Full Stack Developer for Internal Business System

I'm looking for an expert Full Stack Developer skilled in JavaScript and MongoDB to build an internal business system for me. This isn't just any system; it will encompass stock management and POS (Point of Sale) capabilities.

Key requirements:
- Proficient in JavaScript and MongoDB
- Experience in developing internal business tools
- Excellent understanding of stock management systems
- Previous work with POS systems is a plus

Please provide examples of similar projects you've completed.