IoT PCB Design for Smart Scooter

I'm working under Ramen Electric Pvt. Ltd., and I’m building a smart electric scooter project. I already have the mobile app UI and backend ready, but now I need the hardware side, plus help integrating it with the app.

Here’s exactly what I need:

A custom IoT PCB (ESP32-based) with:
– GSM (SIM800L)
– GPS (NEO-6M or similar)
– Relay output for motor cut-off
– Buzzer output
– Optional UART/CAN to read data from LiFePO₄ BMS
– Power input from 12V/5V DC

I also need:
– Firmware flashed on the board that can communicate with my app (Firebase/MQTT or REST API)
– 1 to 2 fully assembled working boards shipped to me
– Guidance on how to integrate the hardware with my app

I will also share a document listing all the features I want on the app so you can help align the hardware outputs and events properly with it.

I accept your budget — but I expect A+ grade work in terms of:

PCB layout and quality

Firmware that works with my app backend

Neat schematic and BOM designed in EasyEDA or any industry-standard software

If you deliver well, I’ll definitely connect you for more upcoming projects as we grow our scooter line.

Please share your past work, estimated timeline, and whether you're comfortable with this scope.

Thanks!
Ramen Electric Pvt. Ltd