As a beginner, a person can take up the roles such as Blockchain developer, Blockchain engineer, Bitcoin Miner, or Blockchain smart contract developer.
A Blockchain developer, sometime called Blockchain engineer, is someone who designs, implements and supports a Blockchain network.
Being well versed in programming languages such as python and C Sharp, as these are the languages on which most Blockchains are created, is important.
For creating distributed applications and smart contracts on Ethereum, you’ll need to learn the programming language Solidity and need to learn the concepts of Object Oriented Programming.
As Blockchain was created on the basis of concepts from Flat and Relational Databases, you need to understand the working of data structures like, linked list, stack, queue etc.
A back-linked list of blocks that hold transactions, Blockchain, and as each block within the Blockchain is referenced to the block before it, in the “previous hash” field in its header, understanding the queue structure is important.
Be well versed in Web applications as these opens up a wide array of opportunities to create web and mobile applications based on Blockchain Technology.
The responsibility to validate the unverified transactions and add them to a block lies with the Bitcoin miners.
The responsibility to build a computerized contract (An online document that contains the terms and conditions of a mutually agreed contract) between the peers lies with the Blockchain smart contract developer.