Telecom Engineer II

IZT Cloud is hiring a Tier 2 Telecom Engineer to manage the day-to-day engineering of its Cloud Voice platform. The role configures and troubleshoots SIP, maintains voice infrastructure, manages number porting and PBX administration, supports compliance operations, and escalates technical issues to development.

Responsibilities:

• Contributing to a workplace culture consistent with IZT's mission, vision, and values
• Displaying strong interpersonal and communication skills leading to client satisfaction
• 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, and DNO list management
• Maintain accurate documentation of all engineering and support activities
• Providing on-call support as part of a scheduled rotation with other team members

Requirements:

• Self-motivated, able to make independent choices, free from immediate direction or supervision
• 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
• Strong written and verbal communication skills; your escalations make developers' jobs easier
• High School Diploma
• English
• 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
• Ability to troubleshoot and resolve technical issues in a timely and efficient manner
• Time management skills to fully utilize your time
• Ability to work independently and as part of a team
• Higher Education Preferred
• VoIP/Telecom engineering: 3 years (Preferred)
• SIP troubleshooting (Wireshark/sngrep): 2 years (Preferred)
• SBC administration: 2 years (Preferred)