Core Performance Analytics Expert

Grade: L2

Location: Islamabad

Last date to apply: 11 August 2025

What is Core Performance Analytics Expert?

As a Core Performance Analytics Expert, you'll be at the forefront of ensuring an exceptional user experience for Jazz's modern network services. Your primary focus will be leading the end-to-end performance, optimization, and quality assurance for the IP Multimedia Subsystem (IMS), Voice over LTE (VoLTE), and the evolving 5G Core network. You'll proactively monitor performance, troubleshoot advanced issues, and continuously enhance Quality of Service (QoS) and Quality of Experience (QoE) for all voice, messaging, and data services that rely on these cutting-edge technologies.

The role Core Performance Analytics Expert within the Technology department at Jazz, located in Islamabad. The position reports directly to the Manager Network Performance Analytics.

What does Core Performance Analytics Expert do?

A key part of your role will involve conducting regular parameter audits using automation scripts. You'll scrutinize configurations of critical network elements like MME, SGW, PGW, AMF, SMF, UPF, IMS nodes (CSCF, MGCF, HSS), and PCRF. This ensures everything aligns with network design guidelines, performance standards, and vendor recommendations, all vital for optimal VoLTE, IMS, and 5G Core operations.

Key Responsibilities & Deliverables

• IMS, VoLTE & 5G Core Performance Monitoring: You'll continuously monitor Key Performance Indicators (KPIs) and Key Quality Indicators (KQIs) across IMS, VoLTE, and 5G Core domains. This includes pinpointing performance degradation, identifying bottlenecks, and proactively initiating corrective actions for modern voice and 5G data services.
• QoS & QoE Management (VoLTE, IMS & 5G): Your responsibilities will involve defining, analyzing, and optimizing QoS profiles, policy control (PCC), and bearer management for VoLTE, IMS, and 5G QoS flows. You'll also coordinate with planning, transmission, and RAN teams to maintain superior end-to-end QoE for VoLTE, VoWiFi, and 5G services.
• Traffic & Capacity Analysis (IMS, VoLTE & 5G Core): You'll conduct trend analysis and forecasting to ensure optimal capacity and service quality for all IMS, VoLTE, and 5G Core elements. This includes recommending scaling strategies for EPC, 5GC, and IMS elements based on the growth of modern services.
• Performance Optimization (IMS, VoLTE & 5G Core): You'll perform root cause analysis (RCA) and service impact analysis for any network degradations affecting IMS, VoLTE, and 5G services. You'll design and implement optimization strategies to improve VoLTE/VoWiFi call setup success rates, voice quality (MOS), call drop rates, application latency over 5G, and overall 5G throughput. Specific areas include addressing VoLTE/VoWiFi call drops and quality degradation, application latency and throughput on 5G, and core network issues impacting 5G slicing and service continuity.
• Vendor & Stakeholder Collaboration: You'll be the liaison with equipment vendors for performance feature trials, tuning, and critical issue resolution concerning IMS, VoLTE, and 5G Core technologies. Cross-functional collaboration with planning, operations, IT, and commercial teams will be essential for comprehensive quality assurance.
• Tools & Automation: You'll utilize and enhance analytics platforms (e.g., U2020, SmartCare, Nokia NMS) and develop custom dashboards for improved visibility across IMS, VoLTE, and 5G Core. You'll drive automation initiatives for reporting, alerting, and KPI monitoring, and develop Python-based automated audit scripts for critical parameter verification across these domains. Crucially, you'll facilitate future integration of AI/ML-driven solutions by providing domain expertise and data requirements to an in-house development team.
• Documentation & Reporting: You'll prepare periodic performance and quality reports for senior management, focusing specifically on IMS, VoLTE, and 5G Core performance. Maintaining accurate documentation of system configurations, changes, and performance baselines for these critical domains will also be a key responsibility.

Requirements

Experience and Educational Requirements

• Minimum of 5 years of experience with a BSc. in Electrical/Electronics/Computer Engineering or a related field.

Soft Skills and Technical Skills

• Exceptional presentation and incident reporting skills.
• Strong project management capabilities.
• Excellent communication and stakeholder management skills.
• An analytical mindset with a passion for data-driven insights and problem-solving in complex network environments.

Essential Skills You Must Have

• Strong Understanding of IMS/VoLTE/VoWiFi Architecture: In-depth knowledge of the IP Multimedia Subsystem (IMS) for VoLTE and VoWiFi services, including their interfaces, functionalities, and call flows (e.g., CSCF, MGCF, MRF, HSS, PCRF).
• 5G Core Architecture: Proficient knowledge of 5G Core (5GC) functions and interfaces, including Control Plane and User Plane Separation (CUPS), Service-Based Architecture (SBA), AMF, SMF, UPF, NRF, PCF, AUSF, UDM.
• Packet Core Nodes: A deep understanding of the roles and interactions of key nodes like MME, SGW, PGW, and their evolution into 5G functions.
• VoLTE/VoWiFi Call Flows: You must be capable of tracing complex signaling sequences for establishing, maintaining, and releasing voice calls over LTE and WiFi.
• 5G Data Session Flows: The ability to trace UE data paths from attach to session establishment, IP address allocation, and QoS flow management in 5G.
• QoS Parameters (VoLTE, 5G): Experience with QoS parameters defining voice bearer priority, throughput, and service quality for both IMS/VoLTE (QCI, ARP, GBR, MBR, AMBR) and 5G (5QI, 5G QoS Flow Identifiers, Reflective QoS).
• Voice Codecs and Quality Metrics: Knowledge of voice codecs (e.g., AMR-WB, EVS) and their impact on Mean Opinion Score (MOS), R-Factor, and other voice quality metrics.
• Understanding of Mapping Across Interfaces: Familiarity with policy and charging signaling between PCRF/PCF, PCEF/SMF/UPF, and application functions over Gx, Rx, N7 (for 5G), and Diameter interfaces, specifically for voice and data.
• Network Management & OSS Tools: Hands-on experience with vendor-specific IMS, VoLTE, and 5G Core network management systems (e.g., Huawei U2020, Nokia NMS, Ericsson OSS) and operational support systems.

Programming & Automation:

• Strong proficiency in Python for scripting, data analysis, and automation.
• Experience with Shell scripting for system automation.
• Proven ability to develop automated scripts for network checks, audits, and performance analysis.
• Basic Understanding of AI/ML Concepts: A foundational knowledge of Artificial Intelligence and Machine Learning concepts (e.g., anomaly detection, predictive analytics) and their potential application in network performance and optimization. This is essential for effectively collaborating with a dedicated in-house development team on future initiatives.
• Data Visualization & Reporting: Proficiency with tools like Tableau, Power BI, and advanced Excel for QoS trend analysis, dashboard creation, and data visualization. You should also be capable of drafting clear RCA reports, SLA adherence reports, and comprehensive performance reports for IMS, VoLTE, and 5G Core.

Benefits

As one of the leading employers in the country, Jazz epitomizes the philosophy that each Jazz employee is passionately living a better every day inspired and enabled by visionary leadership, a unique professional culture, a flourishing lifestyle, and continuous learning and development.

Our core values include qualities essential for a positive organizational culture - truthfully guiding entrepreneurial and innovative mindsets, harnessing professional and interpersonal collaboration, and fostering across-the-board customer-obsession.

As one of the largest private sector organizations in Pakistan, our objective is to continue to change the lives of our 75 million customers for the better. This is an opportunity for someone who wants to be part of something transformative, someone who can play a critical role in driving our success. Together, we can empower millions more with the tools necessary to progress in an increasingly digital economy.