Telegent, Inc.

Role Description 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 Qualifications - 8+ years of 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

Role Description We're looking for a Staff C# Engineer to take deep ownership of the backend systems that power our AI mobile network. This is a high-impact individual contributor role: you will architect and build the scalable, production-grade services that sit at the core of Telegent's platform. This position is ideal for an engineer who enjoys working on API-driven platforms, modern cloud architectures, and mission-critical services. - Design, build, and own scalable backend services and APIs that power Telegent's AI mobile network platform - Lead architecture decisions for C#/.NET systems, ensuring reliability, performance, and maintainability at scale - Define and enforce engineering standards and best practices across backend development - Diagnose and resolve complex production issues across distributed systems and services - Drive improvements in system performance, observability, and operational reliability - Partner with AI and infrastructure teams to integrate intelligent capabilities into core platform services - Mentor senior engineers and serve as a technical resource across the organization - Evaluate and adopt new technologies and patterns that improve platform quality and developer productivity Qualifications - Advanced proficiency in C# and the .NET ecosystem - Strong experience building scalable, production-grade backend services - Proven ability to own system design and implementation end to end - Experience mentoring engineers and driving technical best practices - Solid understanding of distributed systems, APIs, and cloud-native architecture - Hands-on experience with Azure for cloud-native backend development and deployment - Deep experience with AI development workflows and tools is strongly preferred - Experience in the telecom industry is a strong bonus - Comfortable operating in a remote, high-autonomy environment - Strong written communication skills: you can explain complex systems clearly to both engineers and stakeholders Technologies & Tools - C# - .NET - REST - gRPC - SQL - Azure - Docker - CI/CD - Linux - mPaaS Benefits - Competitive compensation package, including performance-based bonus potential and comprehensive health benefits - 100% employer-paid medical, dental, and vision for you and dependents - Unlimited PTO - Equipment provided