5+ years of hands-on engineering experience Strong Python skills for building and scaling AI voice agents Deep understanding of TTS/STT (e.g., ElevenLabs, Cartesia) Experience with real-time audio processing, latency optimization, interruption handling Experience with caching strategies for cost-effective TTS (e.g., Redis/RAG-based retrieval) Experience scaling to 100s of simultaneous calls Expertise in WebRTC, peer-to-peer voice systems Knowledge of function calling, live agent transfers, automated SMS/Email/WhatsApp Experience with SaaS architecture, multi-tenant design, Docker