Register on their website, submit documents (resume), write an essay to them. no need for cover letter. All that's left is to wait for them to call. No coding test, nothing complicated.
I applied online. I interviewed at Sony (Singapore) in Nov 2023
Interview
~1 hour
mainly tech-related
you need to understand some fundamental about NNs. Mostly like test from school, wasn't sure I want to do AI so I didn't really prepare. But it's very regular questions.