Magento Extension created or modified

I have an extension that connects magento to my pos backend for product updates and stock levels. Problem is it just doesn't work right it either times out or runs our of allocated memory.

I need someone to look at the extension and improve or write it to keep the process cpu and mem requirements down.

I run a opensouce pos system called chromis which is a branch off of unicentaopos and I use the unicentaops extension to connect to magento.

Can you help and how much is it going to cost?