hi,
I have experience of managing more than 4000 aws nodes of different os like amzon linux-1, amazon linux-2, CentOS,ubuntu and windows with chef.
for managing this infrastructure, according to different use cases of different teams I have
developed/modified more than 30 cookbooks.
apart from that I have exposure with devops technologies like aws, jenkins, GitHub, python, terraform, kibana, docker etc.
if you want to discuss more, let me know.