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> hh.ru - Russian Linkedin

I'm genuinely impressed. Do you know what is their technology stack?



F/E:

Handwritten ES5 to big extend. They are very choosy on use of browser features and amount of fallbacks they bundle (no point of using polyfills if they work at 1/10th of native speed.) They carved out some of react core code for event handling, and use 3rd party remote JS debugging lib. Everything else was developed in house over the course of 20 years. Some of their front-end code featuring seemingly new approaches to handling JS, can easily be written over 10 years ago as they were one of web 2.0 pioneers.

On the backend side, they are a Java shop with immediate front-end interaction being partly handled by purpose built API servers on C++.




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