Wordpress complex lightbox customization

Hi, we have a Wordpress site where users can add a Pin - its similar to Pinterest, so please be familiar with Pinterest before bidding on this project. A user clicks a button that opens a lightbox where they can upload an image, add info about the image, add it to Google maps, etc. This is built and working, but we need it customized so the process is in steps - step 1, step 2, etc. And we need better form validation added - not just using js Alert. We also need an existing function to add an album, added to the lighbox. So basically you will need to know Wordpress well, PHP, javascript (jQuery please) and CSS as this needs to be styled as well and to be responsive - not just for desktop. If you are interested message me and I will provide links to the site so you can take a look. Thanks Rob