Cryptography
In the blockchain realm, cryptography is applied in the form of protocols that prevent unauthorized access to data. For example, public-key encryption can provide the basis for financial transactions using cryptocurrencies.
Smart contracts
Smart contracts provide transactions of goods or services without the need for intermediaries. They are only executed if the parties adhere to the terms of the contract. The effectiveness of smart contracts is primarily due to the decentralized nature of blockchain.
Smart contracts have applications in construction, law, and other industries.
Data structures
A blockchain network consists of data structures, and in the most general sense, a block is also a data structure. It clusters transactions for a public registry, which is a chain of blocks.
Data structures are important to the blockchain developer because they help understand the basic functionality of the block.
Blockchain architecture
Architecture is the fundamental concept of blockchain. A developer must be fluent in three types of it:
Private blockchain architecture is suitable for use cases with a limited number of participants and is a popular choice for businesses.
The consortium architecture is not fully decentralized. Members of a multi-organization group have full power here.
A public blockchain architecture is highly decentralized, allowing participation in the network through transactions or mining. The best known example of this architecture is Bitcoin.
Web development
In most cases, a blockchain programmer will develop web applications. He will also need to learn web design and master other tools to create quality dApps.
Customers require blockchain developers to create applications that can be easily used even by people with minimal knowledge of blockchain.
Network Protocols.
Another important component of blockchain technology. Protocols define the way data is structured and establish safeguards to prevent attackers from causing damage.
Blockchain protocols allow network nodes to exchange information securely over the Internet. It is important to understand that there are hundreds of protocols, so studying them will require a tremendous amount of time.