Fresh grads at Google get about 5k SGD (~ 3.7k USD) a month plus equity. That's lower than FAANG in the US.
With any kind of experience, salaries quickly ramp up. For example, I know an unremarkable Facebook E6 with 550k SGD (~ 408k USD) total yearly comp. You can also work in the tech department of finance companies, like Goldman Sachs or some funds.
Take home pay is about 80% of gross. There's no capital gains tax.