It is interesting to note that the author works at VPBank, which is one of the larger Vietnamese banks. Saving $150k per year on an AWS bill, is really nothing to them. The fact that they even outsource their compute to AWS is kind of surprising when they could just fill up their existing data centers (like VNTT https://vntt.com.vn/ ) with equipment, and save a whole lot more money.
And it's also interesting that they can outsource their compute to AWS because AWS's nearest data centers are in Hong Kong & Singapore. I didn't realize a bank would allow that.
My guess is that nobody in corporate approved this guys posting and if word got back, it would disappear quickly.
Reminds me to forward this to my buddies who run Timo, which VPBank used to own, but then dropped [1]. Timo was the first forward thinking bank in Vietnam with a great tech platform, likely because it was started and run by foreigners... ¯\_(ツ)_/¯.
[0] https://www.reddit.com/r/VietNam/comments/zvo553/sharks_ate_...
[1] https://fintechnews.sg/42738/vietnam/vietnams-challenger-tim...