I have great knowledge and experience on following:
HTML
Css
Angular plarform
C#
C
I have done lot of project in angular paltform like e commerce user can buy prduct easily and seller can easily add product and also update product detail like product price and product description
For this website user can visit website any time any where but when he buy product first he/she can sing up and then he/she can buy product
Another project is student online system