Javascript - Flow Chart & Editor Development

We have started a project and covered up its base, but we are stuck in middle now to make it finish. We need a Javascript expert to take this build from us and finish it as per our need. We shall only pay if job is 101% done, no partial or small payments. You will talk to us, understand the project and then do the commitment. If you are stuck for 3 days or you do not provide us update after every 3 days, we shall cancel the project right away. We have to replicate this https://bpmn.io/ using their code or even from scratch. We can use their functions, but we cannot use full code as this is what we already using. No green, only experienced full time Javascript people required. When you bid "iluvjavascript" must be 3rd word in your message.