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 Mavenir SBC products on control and media plane
Customer support for deployed networks
Work closely with Test and Operation teams for product support
UT/IT development
Job Requirements
Core SIP & IMS 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
strong Experience with Diameter protocol development (Rx, Gx, Gy, Cx interfaces) and SCTP transport implementation
C/C++ System Programming
must-have Expert-level C/C++ (C++14/17) for high-performance, low-latency signaling and media processing components
must-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)
strong Scripting in Python or Bash for automation, build tooling, and CI/CD pipeline integration
nice Experience with Rust for safety-critical components or Go for microservice-based SBC architectures
Media Plane and RTP Development
must-have Solid understanding of RTP/RTCP, jitter buffers, packet loss concealment, and RTCP-based QoS feedback mechanisms
must-have 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
nice Familiarity with DPDK or kernel-bypass networking techniques for high-throughput media forwarding at scale
Security Feature development
must-have Experience developing TLS/mTLS session management, certificate lifecycle handling, and cipher suite negotiation in SIP stacks
must-have Ability to design and implement SBC security policies: topology hiding, header manipulation, DoS/DDoS rate limiting and blacklisting engines
strong Understanding of lawful intercept (LI) standards (ETSI TS 102 232, CALEA) and their integration into SBC architectures
Cloud Native and NFV architecture
strong Experience containerizing SBC components with Docker and deploying on Kubernetes, including HA and geo-redundant topologies
strong Understanding of NFV/MANO frameworks (ETSI NFV) and integration with VNFM/NFVO for lifecycle management of virtualized SBCs
strong Designing REST/gRPC-based northbound APIs for SBC configuration, monitoring, and integration with OSS/BSS systems
Testing and Software quality
must-have Ability to write unit and integration tests for SIP/media components; familiarity with GoogleTest, CppUnit, or equivalent frameworks
must-have Proficiency in using Wireshark, tcpdump, and SIP trace analysis for root cause analysis during development and regression testing
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.
