Maak eMagenot Mobile Version + Add-ons and Website update

The last 3 months our website is too slow. Sales are lower than last year. The site is not that steady anymore, I want to come in contact with somebody who can do all these points for us. Currently we are working with version 1.5 of Magento. We really need to have a site which can you upgraded/updated when needed. I want to make a plan with you, on the short term - because the high sales season is coming really quick - and for the long term. Are you experienced with Magento, with the technique of using plug-ins and also to keep in mind the way to build up good links for google etc. Also to perfect the way we use our custom filters. Are you the one to help us? We want to work on project basis. First project: 1. our mobile skin - pick a template together and finetune it according to our local webshop ([login to view URL]) 2. install add on and improve website on several points (key points: speed / navigation / design / google-proof / newest Magento version!) All must be developed on an extern server, we can't have any live downtime! What can you do for us, start chatting please! Please tell us why you are the one to be hired!