We are seeking an experienced Senior Engineer – Network Performance & Service Optimization Lead to support network quality management and optimize telecom service performance across core network environments. The role involves troubleshooting customer-impacting issues, analyzing network KPIs, supporting service validation, and ensuring high-quality mobile network performance. Key Responsibilities: Support network quality management and service optimization initiatives Analyze critical customer issues and network performance discrepancies Lead service validation and testing activities within core network environments. Perform end-to-end trace analysis to identify root causes and support issue resolution. Monitor and analyze Mobile Core Network KPIs to identify bottlenecks and optimization opportunities Conduct packet capture, network auditing, and diagnostic analysis Collaborate with cross-functional teams on fault analysis and preventive measures Support project implementation, UAT, migrations, and BAU activities Provide technical guidance and mentorship to junior engineers Support night/weekend deployments during critical upgrades or migrations when required Requirements Bachelor’s degree in Electronics, Telecommunications, Computer Science, or related field 7–10 years of experience in telecom core network operations and optimization Experience working with Mobile Operators, MVNOs, MNVEs, or telecom vendors Strong knowledge of CS Core Network technologies (MSS, MGW, SBC, STP, SMSC, HLR, IVR) Good understanding of PS Core Network technologies (SGSN, SGW, PGW, PCRF, DNS, AAA) Experience with IMS nodes (CSCF, TAS, MRF, ePDG) Strong troubleshooting and network quality assurance skills Good understanding of VoLTE, Voice, SMS, and Data call flows Hands-on experience with telecom protocols such as SIP, MAP, GTP, SMPP, RTP, Gx, Gy, Ro Experience using packet analysis and network tracing tools Working knowledge of Jira and Confluence