Fix Bugs in Existing POS

I'm in need of a skilled developer with experience in POS systems to help rectify some bugs. ** I want to develop some new modules for my system. I want to add payment gateway, HRM, woocommerce modules to my system... (Budget: $8 - $15 USD, Jobs: Database Management, Laravel, MySQL, Payment Gateway Integration, PHP, Software Architecture, Software Development, Vue.js Framework)