core architectures, including nodes such as SGSN, MME, SGW/PGW, UPF, PCRF/PCF, AMF, SMF, NRF, and NEF.
• Knowledge of CUPS architecture (control/user plane separation), QoS handling, and session management for data services.
• Familiarity with Diameter, GTP, and HTTP/2 (service-based interfaces).
• Awareness of VoLTE and VoNR integration and their dependency on PS bearer quality.
• Knowledge of roaming and authentication systems, including EIR (Equipment Identity Register) and Roaming Manager for steering and policy enforcement.
• Strong troubleshooting and analytical skills in multi-vendor, multi-technology environments.
• 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