Apply small custom changes in Woocommerce 2.5

We are in the middle of project code base update. We would need a new member in our team to take care of applying small changes to Woocommerce 2.5. The changes will take places in the following files: - Layered Navigation residing in [login to view URL] - Price Filter residing in [login to view URL] The changes include: - combining a search attribute value for a specific attribute from 2 defined attribute fields, instead of the current behavior of one. - price filter using a different field to fetch data from, instead of the default Price field, and to load dynamically the min and max values. You can use our current code from WC 2.0.12 to help you understand and deal the changes easier. As well as we will support you with any necessary answers, explanations etc., when needed. We are looking for a developer with experience in Woocommerce, MySQL and PHP. Additional reward will be applied on successful project completion.