SIP / VoIP Engineer

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.

• 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.