Telephony Engineer

Infrastructure/Telephony Architect (100% Remote | Up to 25% Travel)
(Five9 CCaaS | Google AI Integration | Enterprise Contact Center Transformation)
Overview:
Optomi, in partnership with a leading financial services client, is seek an Infrastructure / Telephony Architect to lead the architecture, design, and technical strategy for a large-scale enterprise contact center transformation initiative centered around Five9 CCaaS and Google AI integration.
This individual will serve as the technical lead across telephony, networking, cloud infrastructure, carrier connectivity, resiliency, and migration planning while supporting the transition from legacy telephony systems into a modern cloud-based contact center platform.
The ideal candidate will bring deep expertise in enterprise voice architecture, SIP infrastructure, carrier strategy, cloud networking, and highly available global environments.
This role is highly visible and will partner closely with infrastructure, telecom, networking, security, and business teams to deliver scalable, resilient, and globally compliant solutions.
Key Responsibilities:
Lead the end-to-end architecture strategy across telephony, networking, cloud infrastructure, carrier connectivity, and disaster recovery
Design and standardize enterprise Five9 CCaaS infrastructure including high availability, resiliency, failover, and multi-region deployment strategies
Architect network connectivity between Five9 cloud services, enterprise systems, carrier networks, and Google AI platforms
Define enterprise QoS standards, bandwidth requirements, latency thresholds, and voice performance optimization strategies
Own telephony architecture including SIP trunking, PSTN connectivity, Session Border Controllers (SBCs), dial plans, call routing, and failover design
Design global number management and number porting strategies across multiple regions and contact centers
Develop bridge architectures supporting coexistence between legacy telephony systems and Five9 during phased migration efforts
Establish security standards including TLS/SRTP encryption, IAM controls, segmentation, and compliance alignment
Support disaster recovery planning, operational readiness, and business continuity initiatives for mission-critical voice platforms
Partner with carriers, telecom vendors, networking teams, cloud engineering, and enterprise stakeholders throughout implementation
Lead architecture governance activities including technical reviews, standards development, and risk mitigation planning
Create architecture documentation including HLDs, network diagrams, data flows, and technical design artifacts
Required Qualifications:
7+ years of experience in Infrastructure, Telephony, Network, or Solution Architecture roles
Direct Five9 infrastructure and architecture experience including multi-region deployments
5+ years of hands-on experience supporting enterprise CCaaS platforms including Five9, Genesys Cloud, Amazon Connect, or NICE CXone
Deep expertise in SIP / SIP Trunking, PSTN connectivity, Session Border Controllers (SBCs), VoIP and enterprise telephony architecture, Call routing and failover strategies
Strong knowledge of SD-WAN, MPLS, QoS, and enterprise networking
Cloud infrastructure platforms including AWS, Azure, or GCP
Voice quality metrics including MOS, jitter, latency, and packet loss troubleshooting
Experience with carrier integrations and telecom vendor management, number porting and global telecom compliance requirements, disaster recovery and business continuity architecture, hybrid cloud and legacy coexistence environments
Experience with Infrastructure-as-Code and deployment automation practices
Strong understanding of security and compliance standards including TLS, SRTP, IAM, PCI-DSS, SOC2, and GDPR
Excellent communication and stakeholder management skills with the ability to translate complex technical concepts into business solutions
Experience within enterprise or highly regulated environments preferred

Work arrangement
Yes