Looking for someone to write software requirement specification

We are looking for an experienced expert in the software development field with latest trends and technology knowledge.

I want to have a similar solution as is:
https://www.chatwoot.com
https://tiledesk.com

For that we are looking for a full and technical correct specification software requirement document.

Please, feel free to ask if anything is not clear snd I will try to answer as asap.

Good luck!