AST Senior Network Performance Service Expert

Job Description

Appealing points: 

• End-to-End 4G/5G & Satellite Core Network Expert Lead performance monitoring and optimization across LTE, 5G (NSA & SA), IMS, and Non-Terrestrial Network domains.
• KPI Ownership & Advanced Troubleshooting Leadership Drive network quality improvements using deep signaling analysis, Wireshark/log analysis, and passive probing tools.
• Executive-Level Reporting & Strategic Insight Deliver data-driven dashboards and performance insights to senior management while demonstrating strong technical ownership.

Annual Salary: 8 Million yen and above

Responsibilities:

• To be the domain expert, use your technical knowledge to extract information from different data sources to ensure solid performance status for the network.
• Daily Monitoring for core nodes specially for Satellite connectivity and KPIs including trend tracking and troubleshooting & follow the escalation process till closure.
• Own Network KPIs and discover new enhancements opportunities.
• E2E Troubleshooting capabilities, to be able to lead joint discussions / investigations.
• Initiate streams to enhance network quality key performance indicators.
• Create daily/weekly/monthly reports about network performance status.
• Create executive dashboards to be presented to management.
• Assess new features/major activities from performance point of view and their effect on KPIs.
• To have quantitative and qualitative analysis skills, and able to assess complex issues to take the right decision and escalation.
• To be a role model to the team members when it comes to ownership, proactivity and taking responsibility.

Job Qualification: 

• Bachelor's Degree in Engineering or related field.
• 10+ years experience in mobile telecom field
• Understanding of E2E CORE including IMS, LTE & 5GSA network elements functions such as NTAS, CSCF, SBC, HSS, PCF, CHF etc and AMF, SMF, NRF, MME, SGW, PGW, PCRF, DPI, CGNAT etc.
• Solid Technical knowledge of 4G & 5G (NSA & SA) & VoLTE networks
• Strong knowledge of service based interfaces (Nnrf, Namf, Nsmf, Nausf etc), S5, S8, S10, S11, S6a, S1AP, S1U, GTP, SIP, RTP, Diameter protocols in addition to Gx , Gy, Rx and Sy interfaces.
• Knowledge of Non Terrestrial Network concepts (Satellite architecture, latency models, 3GPP Rel 17/18 awareness)
• Knowledge of E2E call and data flows
• Strong knowledge of Docker and Kubernetes and hands on experience.
• Solid tracing & logfiles analysis knowledge using different tools (Wireshark, Radcom. Etc).
• Strong knowledge in signaling flows and protocols. In addition to IOT experience.
• KPI Performance & troubleshooting including Wireshark analysis, Log analysis, with strong analytical and problem solving skills.
• Strong experience in using passive probing tools for troubleshooting and insights analysis and reporting.
• Strong verbal & written communication skills, Excellent presentation skills, to report to high level management (Verbal and PPT).
• Strong analytical and problem solving skills

Preferred Qualifications

• Kubernetes/5G SA certification
• Previous Satellite performance experience.
• Nokia and Cisco nodes experience would be preferred
• Experience working on multiple products/projects in parallel

Language Skills: Business-level English No Japanese level.

Company:

This company is a leading foreign-affiliated solutions and services provider in the information, communications, and technology (ICT) industry. With more than 130,000 employees in 90 countries, they provide innovative IT solutions to nearly 1000 global customers, including Fortune 500 companies.

【Measures against passive smoking】

No smoking indoors allowed