Digital Product Sales Web App

I'm looking for a developer to create a web app that enables users to buy digital products or downloadable files. The app should facilitate an easy and secure purchasing process. Essential Features: - User Accounts: Customers should be able to create accounts and view their past purchases. - Immediate Access: After payment, customers should be able to download their purchases instantly. Ideal Skills and Experience: - Proven experience in web app development, particularly for e-commerce platforms. - Strong knowledge of secure payment gateways. - Ability to create user-friendly account management interfaces. Please share your portfolio and relevant experience.