Kotlin “object” is thread-safe by construction. As you can see in any decompile/dumping tool, declared object is just final class with static instance initialization + language syntax sugar to simplify instance access
if you read the Little redis book at some point this sentence comes. “You might not know it, but Redis is actually single-threaded, which is how every command is guaranteed to be atomic. While one command is executing, no other command will run.” Have a look in http://openmymind.net/2012/1/23/The-Little-Redis-Book/ for more information Regards