Director, Voice Platform Engineering — Real-Time Telephony

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

Job summary

Fidelity Investments in Durham, NC seeks a Director of Engineering for the Voice Platform, delivering highly reliable, scalable telephony services. This hands-on leadership role combines system design, production coding, and platform development with Kamailio and FreeSWITCH.

You will mentor engineers, shape platform architecture, ensure uptime, and collaborate with security, architecture, and product teams to advance an API-driven voice stack for contact center workloads.

Qualifications

• Bachelor’s or master’s degree in computer science, electrical engineering, or related 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.
• Expert-level understanding of voice protocols.
• Familiarity with session border controllers and telecomunications security patterns.
• Strong software engineering skills in C, C++, Java, or Go.
• 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.
• Experience deploying and operating voice workloads in Cloud, hybrid-cloud, or geographically distributed environments.
• Proven experience mentoring senior engineers and raising engineering standards across teams.
• Hand-on experience with AI-assisted software development tools to accelerate implementation, testing, documentation, and troubleshooting while maintaining engineering quality and security standards.
• Demonstrated ownership of production services, including incident response, root-cause analysis, remediation, and continuous reliability improvements.

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, DTIM, 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

Distributed systems

Education

Bachelor’s or Master’s in CS/EE/related

Tools

Kamailio

FreeSWITCH

Job description

Fidelity Investments in Durham, NC seeks a Director of Engineering for the Voice Platform, delivering highly reliable, scalable telephony services. This hands-on leadership role combines system design, production coding, and platform development with Kamailio and FreeSWITCH.

You will mentor engineers, shape platform architecture, ensure uptime, and collaborate with security, architecture, and product teams to advance an API-driven voice stack for contact center workloads.