[warewolf]

20000 DAU 15% of the users open 100 times a day. This is higher than snapchats early stage data.

However we have recently been told by a big name investor he doesn't consider anything under 30k user validation. So I could be wrong.

My concern is that the product has bugs and backend isn't ready to support massive growth.

[niftich]

Load test your backend -- not the 'actual' production backend but a copy with the same characteristics. That is, call your backend functions in an order and manner that's consistent users' actual usage, with as many simultaneous requests as you can. There are many products that can do this, one free one is JMeter [1].

This will help you figure out if you can scale your way out of the problem (i.e. throw more servers at it), or if it's fundamentally broken beyond saving.

[1] http://jmeter.apache.org/

[warewolf]

I'll do some more research on this thanks.

[brianwawok]

Awesome that seems pretty good validation