Voice Infrastructure Engineer

About the RoleWe're building the future of contact center communications, and we're looking for an exceptional Voice Infrastructure Engineer to architect and implement enterprise-grade voice technologies that will power thousands of customer interactions daily.If you're passionate about real-time communications, VoIP, and creating seamless voice experiences at scale, this is your opportunity to make a massive impact.What You'll BuildYou'll be the technical architect behind the complete voice infrastructure stack, including:Intelligent IVR Systems- Conversational AI-powered self-service using modern ASR/NLU/TTS engines - Integration with Deepgram Nova-2, Claude Sonnet 4, ElevenLabs Turbo - Dynamic call flow orchestration with 60-80% containment ratesPredictive Dialer Platform- ML-optimized pacing algorithms for maximum agent productivity - Advanced Call Progress Analysis (CPA) with 95%+ accuracy - TCPA-compliant outbound calling with real-time abandonment rate controlSIP Trunking & WebRTC Infrastructure- Multi-provider SIP trunk architecture (Twilio, Bandwidth, Telnyx) - Session Border Controller (SBC) implementation for security and QoS - Browser-based WebRTC softphones for agents - TLS/SRTP encryption and fraud preventionVoice Quality Optimization- Real-time monitoring dashboards (MOS, latency, jitter, packet loss) - Codec negotiation and transcoding (G.711, G.729, Opus) - RTCP analysis and quality alerting systemsWhat We're Looking ForTechnical Expertise:- Deep knowledge of SIP protocol, RTP/SRTP, and VoIP fundamentals - Experience with WebRTC and real-time communications - Proficiency in Node.js/TypeScript or Go/Rust for high-performance systems - Hands-on experience with Twilio, Bandwidth, or similar SIP trunk providers - Understanding of audio codecs, QoS, and network protocolsContact Center Technologies:- Experience building or implementing IVR systems - Knowledge of predictive/progressive dialers and pacing algorithms - Understanding of ASR, NLU, and TTS technologies (Deepgram, AssemblyAI, ElevenLabs) - Familiarity with call routing, skills-based distribution, and ACD systemsArchitecture & Scale:- Proven ability to design highly available, fault-tolerant voice systems - Experience with multi-region deployment and redundancy strategies - Knowledge of PostgreSQL/TimescaleDB, Redis, and distributed systems - Cloud infrastructure experience (AWS, GCP, or Azure)Compliance & Security:- Understanding of TCPA, FCC regulations, and DNC requirements - Experience implementing TLS/SRTP encryption and security best practices - Knowledge of fraud detection and prevention mechanismsBonus Points- Experience with ML/AI integration for voice analytics and optimization - Contributions to open-source telephony projects (FreeSWITCH, Asterisk, Janus) - Background in speech analytics, sentiment analysis, or voice biometrics - Experience with Homer SIP capture, Prometheus/Grafana, or voice monitoring tools - Knowledge of STIR/SHAKEN and robocall mitigationWhat You'll Get✅ Autonomy & Ownership - You'll architect and build our voice infrastructure from the foundation up✅ Cutting-Edge Tech Stack - Work with the latest in AI, voice, and real-time communications✅ Impact at Scale - Your work will power millions of customer conversations✅ Collaborative Team - Work alongside talented engineers who value innovation and quality✅ Growth & Learning - Exposure to emerging technologies in conversational AI and voice automation✅ Competitive Compensation - comprehensive benefits, and flexible work arrangementsHow to ApplyIf you're excited about building the future of voice communications and want to work on challenging, impactful problems, we'd love to hear from youSend us:- Your resume highlighting relevant VoIP/telephony experience - A brief note about the most complex voice system you've built - Links to any public projects or GitHub repos (if available)Email: careers@simetrix-solutions.com