i need well developer for this

looking for expert in bootstrap firebase and angular to prepare a documentation for a chat app: High level architecture diagram (Include relevant technologies) • UML class diagram (Server) • Data storage structure • Pseudo code test cases . I never did any documentation using those things. Those are very important need. so you have do clear documentation. some considerations:############security, what level? not crucial? (we could use firebase) crucial? we need backend (spring boot) #####what actions in the chat? only text messaging? uploading of files? dynamic charts? #########should it be directly integrated in the win app or a spinoff? ##### ####how to deal with size of database?