Collaborative Design Platforms- “Mural” Alternatives?

Hello all- I'm part of a software development team and we're currently using Mural as our collaborative product development platform. Though we like its intuitive and powerful interface, we're looking for a platform that is more friendly to code planning, specifically code snippets. For example:

https://imgur.com/cUwzHhV

This is a screenshot of the interface and a sample sprint task. We like the diagram aspect and find that helpful, but there isn't a great way to add code to Mural. If we could add in some sample code, maybe even something that allows for different levels of detail, it could really help with explaining our more detailed tasks to developers that aren't as knowledgeable in that area.

For example:

def read_folder_stdout(path): ... 

and then maybe you zoom in?

def read_folder_stdout(path): list = os.listdir(path) for file in list: ... 

I'm realizing that I definitely should've gone with a more detailed task to back up the necessity of this "levels of detail" feature, but I think you probably get the point. That isn't a necessity, just something we've thought my be helpful. Basically, I'm looking for Mural with code blocks.

Thank you!!