new features addition and design modification to existing salon system

I'm looking for a freelancer to modify and add new features to an existing salon system. Most importantly, I need assistance with appointment scheduling. Besides that, I will need help with inventory management and developing a customer loyalty program. In terms of design, I have specific ideas to be implemented. Primarily, this project aims to improve the user experience - creating an optimized workflow and a more efficient user interface. All suggestions will be reviewed to meet user desires while delivering the desired functionality.