I am after someone that can build something similar to:
Key points are that user can
1, choose from a template (like a clipart library)
2, upload already desigend card, PSD, PDF
3, design card using html5 canvas
4, save each of the individual elements and load them back in (ie to continue editing). Exporting to a JSON is sufficient.
c) import and resize imported images
Bonus would be to export this as a print ready PDF, (CMYK - PDF-X/1A) with cropmarks.
Preferably work using an existing eCommerce suite like opencart,
Orders to be downloaded in back end as a zip file from preview image link
Any questions, please ask.