SIP Software Engineer(FreeSWITCH)

Remote • Posted 1 hour ago • Updated 1 hour ago
Contract W2
Contract Independent
Contract Corp To Corp
No Travel Required
Remote
Depends on Experience
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Fitment

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Job Details

Skills

  • SIP
  • VOIP
  • Freeswitch

Summary

 

le Summary

We are looking for a VoIP/SIP Software Engineer to design and build real-time voice communication systems. The role requires strong expertise in SIP protocol, VoIP architecture, and C/C++ development, with hands-on experience in platforms like FreeSWITCH.


Key Responsibilities

  • Design and develop SIP-based VoIP applications and services
  • Work on SIP signaling (INVITE, REGISTER, BYE) and call flows
  • Develop and maintain SIP stack / SIP UA components
  • Build and customize solutions using FreeSWITCH
  • Integrate with media gateways, SBCs, and telephony systems
  • Debug and troubleshoot call quality, latency, and signaling issues
  • Collaborate with cross-functional teams to deliver scalable real-time communication systems

Must Have Skills

  • Strong experience in VoIP / SIP (5–10 years)
  • Hands-on with SIP stack / SIP UA development
  • Experience with FreeSWITCH (2–5 years)
  • Strong programming skills in C/C++
  • Solid understanding of RTP/RTCP, codecs, and call flows

Good to Have

  • Experience with SIP media gateways / Session Border Controllers (SBCs)
  • Exposure to Asterisk or similar VoIP platforms
  • Knowledge of network protocols (TCP/IP, UDP)
  • Experience with Linux-based systems

Ideal Candidate

  • Comes from telecom / VoIP product background
  • Hands-on low-level protocol development
  • Strong debugging and performance optimization skills
  • Experience building high-scale real-time voice systems

 

Employers have access to artificial intelligence language tools (“AI”) that help generate and enhance job descriptions and AI may have been used to create this description. The position description has been reviewed for accuracy and Dice believes it to correctly reflect the job opportunity.
  • Dice Id: 91165420
  • Position Id: 185-38949-
  • Posted 1 hour ago

Company Info

About United Technology

At United Technology, we specialize in connecting businesses with exceptional tech talent that drives innovation and accelerates growth. With an extensive network of highly skilled professionals in fields such as software development, cybersecurity, data science, cloud computing, and IT infrastructure, we match the right individuals to the right opportunity.

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