Voice Platform Engineer – C++ & SIP

Job Title: Voice Platform Engineer – C++ & SIP
Job Type: Contract (Onsite)
Locations: Austin, TX & Sunnyvale, CA
Shift: Monday–Friday, Standard Business Hours

Job Summary

The Voice Platform Engineer will support and enhance enterprise voice and VoIP platforms with a focus on SIP-based communication systems. This role requires strong hands-on expertise in FreeSWITCH or Kamailio, deep knowledge of SIP/RTP protocols, and advanced C++ programming skills for telecom application development and optimization. The ideal candidate will work in high-availability production environments, troubleshooting voice platform issues while collaborating closely with customer and engineering teams.

Key Responsibilities

• Design, manage, and enhance enterprise voice/VoIP platforms
• Configure and support FreeSWITCH or Kamailio environments
• Troubleshoot SIP signaling, RTP streams, call routing, and call quality issues
• Develop and maintain dial plans and routing logic
• Perform production support activities in high-availability voice environments
• Develop and optimize telecom and voice applications using C++
• Debug and resolve performance-related issues in voice platforms
• Integrate telecom systems with backend services and enterprise applications
• Monitor platform stability, availability, and performance metrics
• Develop automation and operational scripts using shell scripting
• Work with Linux-based systems for deployment and troubleshooting
• Collaborate directly with customer teams in onsite delivery environments
• Create and maintain technical documentation, support procedures, and troubleshooting guides

Required Qualifications

• 7+ years of overall IT/telecom experience
• 4–5+ years of hands-on experience with SIP and C++ development
• Strong expertise with FreeSWITCH or Kamailio
• Deep understanding of SIP, RTP, VoIP protocols, and call routing
• Experience troubleshooting call quality and signaling issues
• Strong C++ programming and debugging skills
• Experience with Linux administration and shell scripting
• Familiarity with monitoring and observability tools
• Experience working in high-availability production support environments
• Strong analytical, troubleshooting, and problem-solving skills
• Excellent communication and collaboration abilities

Preferred Qualifications

• Experience integrating telecom platforms with backend enterprise systems
• Experience working in onsite customer-facing delivery roles
• Knowledge of scalable voice infrastructure and performance optimization

Work Environment & Additional Details

• Fully onsite role in Austin, TX or Sunnyvale, CA
• Enterprise VoIP and telecom platform environment
• High-availability production support and engineering responsibilities
• Direct collaboration with customer and engineering teams