Smart Dog Collar Tech

I'm seeking an experienced hardware engineer to design a compact, smart dog collar attachment. The ideal size is under 70mm and must be waterproof.

Essential components include:
- Blues Wireless Notecard
- MCU for PCB communication
- Accelerometer (speed measurement)
- Temperature sensor (ambient temperature)
- Bark detection (microphone chip)
- USB rechargeable battery and charging capabilities

Ideal Skills and Experience:
- Expertise in embedded systems design
- Proficiency in PCB design and miniaturization
- Experience with wireless communication modules
- Knowledge of sensors and battery integration
- Ability to create waterproof enclosures

Please provide a portfolio showcasing similar projects.