About Position:

We are looking for an C++ Developer with strong 4G and 5G protocol expertise to join the team responsible for real-time parsing, decoding, and state tracking of mobile core network signaling. The role involves developing protocol parsers and state machines that process live LTE and 5G control-plane traffic, extract structured events and session records, and provide downstream analytics. The ideal candidate will have deep expertise in 3GPP standards, LTE EPC, 5G Core SBA, and high-performance C++ development.

Role: Telecom C++ Developer
Location: Pune
Experience: 8 to 12 years
Job Type: Full-Time Employment

What You'll Do:

Design and develop 4G protocol parsers and state machines for S1AP, GTP-C v1/v2, PFCP, and SGsAP.
Design and develop 5G protocol parsers and state machines for NGAP and Service-Based Architecture (SBI) interfaces.
Implement multi-protocol correlation engines to track complete subscriber and session lifecycles.
Correlate S1AP/NGAP contexts with GTP-C, PFCP, NAS, charging, and SBI service interactions.




Build protocol decoding frameworks aligned with evolving 3GPP releases.
Analyze and process LTE and 5G network signaling for registration, mobility, charging, authentication, roaming, and policy control use cases.
Develop unit and integration test frameworks using PCAP-based traffic replay environments.
Collaborate with packet ingestion teams on ZMQ messaging interfaces and packet metadata design.
Contribute to Docker packaging, Helm chart development, and Kubernetes deployments.
Participate in architecture reviews, code reviews, troubleshooting, and technical documentation.

Expertise You'll Bring:

7 to 12 years of experience in Telecom Software Development, Mobile Core Networks, Network Analytics, or Protocol Engineering.
Solid hands-on expertise in Modern C++ (C++17 or later), systems programming, multithreading, memory optimization, and high-performance applications.
Deep understanding of LTE EPC and 5G Core network architectu

📌 C++ Developer (Pune)
🏢 Persistent Systems
📍 Pune