ABOUT TELEGENT Telegent is a next-generation mobile communications platform redefining how businesses and brands connect people through wireless technology. We provide a software-first, API-driven mobile Platform-as-a-Service (mPaaS) that combines intelligent voice, messaging, data, and unified communications into a single, flexible solution. At Telegent, we move fast, think creatively, and build technology that makes mobile communications simpler, more powerful, and more adaptive for the future. ABOUT THE ROLE The Staff SIP Engineer is responsible for designing, implementing, and supporting carrier-grade SIP-based voice services across Telegent’s mobile and unified communications platforms. This role works closely with network engineering, product, operations, and carrier partners to ensure high availability, call quality, scalability, and regulatory compliance across our voice infrastructure. This is a hands-on role requiring deep SIP expertise, strong troubleshooting skills, and real-world carrier interconnection experience. WHAT YOU'LL DO Design, deploy, and maintain SIP-based voice services, including SIP trunking, interconnects, and call routing Manage carrier and partner integrations, including SIP peering, codec negotiation, and signaling normalization Troubleshoot complex call flow issues involving SIP signaling, RTP, NAT traversal, and media path failures Monitor and optimize voice quality metrics (MOS, ASR, ACD, PDD, jitter, packet loss) Configure and support SBCs, softswitches, and media gateways in production environments Collaborate with operations and NOC teams to support 24/7 voice services and incident response Ensure compliance with E911, STIR/SHAKEN, lawful intercept, and other regulatory requirements Participate in capacity planning redundancy design, and disaster recovery initiatives Create and maintain technical documentation, call flow diagrams, and operational run books WHAT WE'RE LOOKING FOR 8+ Deep expertise with OpenSIPS: configuration, scripting, and large-scale deployment Strong understanding of SIP, RTP, SRTP, and related VoIP and cellular signaling protocols Experience with cellular SIP (IMS, VoLTE, or interconnect/MVNO environments) strongly preferred Experience with SBCs and software platforms (e.g., Metaswitch, Sonus/Ribbon, Oracle, SBC, OpenSIPS, Kamailio, FreeSWITCH, Asterisk) Familiarity with AI development workflows and tools is strongly preferred Proven ability to diagnose and resolve complex signaling issues using tools like Homer, Wireshark, or sngrep Comfortable operating in a remote, high-autonomy environment Strong written communication skills: you can explain complex systems clearly to both engineers and stakeholders Familiarity with IMS architecture and interconnects Experience with cloud-based voice infrastructure (AWS, GCP, Azure) Track record of working across teams as a technical leader without a formal management role Experience supporting high-volume, high-availability voice platforms TECHNOLOGIES & TOOLS SIP, OpenSIPS, RTP / SRTP, VoIP, Cellular / IMS, VoLTE, mPaaS, FMC / MFC, Homer, Wireshark, sngrep, Linux BENEFITS Competitive compensation package, including performance-based bonus potential and comprehensive health benefits 100% employer-paid medical, dental, and vision Unlimited PTO Equipment provided