Senior UC & VoIP Software Engineer – Cloud 911

Socket.dev; New York (NY); Hybrid; USD 141,000 - 216,600; Full time

Benefits offered by this job

Competitive salary and 401k with match

Discretionary time off

Paid parental leave

Medical, Dental, Vision plans

Fitness Programs

Emotional & Development Programs

Snacks in offices

Job summary

Axon 911's Carbyne Voice team is building the infrastructure that handles emergency calls — in the cloud. This is not a monitoring layer on top of existing telephony; it is the actual call-handling engine, responsible for every packet, every route, and every millisecond of uptime in a life-critical system.

As a Senior UC Software Engineer, you will help design, build, and maintain this infrastructure, ensuring that no call fails — ever.

Qualifications

• Deep experience with VoIP/UC systems and SIP protocol.
• Cloud platform experience, ideally AWS.
• Familiarity with open-source VoIP tools such as FreeSWITCH and Kamailio.
• Comfort operating in a cross-functional environment and communicate technical complexity clearly.
• Demonstrated ownership and accountability for life-critical systems.

Responsibilities

• Design and develop cloud-based voice infrastructure handling SIP routing and call state management.
• Build and maintain integrations with telephony providers, PSAPs, and external partners.
• Drive major features and architectural evolution of the voice platform.
• Collaborate with operations, networking, and engineering teams for visibility and reliability.
• Participate in on-call rotations or incident response for production voice infrastructure.

Skills

VoIP/UC systems

SIP protocol

Cloud platforms (AWS)

Cross-functional collaboration

Tools

FreeSWITCH

Kamailio

AWS

Job description

Axon 911's Carbyne Voice team is building the infrastructure that handles emergency calls — in the cloud. This is not a monitoring layer on top of existing telephony; it is the actual call-handling engine, responsible for every packet, every route, and every millisecond of uptime in a life-critical system.

As a Senior UC Software Engineer, you will help design, build, and maintain this infrastructure, ensuring that no call fails — ever.