Plugin development from scratch, Bots Protection, Creating AMP Compatible pages, Integrated Multiple paid WordPress Plugins, Paypal Payment Gateway Integration, Order Management, Email Notifications, Embed license feature with Daily License Check Scheduler, JSON output from plugin to make it compatible with Iphone/Ipad, Auto update plugin from a remote server, Created several custom shortcodes (e.g. QR-Code Generation and Auto-Login, Add custom fields to Comments/Replies, etc), Create custom widgets, Dynamic calendar task scheduling, Filter Items, Search Items, Forget Password feature, etc. Convert Website HTML design to WordPress Themes.