Optimum is looking to ensure high availability and performance of core mobility services by hiring a Level 2 – SRE Mobile Platform Engineer to maintain and upgrade their mobile core infrastructure.
Requirements
- Strong knowledge of LTE/EPC and 5G Core architecture.
- Hands-on with interfaces such as S1, S6a, S11, S5/S8, Gx, Gy, N1, N2, N4, N6, N7, N10.
- Understanding of IMS/VoLTE/VoNR architectures (P-CSCF, I-CSCF, S-CSCF, SBC, TAS).
- Scripting and automation skills in Python, Bash, or Ansible.
- Knowledge of monitoring and observability tools (Prometheus, Grafana, ELK, Splunk, or vendor-native NMS).
- Basic understanding of IP networking (BGP, OSPF, MPLS, QoS).
- Exposure to containerized mobile core solutions (Kubernetes, Docker) is a plus.
Responsibilities
- Operate, monitor, and maintain EPC and 5G Core platforms across multiple data centers.
- Perform configuration, integration, and maintenance of mobile core network elements (MME, SGW, PGW, AMF, SMF, UPF, HSS/UDM, PCRF/PCF, IMS/VoLTE).
- Provide Tier-2 support for incident resolution, escalations, and service-impacting issues.
- Participate in root cause analysis (RCA) and contribute to post-incident reviews.
- Support capacity planning, system upgrades, and performance optimization for mobile core nodes.
- Develop automation scripts (Python, Bash, Ansible) for provisioning, testing, and monitoring tasks.
- Implement and manage observability solutions (alarms, metrics, logging, tracing) for mobile core services.
Other
- 2–4 years of experience in mobile network operations or systems engineering roles.
- Hands-on experience supporting EPC (4G) and/or 5G Core platforms.
- Experience troubleshooting signaling protocols and core network interfaces.
- Familiarity with vendors (Ericsson, Nokia, Huawei, Cisco, Mavenir, or similar mobile core platforms).
- Collaborate with cross-functional teams (RAN, Transport, IP, Security) to deliver end-to-end mobile services.
