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# SIP / VoIP Engineer

- **Company:** Cnoopy Services INC
- **Location:** Dallas, TX, United States (Remote available)
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** .NET Framework, ANSI C, User Authentication, VoIP, C Sharp (Programming Language), Software Quality, Software Debugging, Trunking, Session Initiation Protocols, Lua (Scripting Language), Routing, Node.Js, Software Engineering, Wireshark, TypeScript, WebRTC, Diagnostic Tools, Kamailio, Meditech
- **Published:** September 25, 2026
- **Apply:** https://www.dice.com/job-detail/95b283c1-50ac-4a48-8f03-6127f2665c83

## About the Role

* 10+ years of experience in SIP/VoIP technologies
 * Strong hands-on experience with Kamailio SIP Server
 * Expertise in SIP Protocol, SIP Routing, SIP Authentication, and SIP Trunking
 * Experience with FreeSWITCH deployment and integration
 * Development experience using Node.js and/or TypeScript
 * Strong troubleshooting and debugging skills in VoIP environments
 * Experience with RTP/media handling
 * Knowledge of VoIP monitoring and troubleshooting tools such as Wireshark, sngrep, and SIPp
 * Experience implementing secure communication solutions and VoIP security best practices
 * Background working in Medical Devices, Healthcare Technology, FDA-regulated, HIPAA-compliant, or other regulated industries
 * Experience creating technical documentation and design specifications
 * Strong software development, testing, and code quality practices

Preferred Skills

 * WebRTC
 * .NET / C#
 * Lua Scripting
 * Asterisk
 * ANSI C
 * Telecom or Unified Communications platforms, A strong candidate will have deep hands-on experience with Kamailio + FreeSWITCH integration, SIP routing and security, VoIP troubleshooting, and software development, preferably within Medical Device, Healthcare, MedTech, HIPAA, or FDA-regulated environments. Candidates with only generic VoIP experience and no Kamailio expertise will not be considered strong matches.

## Description

We are seeking an experienced Senior SIP / VoIP Engineer to design, develop, and maintain secure real-time communication solutions for medical device and healthcare technology products. The ideal candidate will have strong hands-on experience with Kamailio, SIP, VoIP, and FreeSWITCH and a proven track record working in FDA-regulated, healthcare, or other highly regulated environments., * Design, develop, and maintain SIP/VoIP communication systems for medical and healthcare products.

 * Configure and support Kamailio SIP infrastructure and FreeSWITCH platforms.
 * Develop secure, scalable, and reliable communication services using Node.js/TypeScript.
 * Troubleshoot SIP signaling, call routing, authentication issues, and media flow problems.
 * Perform root cause analysis using tools such as Wireshark, sngrep, and SIPp.
 * Support regulatory and compliance requirements for healthcare and medical device products.
 * Collaborate with engineering, QA, cybersecurity, and product teams to deliver compliant communication solutions.
 * Create and maintain technical documentation, architecture diagrams, and deployment procedures.