Add pulsable watermark feature to webapp

We are building a credential sharing app and we need someone who can help us to build the following feature: 1) We need a dynamic watermark generator (the dynamic part is in date) see image "Screen Shot 2018-03-29 at [login to view URL]" It should look similar and the date should be render as the example. 2) We need to add the following feature to the watermark see video "[login to view URL]" or here [login to view URL] App prototype: ([login to view URL]) Have you done similar projects? please share examples!