Design Circuit Schematic & PCB (95×95 mm) for ESP Development Board + 12V Relay + GSM Module + Power Supply

I need an electronics engineer to design a complete circuit schematic and PCB layout within a 95 mm × 95 mm board size.
The PCB will integrate an ESP development board, a 12V relay, a GSM module, and a common power supply for all components.
Detailed Requirements:
1. Microcontroller Section
ESP32 development board
All required pins must be brought out / interfaced clearly
Antenna keep-out area should be considered for WiFi
2. Relay Section
12V relay (30A)
Optocoupler-based isolation preferred
Transistor + flyback diode must be included
Screw terminal for load output
3. GSM Module Section
SIM800
Proper SIM slot footprint
Audio pins not required
4. Power Supply Section
Input: 12V DC
Regulated outputs:
12V for relay
5V for GSM module
3.3V for ESP
Buck converter preferred (7805 is not preferred due to heat)
Reverse polarity protection
Test points for all power lines
5. PCB Requirements
PCB Dimension: 95 mm × 95 mm maximum
Through hole components prefferd
Clear silkscreen labels
Separation between high-current relay track and ESP/GSM low-signal area
Mounting holes included
Proper EMI/ESD design considerations
Use of standard components (easy to source)
6. Deliverables
Complete schematic in A EasyEDA
PCB layout files
Gerber files ready for manufacturing
BOM (Bill of Materials)
3D PCB view
Optional: PDF schematic