Voice/Telephony Engineer Company: Tekyz Tech Pvt Ltd, India Job Title: Voice Telephony Engineer Experience: 5+ years Location: Remote (India) Type: Contract - Freelancer Responsibilities: • Develop, configure, and maintain real-time communication stack (LiveKit, Twilio, WebRTC). • Optimize call flows, latency, jitter, and bandwidth for healthcare-grade reliability. • Integrate voice/video with backend APIs and AI stack. • Ensure secure, HIPAA-compliant handling of voice data. • Troubleshoot and monitor call performance in production. Requirements: • 4+ years in VoIP / RTC engineering. • Hands-on with LiveKit, Twilio APIs, WebRTC, SIP, RTP/RTCP. • Knowledge of STUN/TURN servers, scaling voice infra, call recording/analytics. • Healthcare/regulated domain experience preferred.