Smart signal Gadget Development

I'm seeking a skilled developer to create a smart wearable gadget integrated into a shoe. This device will provide silent vibration feedback based on button inputs, primarily for covert communication purposes.

Key Requirements:
- Input System: Use of Force Sensing Resistor (FSR) for button press
- Output System: Coin-type ERM vibration motor for silent haptic feedback
- Microcontroller: Raspberry Pi Zero 2 W, programmed with Python
- Power: Rechargeable Li-ion Battery (3.7V 1200mAh) with TP4056 & Boost Module
- Circuit: Fully functional circuit including transistors, resistors, and switches
- Form Factor: Neatly integrated into or attachable to a shoe
- Silent Operation: No sound or display, only tactile feedback
- Use Case: Initially for covert chess communication, but with potential for other applications
- Ability to indicate different types or patterns of signals through vibration

Ideal Skills and Experience:
- Experience with Raspberry Pi and Python programming
- Proficiency in circuit design and integration
- Knowledge of haptic feedback systems
- Experience with FSR and battery management systems
- Ability to design compact, wearable technology

Please provide examples of similar projects and your approach to ensure a compact and functional design.