About Position:

We are looking for a Telecom Domain Expert to join the team responsible for defining and maintaining the network KPI and analytics layer of our mobile network performance platform. This is a domain-first role: the primary contribution is deep knowledge of mobile network procedures, failure modes, and performance metrics not software development. You will translate that expertise into KPI definitions, formula expressions, protocol error mappings, and dimension data configurations that drive the analytics dashboards and subscriber intelligence features used by mobile operators worldwide. The platform spans the full mobile network stack from 2G CS voice through 3G UMTS, 4G LTE EPC, 5G SA/NSA core, IMS/VoLTE, and roaming interfaces.

Role: Telecom Domain Expert
Location: All Persistent Locations
Experience: 12+ years
Job Type: Full-Time Employment

What You'll Do:

5G Recent Radio & 5G Core (Primary Focus)
In-depth knowledge of 5G core architecture: AMF, SMF, UPF, UDM, AUSF, PCF, NRF, NSSF, CHF, SEPP and their roles in registration, PDU session, and policy procedures




Deep understanding of NGAP (TS 38.413): UE context management, PDU session resource management, handover (Xn, N2), paging, and NAS transport procedures
Knowledge of 5G NAS (TS 24.501): 5G-MM (registration, deregistration, service request, mobility update) and 5G-SM (PDU session establishment, modification, release) procedure flows and cause codes
Understanding of 5G network slicing: NSSAI selection, slice-specific access control (NSAC), per-slice KPI dimensioning, and network slice instance lifecycle
Familiarity with 5G SA vs NSA deployment architectures (EN-DC, NR-DC): which procedures and interfaces are relevant for each deployment mode
4G LTE & EPC
Deep knowledge of EMM/ESM (TS 24.301): attach, detach, TAU, service request, bearer management procedures and NAS cause codes
Working knowledge of S1AP (TS 36.413): E-RAB management, handover (S1, X2), paging, UE context release, and path switch

📌 Telecom Domain Expert (Pune)
🏢 Persistent Systems
📍 Pune