DevOps Engineer
Back Office Packet Core Engineer
Удалённоfulltime
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Main activities and tasks:
- Provide 2nd line operational support for the Packet Core network (2G/3G PS Core, 4G EPC, and 5G SA), ensuring high availability and performance.
- Manage the lifecycle of Packet Core-related Incidents, Problems, and Changes, coordinating with vendors, field teams, and stakeholders.
- Perform configuration and maintenance of Packet Core nodes (e.g., SGSN, GGSN, MME, S-GW/P-GW, and cloud-native 5G SA NFs such as SMF and UPF).
- Participate in network upgrades for all Packet Core products.
- Monitor Packet Core stability and performance alarms; investigate performance degradations, troubleshoot anomalies, and restore service.
- Assist in Change Management activities such as planning, executing, and validating configuration changes, software updates, and parameter adjustments.
- Conduct acceptance testing and validation of new equipment, features, and site upgrades prior to production rollout.
- Provide remote technical support to field engineers during installation, migration, and troubleshooting activities.
- Contribute to knowledge sharing and documentation regarding operational procedures, troubleshooting guides, and lessons learned.
- Deliver managed services during standard business hours and participate in on-call rotations, acting as technical authority for Packet Core-related escalations.
- Support continuous improvement initiatives within operations, focusing on network resilience, automation, and efficiency.
Required Education & Trainings:
- Bachelor’s degree in Telecommunications, Networking, or IT Engineering (or equivalent experience).
Required Experience:
- Background in Incident, Problem, and Change Management in an operations/NOC setting.
- Experience in remote or site operations (integration, acceptance, commissioning, testing, maintenance, and support) of Packet Core nodes.
- Familiarity with network monitoring and troubleshooting tools.
- Experience working with multi-vendor telecom networks is desirable, with a strong focus on Ericsson equipment.
Specific skills & technical knowledge:
- Very good knowledge of 2G/3G PS Core, 4G EPC, and 5G SA Packet Core architectures, network topologies, and standards (3GPP).
- Extensive experience with Ericsson Packet Core products: SGSN-MME, GGSN/P-GW, EPG, and cloud-native 5G SA NFs (SMF, UPF) deployed on Ericsson Cloud Infrastructure (NFVI/CaaS).
- Knowledge of and ability to troubleshoot Packet Core protocols (GTP-C/U, Diameter, RADIUS, S1-MME/S11/S5/S6a, HTTP/2 SBI) and investigate alarms.
- Knowledge of setting, collecting, and interpreting Packet Core signalling traces and protocol captures (e.g., using Wireshark, Ericsson AMOS/OSS, or equivalent tooling).
- Ability to troubleshoot performance degradation issues.
- Knowledge of data networking technologies, transport architectures, and network topologies.
- Knowledge of UNIX or LINUX operating systems.
- Scripting skills (Bash, Python, Perl) and familiarity with cloud-native tooling (Kubernetes/kubectl, Helm, Docker) for managing containerised Packet Core NFs.
- Strong analytical, troubleshooting, and problem-solving skills.
- Excellent communication and documentation abilities.
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