IZT CLOUD Telecom Engineer II Southfield, MI · Full time Company website

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"Revolutionizing Business Communications Through Cloud Innovation" IZT CLOUD stands as a leader in cloud-based communication solutions, delivering enterprise-grade voice and collaboration services to organizations across the continental United States. Through our advanced Cloud Voice platform, we empower businesses to modernize their communication infrastructure, providing unified voice, messaging, and conferencing capabilities that enhance connectivity and drive operational efficiency.

About IZT Cloud

Life is short. Your relationship with IT doesn't have to be. IZT Cloud is the telecommunications division of IZT & Companies, delivering Cloud Voice UCaaS, SIP trunking, and messaging services with full STIR/SHAKEN, E911, and 10DLC compliance. As Yeastar's premier US technology partner, we run a modern, multi-tenant voice platform and we're growing fast.

The Role

We're hiring a Tier 2 Telecom Engineer to own the day-to-day engineering of our voice platform. You'll be the technical backbone of Cloud Voice: configuring and troubleshooting SIP, maintaining our SBC infrastructure, running number porting end to end, and acting as the escalation point between support and our development team. This role takes over core platform duties currently handled by another team member.

What You'll Do

• Configure and troubleshoot SIP trunks, endpoints, and carrier interconnects (registration, SDP/codec negotiation, NAT traversal, one-way audio, call quality)
• Maintain and monitor our SBC and voice infrastructure
• Manage LNP end to end: port-ins, port-outs, CSR/LOA validation, rejections, and carrier coordination with NPAC/SPID awareness
• Administer the Cloud Voice PBX platform: tenant provisioning, routing, features, and firmware
• Handle 10DLC campaign registration and messaging compliance (TCR, brand/campaign vetting, carrier surcharges)
• Serve as Tier 2 escalation: reproduce issues, capture SIP traces/PCAPs, and write clear, actionable escalations for the development team
• Support compliance operations: STIR/SHAKEN attestation, E911 provisioning, CNAM, DNO list management

What You Bring

• 3+ years in VoIP/telecom engineering or Tier 2 voice support
• Strong SIP fundamentals: you can read a packet capture (Wireshark/sngrep) and pinpoint the failure
• Hands-on SBC experience and Linux comfort
• Working knowledge of LNP/porting workflows and carrier processes
• Familiarity with 10DLC/A2P messaging registration
• Clear written communication: your escalations make developers' jobs easier

Nice to Have

• FreeSWITCH, Kamailio, or OpenSIPS experience
• Yeastar P-Series (or similar multi-tenant PBX) administration
• STIR/SHAKEN, E911, or telecom regulatory exposure
• Scripting (Bash/Python) or API experience

Why IZT

Small team, big scope. No layers of bureaucracy. You'll work directly with leadership and development, and your work ships. We keep businesses ahead, secured, and running smoothly, and we do the same for our people.