Go-Jek and Grab are both very strong in SE-Asia in ride sharing. Both their backends are (re)written in Go. Each had a presentation on it during Gopher Con 2018

Go-Jek and Grab are both very strong in SE-Asia in ride sharing. Both their backends are (re)written in Go. Each had a presentation on it during Gopher Con 2018 in Singapore. They are also big sponsors of that event: https://2018.gophercon.sg/ https://2018.gophercon.sg/ [Edit: one of them had some impressive stats on reducing servers while increasing demand]