Senior UC Software Engineer, Axon 911

Axon; Boston (MA); Hybrid; USD 141,000 - 198,000; Full time

Benefits offered by this job

Competitive salary

401k with employer match

Discretionary time off

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 Senior UC Software Engineer role focuses on designing, building, and maintaining a scalable voice platform to ensure every call is reliable for PSAPs nationwide.

You’ll work in a hybrid role with four days per week in Boston, helping evolve a cloud-native, life-critical system and collaborating closely with operations, networking, and engineering teams.

Qualifications

• Experience with VoIP/SIP-based applications and systems.
• Cloud platform experience in building distributed fault-tolerant services.
• Familiarity with FreeSWITCH and Kamailio.
• Ability to work across networking, operations and product teams.
• Demonstrated ownership and responsibility for critical live systems.

Responsibilities

• Design and develop cloud-based voice infrastructure for emergency 911 systems.
• Build and maintain integrations with telephony providers, PSAPs, and partners to ensure call reliability.
• Drive major features and architectural evolution of the voice platform.
• Collaborate with operations, networking, and engineering for system visibility and reliability.
• Participate in on-call rotations for production voice infrastructure.

Skills

VoIP/UC

SIP protocol

AWS cloud

FreeSWITCH

Kamailio

Cross-functional

Accountability

Job description

Join Axon and be a Force for Good.

At Axon, we’re on a mission to Protect Life. We’re explorers, pursuing society’s most critical safety and justice issues with our ecosystem of devices and cloud software. Like our products, we work better together. We connect with candor and care, seeking out diverse perspectives from our customers, communities and each other.

Life at Axon is fast-paced, challenging and meaningful. Here, you’ll take ownership and drive real change. Constantly grow as you work hard for a mission that matters at a company where you matter.

About Axon 911

Axon 911 brings together Prepared and Carbyne under Axon. Together, we are creating the only platform that combines modern 911 infrastructure with an AI intelligence layer—helping public safety agencies move faster, make better decisions, and deliver better outcomes in the moments that matter most.

911 is the backbone of public safety, yet the professionals behind it have long been held back by outdated technology. Axon 911 is here to change that. Joining this team means more than taking a job—it means helping shape the future of emergency response and building a safer, more connected world.

Position Overview

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. Your work will directly influence the reliability of 911 dispatch for PSAPs across the country, while advancing one of the most novel cloud-native voice platforms in public safety.

This is a hybrid role , with an expectation of four days per week in our Boston office.

What You’ll Do

• Design and develop cloud-based voice infrastructure handling SIP routing, call state management, and redundancy for emergency 911 systems
• Build and maintain integrations with telephony providers, PSAPs, and external partners, ensuring end-to-end call reliability in production environments
• Drive major features and architectural evolution of the voice platform
• Collaborate closely with operations, networking, and engineering teams to ensure system visibility, reliability, and alignment on infrastructure changes
• Participate in on-call rotations or incident response for production voice infrastructure, given the zero-failure requirement of the system

What Makes You a Great Fit

• Deep experience with VoIP/UC systems and SIP protocol. You have written or integrated SIP-based applications and can speak fluently about the protocol’s behavior
• Cloud platform experience, ideally AWS. You understand how to build distributed, fault-tolerant systems in the cloud, not just in hardware-based telecom infrastructure
• Familiarity with open-source VoIP tools such as FreeSWITCH and Kamailio. Direct experience with these is a strong signal; adjacent experience is welcome
• Comfort operating in a highly cross-functional environment. You work fluidly with networking, operations, and product teams and communicate technical complexity clearly
• We believe this role requires someone who thrives under meaningful responsibility. Someone who understands that every call handled well is an opportunity to help, support, and ultimately save lives

Benefits that Benefit You

• Competitive salary and 401k with employer match
• Discretionary time off
• Paid parental leave for all
• Medical, Dental, Vision plans
• Fitness Programs
• Emotional & Development Programs
• And yes, we have snacks in our offices

Base Pay Range

$141,000—$198,000 USD

Don’t meet every single requirement? That’s ok. At Axon, we Aim Far. We think big with a long-term view because we want to reinvent the world to be a safer, better place. We are also committed to building diverse teams that reflect the communities we serve.

Studies have shown that women and people of color are less likely to apply to jobs unless they check every box in the job description. If you’re excited about this role and our mission to Protect Life but your experience doesn’t align perfectly with every qualification listed here, we encourage you to apply anyways. You may be just the right candidate for this or other roles.

Important Notes

The above job description is not intended as, nor should it be construed as, exhaustive of all duties, responsibilities, skills, efforts, or working conditions associated with this job. The job description may change or be supplemented at any time in accordance with business needs and conditions.

Some roles may also require legal eligibility to work in a firearms environment.

We collect personal information from applicants to evaluate candidates for employment. You may request access, deletion, or exercise other CCPA rights at [e-mail] or via our Axon Privacy Web Form. For more information, please see the Your California Privacy Rights section of our Applicant and Candidate Privacy Notice.

Axon’s mission is to Protect Life and is committed to the well-being and safety of its employees as well as Axon’s impact on the environment. All Axon employees must be aware of and committed to the appropriate environmental, health, and safety regulations, policies, and procedures. Axon employees are empowered to report safety concerns as they arise and activities potentially impacting the environment.

We are an equal opportunity employer that promotes justice, advances equity, values diversity and fosters inclusion. We’re committed to hiring the best talent — regardless of race, creed, color, ancestry, religion, sex (including pregnancy), national origin, sexual orientation, age, citizenship status, marital status, disability, gender identity, genetic information, veteran status, or any other characteristic protected by applicable laws, regulations and ordinances — and empowering all of our employees so they can do their best work. If you have a disability or special need that requires assistance or accommodation during the application or the recruiting process, please email [e-mail]. Please note that this email address is for accommodation purposes only. Axon will not respond to inquiries for other purposes.