Wireless Core Engineer

About Position: We are seeking an experienced Wireless Core Engineer to join our Wireless Core Network Operations team. The role focuses on end-to-end administration and operations of HLR/HSS systems, supporting mission critical wireless services. The ideal candidate will act as an SME for Wireless Core, with strong hands-on expertise in 3G/4G core networks, signaling protocols, and production troubleshooting.

Role: Wireless Core Engineer Location: All Persistent Locations Experience: 5 to 12 Years Job Type: Full Time Employment What You'll Do: Perform end‑to‑end operations and administration of HLR, HSS, and SMSC systems Act as an SME for Wireless Core Network Operations Support subscriber management and provisioning across 3G, 4G, and 5G networks Monitor, troubleshoot, and resolve complex HLR/HSS/SMSC production issues under SLA Analyze and debug SS7, MAP, Diameter, VoLTE, and SGd call flows Support system deployment, software upgrades, and subscriber migrations Work on STP and DRA architecture, call routing, and signaling optimization Collaborate with vendors, NOC teams, and cross‑functional engineering teams Ensure high availability and performance of wireless core services Participate in incident management, root cause analysis, and preventive actions Expertise You'll Bring: 5+ years of hands‑on experience in HLR/HSS operations and administration Strong knowledge of Wireless Core Network architecture including HLR, HSS, SMSC, STP, and DRA Expertise in 3G and 4G call flows with exposure to 5G Proficiency in SS7, MAP, Diameter, VoLTE, and SGd signaling Experience with HLR/HSS and SMSC deployment, upgrades, and subscriber migration Strong troubleshooting skills in production wireless core environments Experience working under pressure in mission‑critical telecom operations Solid understanding of subscriber data management and signaling protocols Hands‑on experience with Linux/Unix system administration Working knowledge of Kubernetes environments Good scripting skills for automation and operational support Strong analytical and problem‑solving abilities Benefits: Competitive salary and benefits package Culture focused on talent development with quarterly growth opportunities and company-sponsored higher education and certifications Opportunity to work with cutting-edge technologies Employee engagement initiatives such as project parties, flexible work hours, and Long Service awards Annual health check-ups Insurance coverage: group term life, personal accident, and Mediclaim hospitalization for self, spouse, two children, and parents Values-Driven, People-Centric & Inclusive Work Environment: Persistent is dedicated to fostering diversity and inclusion in the workplace. We invite applications from all qualified individuals, including those with disabilities, and regardless of gender or gender preference. We welcome diverse candidates from all backgrounds.

We support hybrid work and flexible hours to fit diverse lifestyles. Our office is accessibility-friendly, with ergonomic setups and assistive technologies to support employees with physical disabilities. If you are a person with disabilities and have specific requirements, please inform us during the application process or at any time during your employment Let's unleash your full potential at Persistent - persistent.com/careers "Persistent is an Equal Opportunity Employer and prohibits discrimination and harassment of any kind."