How to organize Jira for suitable work in multiple projects?

[Kurochkin Alexander]

Hello, I'm looking for the most comprehensive way to organize my project. It includes several meaningful blocks in itself:

1. Mobile application for both IOS and android
2. Desktop application for Linux/Windows
3. Different web-applications as well as services that called as Back-tools here
4. Messenger Bots. I see only  telegram as a primary messenger.

It's not clear for me yet because I want to use kanban per a board and scrum for spontaneously sprints that are able to include any task in any variation from blocks above.

Questions:

1. So, all these blocks should be combined together or be split into a board per project? 
2. How to use kanban for every project but scrum for agile development across of these projects?
3. I need to be able add a specific tasks to a specific board and combine them into one scrum board if it will be required. What is the best way to do it?

I hope the description is enough to grasp an idea of organizing my project I'm looking for. Please, do not hesitate to ask me about any details because I could forgot to reveal all what have matter. Thank you for reply.

[jira guy]

First you can use component/s for each application. If you think it goes really big like 100,000 issues or more. Only then try creating different projects because administration would get messy. 

regarding your questions:

1. It's better to create board per team. 

2. You can create any no of boards. Make sure to properly filter them with respect to boards. So there won't be any duplicate work in different boards.

3. It all depends on how you setup your boards. Board can pull issues from a project/filter. Created issues will be automatically added based on that filter. There is nothing like combing.