SIP Engineer

VoIP Engineer

At Weave, we're on a mission to elevate the patient experience by giving healthcare practices the tools they need to run more efficiently and meaningfully connect with their patients. With 40,000+ customers and growing, Weave's all-in-one platform supports every interaction—from scheduling and payments to communication and reviews—making it easier for healthcare professionals to focus on what matters most: patient care. Weave is looking for a VoIP Engineer with a strong background in modern communication tools and cloud technologies to help maintain and optimize our distributed, cloud-based voice platform.

In this role, you'll ensure our communication systems are robust, efficient, scalable, and observable working hands-on with SIP/RTP infrastructure and core components like Kamailio, RTPengine, Free SWITCH, and Homer/HEPIC. You'll collaborate cross-functionally with engineering and operations teams to improve reliability, performance, and customer call quality while shipping improvements through Dev Ops best practices.

This position can be remote, in office, or hybrid

Reports to:

Engineering Manager

• Grow and manage a distributed cloud-based VoIP platform
• Optimize and troubleshoot Free SWITCH 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 Free SWITCH 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)

• Previous experience working as a VoIP network engineer
• Experience with VoIP applications such as Kamailio, OpenSIPS, Free SWITCH, 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 Dev Ops 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

• 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)

Employment with Weave is contingent upon the successful completion of a background check, conducted in accordance with applicable laws.

At Weave, we use Artificial Intelligence (AI) tools to help us work more efficiently and create a smoother candidate experience. AI may assist with things like writing job descriptions, scheduling interviews, or reviewing applications against job-related criteria. For additional information, please review the…