Senior Python Engineer for Voice AI

We are a software company building an AI voice calling platform. We need a senior engineer to review our codebase, advise on architecture and security, join client technical calls, and build features over time. Must have: - 5+ years Python (FastAPI) - Real-time voice or WebRTC experience (LiveKit is a big plus) - LLM APIs in production - Security review experience - Professional Arabic and English Nice to have: SIP / Asterisk, PostgreSQL, Redis, Docker. Part-time, flexible hours, available for calls in Saudi time. NDA required.