I'd be curious whether this is robust enough to support an ecommerce app. How would one check whether this meets the security requirements for such besides the fact that it's build on Rack?
Padrino Developer here. Our team has developed several ecommerce applications using padrino for various contract jobs. Websites will be deployed soon with links available on http://padrinorb.com. Padrino is built directly on top of Sinatra and should meet any security requirements you might have.