As you’ll probably have realised, a scalable app requires quite a different approach from the first demos and prototypes you built back in the day - you know, before the first techcrunch blog post.
Now your product will need to be able to deal with real visitors - hopefully lots of them - and your code base will need to keep up. That javascript refactoring, those unit tests that you put off for so long? Now’s definitely the time to catch up on that kind of stuff! Although we’ve worked with dozens of startups with similar needs to yours, we should really speak to you about what you require before going further.