Core Network Expert

Responsibilities

• Collaborate with Core/IMS Network vendors and Core testing tool vendors in building Core lab (private and public cloud)
• Integrate and Deploy core network/IMS capabilities in the Lab, working both in an individual and team capacity
• Review/interpret requirements and translate them into Systems specifications/requirements (end-to end design/Call flows/System architecture/Interface definition)
• Provide inputs and support to the Testing team in creating/executing test plans
• Provide leadership in the Core Testing areas
• Facilitate live troubleshooting of lab/production network issues, using overall systems, testing tools, UE, and logs
• Assist in debugging and identifying root cases for the issues/defects experiences in lab or production environment and accordingly document them in JIRA systems
• Manage multiple tasks by multi-tasking and accomplish goals by working across the organization with various teams
• Contribute to Test Automation effort, by writing testing scripts for the Testing tools (Spirent Velocity, Keysight)

Qualifications

• BS or MS in Engineering or Technical education or an equivalent combination of highly related experiences and education
• 8+ years of experience in the wireless industry
• Extensive understanding and experience in 4G EPC/5GC core, CUPS, virtualized Network Functions
• Thorough understanding of Core Network architecture, as describes in 3GPP standards (Rel 15 & 16)
• and technology from previous generations.
• Knowledge and/or documented work experience in the following core functions: SMF / UPF / AMF / NRF / NSSF / PCF / UDM / AUSF / MME, SAEGW, SPGW, or ePDG, and IMS components
• Hands-on experience in designing, implementing, integrating, and deploying solutions in the EPC (Evolved Packet Core).
• Experience in working on testing tools used for testing/validation of the core network solutions
• Understanding 3GPP Core Network (EPC, 5GC) and IMS is minimum requirement
• Understanding of end to end call flow scenarios, such as - VoNR, ViNR, inter-carrier roaming (n14, N26), EPS fallback, SMS, MMS, E911
• Extensive understanding of software systems/services running in the virtualized environments (Kubernetes, AWS) and Core Network Functions (NF’s – VNF/CNF)
• Experience in scripting and developing test automation
• Understanding of Core Network performance KPI’s/metrics – such as, latency/throughput considerations and issues from core cloud deployment to Data Center locations
• Understanding and experiences with virtualized networks, orchestration, and automation across a comprehensive network architecture
• Working knowledge of IP networking and cloud/MANO technologies (Kubernetes)
• Hands on experiences in testing tools, such as UE simulators, UE debuggers, Load/Traffic generators, packet core simulators
• Excellent skills with Microsoft productivity apps, Project as well as Database tools
• Excellent organizational and problem-solving abilities
• Ability to effectively communicate technical issues to a wide range of audiences both orally and in writing
• Ability to work with minimal supervision and handle multiple tasks/schedules simultaneously