Director of Voice Platform Engineering

Habitat For Humanity Of Durham; Durham (NC); On-site; USD 180,000 - 240,000; Full time

Job summary

Fidelity Investments seeks a Director of Engineering to lead the Voice Platform, shaping architecture and delivering scalable, reliable voice services. This senior role combines hands-on coding with strategic design across Kamailio and FreeSWITCH, APIs, and platform tooling.

You will mentor engineers, drive high-availability architectures, and partner with security, product, and architecture teams in Durham, NC.

Qualifications

• Bachelor’s or Master’s degree in computer science, electrical engineering, or related technical discipline or equivalent practical experience.
• 10+ years of software development experience with significant experience in voice, telephony, real-time communications, or programmable communications services.
• 5+ years of hands-on production experience with FreeSWITCH and Kamailio.
• Deep understanding of FreeSWITCH architecture and hands-on experience configuring, extending, embedding or integrating FreeSWITCH in production systems
• Deep understanding of Kamailio architecture and SIP-routing configuration.
• Experience integrating Kamailio with FreeSWITCH clusters, carriers, and SBCs.
• Experience developing distributed, event-driven, real-time, and low-latency services.
• Experience with relational and non-relational databases, distributed caches, and high-volume event processing.

Responsibilities

• Contribute to voice/telephony services architecture and build the programmable voice platform supporting inbound, outbound, transferred, conferenced, and multi‑party contact center interactions.
• Design and implement carrier‑grade SIP signaling and media‑processing capabilities using Kamailio and FreeSWITCH.
• Remain deeply hands‑on, contributing to production code, configurations, automation, prototypes, technical designs, test frameworks, and operational tooling.
• Platform design for SIP routing, session control, media services, conferencing, recording, playback, DTMP, codec negotiation, transcoding, and call‑state management.
• Develop reusable voice services and APIs that abstracts underlying telephony and enable teams to safely consume voice capabilities.
• Build and extend Kamailio routing logic, transcation handling, registration, toplogy hiding, load balancing, failover, authentication, and security controls.
• Build and extend FreeSWITCH applications, dial plans, modules, event itegrations, media services, and call‑control capabilities.
• Design for high availability, geographic redundancy, horizontal scalability, fault isolation, graceful degradation, and disaster recovery.
• Establish observability standards for the voice platform.
• Provide team technical leadership through design reviews, code reviews, mentoring, and direct participation in complex engineering work.
• Partner closely with architecture, product management, contact center engineering teams, security, networking, and quality engineering.
• Participate in production support and incident response for critical voice platform services.

Skills

C/C++

Java

Go

Real-time communications

Voice platforms

Education

Bachelor's or Master's in CS/EE

Tools

Kamailio

FreeSWITCH

Job description

Fidelity Investments seeks a Director of Engineering to lead the Voice Platform, shaping architecture and delivering scalable, reliable voice services. This senior role combines hands-on coding with strategic design across Kamailio and FreeSWITCH, APIs, and platform tooling.

You will mentor engineers, drive high-availability architectures, and partner with security, product, and architecture teams in Durham, NC.