Skills Needed to Become a Blockchain Developer 

A strong foundation in at least one object-oriented programming Language is key. Popular choices are: C++ JavaScript Python Solidity

Programming Languages: 

Grasping the fundamentals is vital , Learn Distributed System Consensus Mechanism Types of Blockchain

Blockchain Architecture:  

To Efficiently organize and storing data on a blockchain, Learn Linked List Merkle Tree Hash Table

Data Structures:  

For The pillar of blockchain security, learn Hashing Function Digital Signature Public/Private Key Cryptography

Cryptography:  

Self-executing programs on the blockchain.  Skill in a smart contract language (especially Solidity for Ethereum) is vital.

Smart Contracts: 

Databases and Networking Web Development Basic Cryptography and Security Principles 

Additional Valuable Skills