Build me a solution for document exchange

I am seeking an Application Developer with skills that Exemplifies all the skills Noted below, you must have PROOF of your work to be considered with excellent reviews. 1. All source code must be commented and explain what it does, NO Exceptions 2. The Following skills are required: a. Full Stack Web Technologies b. HTML5 c. CSS3 d. JavaScript e. Python Flask – f. PWA Flask g. MySQL h. Swift i. Nodejs j. DJango k. Application Testing l. Web Server Technologies m. blockchain 3. Project will follow a scheduled plan through 6-months period. All milestones will be set by us not the developer(s). 4. NDA, IP, and trademarks will need to be signed before accepting work and milestones