This is going to sound like a rant - please take it as free advice and worth every penny.
Don't get me wrong, the folks you hired may well be peaches and we love them. But the world has changed - Instagram scaled to ridiculous levels with 8 people and no HR department. Build out operations - you mean repeatable processes right? If they are not already scripts on a server make them so.
You don't need people who deal with the processes of scaling or building out. You need source control tools.
Everything that is repeatable is automatable. Anything being done for the first time is a human's domain.
Everything else is either scripted and so zero marginal cost or is an anchor on your profitability.
I can really recommend this book http://www.amazon.co.uk/Race-Against-The-Machine-ebook/dp/B0...