PHP / jQuery Website Development

We have a website that is already completed however we are getting server timeouts on a couple of the mobile scripts. I need assistance with this as quickly as possible. This is for a high traffic website so load time is essential. The issue may be in the function we are using to call the information from the database or it may be a quick 20 minute fix.

I will act as project manager on the job and will give all details as we move forward.