Carrier Relations Engineer

Zoom is a leading communication platform that helps people stay connected and collaborate effectively. As a Carrier Relations Engineer, you will design and implement SIP trunking solutions while managing relationships with carrier partners, ensuring high-quality telecom services for millions of users worldwide.

Responsibilities:

• Designing, building and testing SIP trunking solutions for voice services, including redundancy, failover and capacity planning. Design and maintain carrier interconnects (IP and TDM where applicable) for voice and messaging traffic
• Performing end-to-end testing, turn-up, and acceptance of new carriers, routes and services. Analyze call flows, signaling (SIP), and media (RTP) to troubleshoot and resolve quality and interoperability issues
• Managing the relationships with assigned carrier partners, acting as the primary point of contact. Coordinate carrier escalations, outages, and maintenance activities through ticketing and escalation processes
• Monitoring carrier performance metrics (ASR, ACD, PDD, MOS, delivery rates) and drive continuous improvement. Support route optimization, cost management, and quality balancing initiatives
• Supporting and understanding carrier infrastructure for voice and SMS, including APIs, signaling, routing, and delivery mechanisms. Collaborating with internal teams to integrate carrier APIs for provisioning, routing, reporting and automation
• Ensuring carrier connections and services comply with local and international telecom regulations. Support regulatory requirements for new market entry, including numbering, CLI, SMS compliance, and lawful intercept obligations
• Supporting onboarding of new carriers and expansion into new geographic markets. Participating in technical due diligence for new carrier partnerships and services while providing engineering input for new product launches and service enhancements

Requirements:

• Bring experience with SIP trunking design, implementation, and troubleshooting
• Drive excellence in managing telecommunications vendors and suppliers
• Demonstrate solid understanding of carrier-grade VoIP, signaling (SIP), RTP, codecs, and call routing
• Have experience designing and managing carrier interconnects, including working knowledge of SMS infrastructure and carrier messaging flows
• Have familiarity with telecom APIs and system integrations, and working with carrier ticketing systems and escalation processes
• Bring understanding of telecom regulatory requirements across multiple regions along with troubleshooting, documentation and communication skills
• Own experience supporting large-scale, high availability telecom platforms and familiarity with 10DLC messaging and compliance