@solus yes, Outline uses Shadowsocks as its protocol. For that reason you can use any of the Shadowsocks clients to talk to an Outline server. You can also use the Outline client to connect to most shadowsocks servers, but the server muse support UDP and the client doesn’t support plugins or non-AEAD ciphers (they are unsafe!!).
I highly recommend using the Outline Manager to create and manage your server, which you can find at https://getoutline.org.