E-commerce Functionality Enhancement

I need assistance with enhancing the functionality of my website to incorporate a reliable online store. This store will cater to individual customers, enabling employees to make purchases online. The ideal freelancer for this project should have:

- Expertise in e-commerce website development
- Proficiency in troubleshooting e-commerce functionalities
- Knowledge in implementing user-friendly interface for product search and filtering
- Experience with secure payment gateway integration
- Skills in troubleshooting and ensuring a seamless online shopping experience

Your role will primarily focus on troubleshooting and ensuring the e-commerce capabilities of my website are working correctly and efficiently.