TaxValet is hiring a Lead VoIP Engineer to design and build high-performance modules within our Voice platform. This is a hands-on execution role ideal for engineers who love building, debugging, and optimizing real-time communication systems. Our culture is built on telling the truth, keeping customers as our north star, and believing nothing is impossible.

What You'll Do

Implement core voice capabilities using FreeSWITCH, Kamailio, and RTPEngine.
Build and optimize SIP call routing logic, RTP media relays, failover mechanisms, and NAT traversal.
Develop and manage configurations for scalability, codec negotiation, and SIP trunk registration.
Implement and test features like call recording, IVR, voicemail, and DTMF detection.
Monitor live traffic and participate in a 24x7 on-call rotation for critical escalations.
Collaborate with QA on stress/load testing and with Backend teams on provisioning APIs.
Document design decisions, configurations, and troubleshooting runbooks.
Troubleshoot and debug production issues, providing timely resolutions.
Stay up-to-date with emerging technologies and industry trends, identifying opportunities for innovation and improvement.
Collaborate with DevOps teams to ensure smooth deployment and operation of backend services in the AWS cloud environment.

What We're Looking For

8+ years of experience building and operating VoIP systems or CPaaS platforms.
Solid expertise with SIP signaling, RTP, and media relay techniques.
Strong hands-on experience with FreeSWITCH, Kamailio/OpenSIPs, and RTPEngine.
Hands-on experience with Session Border Controllers (SBC), Media Servers, and WebRTC.
Experience in managing telephony infrastructure for uptime, latency, and call quality optimization.
Strong systems programming and debugging skills in C/C++.
Good scripting/debugging skills (Bash, Python, or Lua for FreeSWITCH modules).
Proficiency with diagnostic tools like Homer, VOIPMonitoring, Wireshark, and tcpdump.
Experience working with geographically distributed infrastructure or HA deployments.