What is the tech stack used by etherscan.io?

There has always been a question about what is the technology stack of etherscan.io
How to parse, retrieve and store the data on so many chains?
I am a rookie, how to learn this technology? Is there any relevant direction thank you!

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Hi, welcome to the community! :wave:

Sorry, I am not sure for this, maybe you can ask them directly at the Etherscan | Reddit or somewhere else.