It's really legit though

I'm from NUS CS 2021. I have friends from NUS CS 2021 (who all got at least a 2nd upper), they were being offered mid 6k+ with 2 months bonus and stocks which sums to 100k a year at least

Are you join Shopee in 2021 as SWE? If so you are severely underpaid, I'd suggest you raise this your HR because the standard pay is really 100k

I've heard the top student from CS 2021 cohort (Lee Kuan Yew Medal) was being offered close to 10k base and few hundred units of RSU just to compete with the other offers he had gotten