Staff SIP Engineer

What You Will Own

• Grow and manage a distributed cloud-based VoIP platform
• Optimize and troubleshoot FreeSWITCH and Kamailio configurations for performance, resiliency, and reliability
• Design, build, test, deploy, and maintain services that support the voice platform
• Monitor and analyze VoIP network performance, identify areas for improvement, and implement solutions to enhance quality and efficiency
• Troubleshoot and resolve VoIP-related issues including call quality problems, signaling/connectivity issues, and system outages
• Develop Golang-based microservices and containers that support the voice ecosystem
• Deploy and operate services in Kubernetes environments
• Maintain and configure Kamailio and FreeSWITCH instances
• Implement and improve observability for SIP/RTP flows using HEP/Homer and telemetry (metrics/logs/traces) to accelerate incident response and root-cause analysis
• Partner with SRE/Platform teams to improve CI/CD, infrastructure-as-code, and reliability practices (e.g., automated rollouts, canarying, and repeatable environments)

What You Will Need to Accomplish the Job

• Previous experience working as a VoIP network engineer
• Experience with VoIP applications such as Kamailio, OpenSIPS, FreeSWITCH, RTPengine, and Asterisk
• Experience with troubleshooting tools such as Wireshark, sngrep, and Homer
• Deep understanding of TCP/IP networks, firewalls, and related protocols (SIP, RTP, RTCP, TLS, ICE, STUN, TURN, WebRTC)
• Programming experience with a major language such as Go, Java, or C
• Experience with scripting languages such as Python, Bash, and LUA
• Experience with DevOps tools for cloud infrastructure management and automation such as Terraform and Ansible
• Flexibility and adaptability in learning new technologies and tools
• Strong written, oral, and interpersonal communication skills
• Highly self-motivated and directed
• Keen attention to detail
• Experience operating production services in a major cloud environment (Google Cloud preferred), including networking concepts such as VPCs, load balancing, service discovery, and IAM/security fundamentals
• Comfort participating in on-call rotations and driving incident remediation through postmortems and follow-up engineering work

What Will Make Us Love You

• 5+ years of experience designing and supporting large scale VoIP networks
• Certifications in Kamailio or OpenSIPS
• Hands-on experience with Kubernetes operations (deployments, services/ingress, Helm/Kustomize, autoscaling, and debugging)
• Experience designing or improving call-quality tooling (MOS/RTCP analytics, jitter/loss monitoring, SBC/edge routing strategies, or capacity planning)