Improving / Fixing code & forms in JavaScript/JQuery/JSON - GOOD COMMUNICATION ESSENTIAL!

This job is comprised of two interlinking parts. Firstly, I have a 4 different forms that are used to gather customer information about a specific product. Each form has about 100-150 fields. The forms can export the data in JSON format once filled, and they can also take in a JSON string and use it to self-complete (meaning that if you want to visually edit existing JSON data exported from the form previously, you can). These forms however have bugs, whether it be that some fields are/are not showing when they need to, or that the form is not self-completing in correctly using existing JSON data. I need all of these issues ironed out. I have a variable list for each form which specifies the name of each variable and the format in which it should be exported that you can use to help you fix the bugs. The second parts consists of fixing bugs with a collection of scripts that fill in forms on external webpages. There are about 4 scripts for each product, and each product has one form (the forms you will be fixing). All of the scripts for an individual product will use the data exported from that form to fill in an external form. This means that the scripts need to all take in data in the same format (e.g. one can't use a date in DD-MM-YYYY format while another script uses MM-DD-YY format). You will also need to ensure that they work with the JSON data exactly as it is exported from the form. Then these scripts will need to be tested properly. I can provide one or two pieces of test data, however you will need to create your own to cover as many possible different values for each variable (as specified in the variable list), and that will have to be run through each script for that product until they work without any bugs or catches. Then obviously you have to repeat this on all 4 products. So both the forms and the scripts will need to link together so that in the end a form can be filled in with data, the data exported and instantly used to fill in the external forms. The idea is that this process can eventually be completely automated. A freelancer with good communication is essential, as frequent updates on the bug fixes and improvements need to be highlighted so that progress can be documented and witnessed. Several freelancers have let me down on this project unfortunately. The opportunity for a considerable amount of work is available to the freelancer who is able to satisfy my very reasonable requirements. This project is likely to be over 30hrs of work, but perhaps more depending on how it develops. Enthusiastic people please.... Many thanks