if your goal is to demo to raise money, the front end. Nobody spending cash wants to see how you&#x27;ve implemented cache or integrated twitters api.<p>If your goal is to have a minimum viable product (mvp), you want to identify the least amount of work to do both front and back end to where they will function (or fake) the functionality needed to demo or open to alpha.<p>facorreia is right, though, without a functional use case, you&#x27;re wasting your time.