Jazz is looking for a Core Performance Analytics Expert to join its Technology team in Islamabad. This role is essential for delivering an exceptional user experience across Jazz’s advanced network services by leading performance monitoring, optimization, and quality assurance efforts for IMS, VoLTE, and the emerging 5G Core network. The successful candidate will proactively track network performance, resolve complex issues, and improve Quality of Service (QoS) and Quality of Experience (QoE) for voice, messaging, and data services. Reporting to the Manager Network Performance Analytics, this position requires a hands-on approach to maintaining and enhancing cutting-edge telecommunications technologies.
Key Responsibilities
- Continuously monitor Key Performance Indicators (KPIs) and Key Quality Indicators (KQIs) for IMS, VoLTE, and 5G Core networks to detect performance issues and initiate corrective measures.
- Conduct regular parameter audits using automation scripts to verify configurations of critical network elements such as MME, SGW, PGW, AMF, SMF, UPF, IMS nodes (CSCF, MGCF, HSS), and PCRF, ensuring adherence to design standards and vendor guidelines.
- Define, analyze, and optimize QoS profiles, policy control (PCC), and bearer management for VoLTE, IMS, and 5G QoS flows, collaborating with planning, transmission, and RAN teams to maintain superior end-to-end QoE for VoLTE, VoWiFi, and 5G services.
- Perform traffic and capacity trend analysis and forecasting to recommend scaling strategies for EPC, 5GC, and IMS components, ensuring optimal network capacity and service quality.
- Conduct root cause and service impact analyses for network degradations affecting IMS, VoLTE, and 5G services; design and implement optimization strategies to improve call setup success rates, voice quality, call drop rates, application latency, and overall throughput.
- Coordinate with equipment vendors for performance feature trials, tuning, and critical issue resolution; work cross-functionally with planning, operations, IT, and commercial teams to ensure comprehensive quality assurance.
- Utilize and enhance analytics platforms such as U2020, SmartCare, and Nokia NMS; develop custom dashboards and drive automation initiatives for reporting, alerting, and KPI monitoring.
- Develop Python-based automated audit scripts for critical parameter verification and support future AI/ML integration by providing domain expertise and data requirements.
- Prepare periodic performance and quality reports for senior management and maintain accurate documentation of system configurations, changes, and performance baselines.
Required Qualifications
- Bachelor’s degree in Electrical, Electronics, Computer Engineering, or a related field with at least 5 years of relevant experience.
- Strong understanding of IMS/VoLTE/VoWiFi architecture, including interfaces and call flows (CSCF, MGCF, MRF, HSS, PCRF).
- Proficient knowledge of 5G Core architecture and functions such as AMF, SMF, UPF, NRF, PCF, AUSF, and UDM.
- In-depth knowledge of packet core nodes (MME, SGW, PGW) and their evolution into 5G functions.
- Ability to trace complex VoLTE/VoWiFi call flows and 5G data session flows, including QoS flow management.
- Experience with QoS parameters for IMS/VoLTE and 5G (QCI, ARP, GBR, MBR, AMBR, 5QI).
- Familiarity with voice codecs (AMR-WB, EVS) and voice quality metrics (MOS, R-Factor).
- Hands-on experience with vendor-specific network management and OSS tools such as Huawei U2020, Nokia NMS, and Ericsson OSS.
- Strong proficiency in Python and Shell scripting for automation and data analysis.
- Basic understanding of AI/ML concepts relevant to network performance and optimization.
- Proficiency in data visualization and reporting tools including Tableau, Power BI, and advanced Excel.
- Excellent communication, presentation, incident reporting, project management, and stakeholder management skills.
- Analytical mindset with a passion for data-driven problem-solving in complex network environments.
Preferred Qualifications and Benefits
Jazz is recognized as one of Pakistan’s leading private sector employers, known for its visionary leadership, culture of continuous learning, and commitment to innovation and customer focus. Employees enjoy a dynamic work environment that encourages entrepreneurial thinking and collaboration. Joining Jazz offers the opportunity to contribute to transformative initiatives impacting over 75 million customers, empowering them in a rapidly evolving digital economy. This role is ideal for professionals eager to play a critical part in advancing next-generation telecommunications services.
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