I need a embedded system board designer

Our concept is a Micro mobility system. Smart bikes are distributed around the city for customer use and the customer can access the bike through a mobile application. The embedded system control board installed in each bike connects the bike to the control room and performs various tasks. The board consists of the following sections

1. Cellular communication module with built-in GPS/GNSS receiver:

The module should be 4G compatible and should have a built-in GNSS or GPS receiver. The main peripherals of the module will be a Sim card slot, GSM and GPS antennas, Status led indicators, and a reset button. This module should be connected serially to the microcontroller, consisting of a base application code.

2. Solid state relays:

Four relays on the board itself. Each relay should control the different hardware of the bike i.e., Motor, Horn, Headlight, and Brake light.

3. Accelerometer sensor:

The sensor tracks the vibrations and movement of the bike during the lock position of the bike.

4. Battery State of charge sensor:

The battery charge is monitored regularly by this sensor and the sensor data is given to the microcontroller instantly.

5. Microcontroller:

The cellular module, relays, and sensors all are connected to the microcontroller where the final application code is dumped. The microcontroller process the instructions from the cellular module and do the subsequent actions.

6. Onboard DC to DC converter:

A 48V DC battery source is available in the bike itself. The battery voltage should be converted into the power supply level of the microcontroller, cellular module, and other components in this block.