Metal Detector PCB Design

I'm looking for an experienced specialist to design the schematic and PCB for a metal detector to be used in the food industry on a production line.

Key requirements:
- Detect both ferrous and non-ferrous metals
- Incorporate an automatic product learn feature
- Support multi-frequency operation
- Offer variable sensitivity settings

Ideal Skills & Experience:
- Background in electronics and PCB design
- Experience with metal detection technology
- Knowledge in designing for industrial food safety applications
- Strong attention to detail and accuracy

Please include relevant work samples with your bids.