Bear in mind that developer experience and smarts count for more than anything else (if you don't have those yet, don't worry - they will come with time, patien

Bear in mind that developer experience and smarts count for more than anything else (if you don't have those yet, don't worry - they will come with time, patience, and effort). That said, I would say that languages and technologies that help you achieve a more modular design will help you scale more. This makes it easier to tear things out and move them around so you can alter your architecture much more easily than you would otherwise. And of course efficiency (in terms of code performance) doesn't hurt either, but I wouldn't choose something on that alone. If you can have efficiency and modularity, so much the better!