Please show me how to become a blockchain developer?
Where can I start to learn about this matter? (some resources, person,..)
Your previous experiences will determine the starting point for you.
What programming languages do you know? "You must have a background about [C++, Python, Perl, Node.JS]" Read more here --->
https://www.tiobe.com/tiobe-index/I think you know that the blockchain is not a bitcoin or cryptos but extended applications --->
https://en.wikipedia.org/wiki/Blockchaingeneral information: Bitcoin is C++ protocol, and reading
Bitcoin whitepaper will help you to know altcoins.
Books ---->
https://github.com/aantonop/bitcoinbookIvan on Tech:
I think his videos will help you to understand the blockchain but not to be a developer
Thanks very much! Posts and information are very useful for new people like me.