If you want to get in touch, please e-mail me at
rodrigo AT tassinari DOT eti DOT br. I reply to every (human sent) e-mail I receive.
I’m also pretty active on Mastodon as @firstname.lastname@example.org, Twitter as @rodrigtassinari (not a typo, damn 15 characters limit!) and on Instagram as @rodrigotassinari, so you could try and reach me there. But e-mail is still the best option.
I’ve got profiles in a lot of other social networks and websites (as mentioned here), but I generally don’t pay attention to messages there.