Chevereto Custom Code

Hi Am looking for a developer having experience in Chevereto. We need to modify/extend existing system to meeting are requirements. Some of the requirement are: - Adding new fields to the Image upload page. - Modify existing search to search data from these newly added fields. - Additional controls on Admin side and Front end for displaying images. - Customize theme. Please share the details on your experience for such kind of work and the per hour rate for same. Thanks !!