Diana and Elena,
We've also created and published a Shopify app, http://fetchapp.com over two years ago.
Basically, we know Shopify inside and out, and have a bulk of work to prove it!
We already have a theme that we need some modifications
have a look at our website and let me know what you can do and for how much, we don't have a big budget, but we really need this....Urgently
thank you !