Mavenir is building the future of networks and pioneering advanced technology, focusing on the vision of a single, software-based automated network that runs on any cloud. As the industry's only end-to-end, cloud-native network software provider, Mavenir is transforming the way the world connects, accelerating software network transformation for 250+ Communications Service Providers in over 120 countries, which serve more than 50% of the world’s subscribers.

Role Summary

Plans, designs, develops and tests software systems or applications for software enhancements and new products including cloud-based or internet-related tools.

Key Responsibilities

Feature development for IMS based SBC solutions

Managing existing deployments and customer support

Building test framework to help test the new feature/fixes for UT/IT

Job Requirements

Core SIP and IMS Protocol Development

must-have Deep knowledge of SIP (RFC 3261 and extensions: PRACK, UPDATE, REFER, SUBSCRIBE/NOTIFY, PUBLISH) for implementing and debugging call control logicmust-have Hands-on experience implementing IMS call flows (VoLTE, VoWiFi, RCS) at the P-CSCF / SBC layer — registration, session establishment, supplementary servicesmust-have Robust understanding of SDP offer/answer model, codec negotiation (G.711, G.729, AMR, EVS, Opus), and DTMF relay mechanismsstrong Experience with Diameter protocol development (Rx, Gx, Gy, Cx interfaces) and SCTP transport implementationstrong Familiarity with STIR/SHAKEN identity framework implementation for call authentication and attestation

C/C++ Programming skills
must-have Expert-level C/C++ (C++14/17) for high-performance, low-latency signaling and media processing componentsmust-have Proficiency in multi-threaded programming, lock-free data structures, and event-driven architectures (e.g., select/epoll,



Boost.Asio)must-have Experience with memory management, profiling, and debugging tools (Valgrind, GDB, AddressSanitizer, perf)

Media and RTP plan development

must-have Solid understanding of RTP/RTCP, jitter buffers, packet loss concealment, and RTCP-based QoS feedback mechanismsmust-have Experience developing or integrating SRTP/DTLS-SRTP encryption for secure media transport in IMS environmentsstrong Knowledge of media transcoding pipelines, codec adaptation, and SIPREC-based call recording architecturesnice Familiarity with DPDK or kernel-bypass networking techniques for high-throughput media forwarding at scale
Security features developmentmust-have Experience developing TLS/mTLS session management, certificate lifecycle handling, and cipher suite negotiation in SIP stacksmust-have Ability to design and implement SBC security policies: topology hiding, header manipulation, DoS/DDoS rate limiting and blacklisting enginesCloud Native and NFV based architecture strong Experience containerizing SBC components with Docker and deploying on Kubernetes, including HA and geo-redundant topologiesstrong Understanding of NFV/MANO frameworks (ETSI NFV) and integration with VNFM/NFVO for lifecycle management of virtualized SBCsstrong Designing REST/gRPC-based northbound APIs for SBC configuration, monitoring, and integration with OSS/BSS systems

Accessibility

Mavenir is committed to working with and providing reasonable accommodation to individuals with physical and mental disabilities. If you require any assistance, please state in your application or contact your recruiter.

Mavenir is an Equal Employment Opportunity (EEO) employer and welcomes qualified applicants from around the world, regardless of their ethnicity, gender, religion, nationality, age, disability, or other legally protected status.

📌 Member of Technical Staff - III, Software (Bengaluru)
🏢 Mavenir
📍 Bengaluru