Smart-Home Edge AI Device Development

I am developing a smart-home edge AI device called MEGA.
I need an engineer to develop the core software platform / MEGA OS for an embedded Linux-based device, together with the backend architecture and web application.
The system must support:
Embedded Linux
Voice AI
Local/Edge AI
Wi-Fi / Bluetooth
MQTT
Matter / Zigbee integration
Device management
Local automation
Secure API
WebSocket real-time communication
OTA firmware/software updates
User accounts and permissions
Web dashboard
Device monitoring and configuration
Future camera/Vision AI support for MEGA Pro
MEGA Core and MEGA Pro must run the same MEGA OS architecture. MEGA Pro will additionally support camera-based vision and person recognition.
I am looking for someone capable of designing the architecture first, then developing a working MVP/prototype