Mavenir Systems1 week ago

Senior SE

Mavenir Systems

On-site · Bengaluru, Karnataka, India

Bengaluru, Karnataka, IndiaOn-siteFull TimeSenior LevelNot SpecifiedEnterprise

Type

Full Time

Level

Senior Level

Education

Not Specified

Company size

Enterprise

Job Summary

Senior SE at Mavenir responsible for designing, developing, and testing software systems for IMS/SBC solutions and cloud-native networks. Role encompasses feature development for IMS-based SBC solutions, managing deployments and customer support, and building test frameworks to validate new features and fixes. Requires deep SIP/IMS protocol expertise, handling call control, SDP/codec negotiation, Diameter/SCTP, STIR/SHAKEN identity, high-performance C/C++ development, multi-threaded and event-driven architectures, secure media transport (SRTP/DTLS-SRTP), media pipelines and transcoding, SBC security policies, REST/gRPC APIs for configuration, and cloud-native/NFV deployment with Docker/Kubernetes. Familiarity with OSS/BSS integration, QoS concepts, and security considerations for large-scale telecom environments. Location: Bangalore, India. Remote work not indicated; in-person at the listed location.

Required Qualifications

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 logic must-have
Hands-on experience implementing IMS call flows (VoLTE, VoWiFi, RCS) at the P-CSCF / SBC layer — registration, session establishment, supplementary services must-have
Strong understanding of SDP offer/answer model, codec negotiation (G.711, G.729, AMR, EVS, Opus), and DTMF relay mechanisms
Experience with Diameter protocol development (Rx, Gx, Gy, Cx interfaces) and SCTP transport implementation
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 components
Proficiency in multi-threaded programming, lock-free data structures, and event-driven architectures (e.g., Boost.Asio)
Experience with memory management, profiling, and debugging tools (Valgrind, GDB, AddressSanitizer, perf)
Media and RTP plan development; solid understanding of RTP/RTCP, jitter buffers, packet loss concealment, and RTCP-based QoS feedback mechanisms
Experience developing or integrating SRTP/DTLS-SRTP encryption for secure media transport in IMS environments
Strong Knowledge of media transcoding pipelines, codec adaptation, and SIPREC-based call recording architectures
Familiarity with DPDK or kernel-bypass networking techniques for high-throughput media forwarding at scale
Security features development; TLS/mTLS session management, certificate lifecycle handling, and cipher suite negotiation in SIP stacks
Cloud Native and NFV-based architecture; containerizing SBC components with Docker and deploying on Kubernetes; HA and geo-redundant topologies
Understanding of NFV/MANO frameworks (ETSI NFV) and integration with VNFM/NFVO for lifecycle of virtualized SBCs
Designing REST/gRPC-based northbound APIs for SBC configuration, monitoring, and OSS/BSS integration
SBC security policies: topology hiding, header manipulation, DoS/DDoS rate limiting and blacklisting engines
Experience with OSS/BSS integrations and monitoring tools
Accessibility and equal employment opportunity awareness
Experience with open-source/network software stacks and performance optimization tools

Desired Qualifications

Core SIP and IMS Protocol Development must-have
Deep knowledge of SIP (RFC 3261 and extensions: PRACK, UPDATE, REFER, SUBSCRIBE/NOTIFY, PUBLISH) must-have
Hands-on experience implementing IMS call flows (VoLTE, VoWiFi, RCS) at the P-CSCF / SBC layer — registration, session establishment, supplementary services must-have
Strong understanding of SDP offer/answer model, codec negotiation (G.711, G.729, AMR, EVS, Opus), and DTMF relay mechanisms
Experience with Diameter protocol development (Rx, Gx, Gy, Cx interfaces) and SCTP transport implementation
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 components
Proficiency in multi-threaded programming, lock-free data structures, and event-driven architectures (e.g., Boost.Asio)
Experience with memory management, profiling, and debugging tools (Valgrind, GDB, AddressSanitizer, perf)
Media and RTP plan development; solid understanding of RTP/RTCP, jitter buffers, packet loss concealment, and RTCP-based QoS feedback mechanisms
Experience developing or integrating SRTP/DTLS-SRTP encryption for secure media transport in IMS environments
Strong knowledge of media transcoding pipelines, codec adaptation, and SIPREC-based call recording architectures
Familiarity with DPDK or kernel-bypass networking techniques for high-throughput media forwarding at scale
Security features development; TLS/mTLS session management, certificate lifecycle handling, and cipher suite negotiation in SIP stacks
Designing REST/gRPC-based northbound APIs for SBC configuration, monitoring, and OSS/BSS integration
Cloud Native and NFV-based architecture; containerizing SBC components with Docker and deploying on Kubernetes; HA and geo-redundant topologies
Understanding of NFV/MANO frameworks (ETSI NFV) and integration with VNFM/NFVO for lifecycle of virtualized SBCs
Knowledge of SBC security policies: topology hiding, header manipulation, DoS/DDoS rate limiting and blacklisting engines
Ability to design and implement SBC security policies and configurations
Experience with OSS/BSS integrations and monitoring tools
Accessibility and equal employment opportunity awareness
Experience with open-source/network software stacks and performance optimization tools

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