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 ISO 9001 Certified | 400+ students | Learn more | by Metana | ||
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Job Overview:
Our ideal candidate should behighly motivated and passionate about the future of DeFi. They should be fully up to date on the latest technologies and standards in the DeFi space and have extensive experience writing code for a large-scale blockchain organization.
Roles and Responsibilities:
• Develop DeFi applications and smart contracts for Solidity (Ethereum Blockchain).
• Testing according to standards (ERC20, ERC179, ERC721).
• Build, review, and help to design high-quality, maintainable code.
• Work autonomously with a high degree of ownership.
• Development of smart contracts for Solidity (Ethereum Blockchain).
• Protocol design while ensuring new protocol features are always well tested and documented.
• Research and develop new techniques, technologies, and ideas for improvements to the platform and products.
• Support, mentor, and guide the team when needed.
Requirements:
• Deep understanding of DeFi protocols.
• At least 1 year of experience with Solidity & smart contracts.
• At 3+ years of experience in blockchain industry.
• Hands-on experience with JavaScript/ Python.
• Experience integrating with Ethereum.
• Experience with truffle, OpenZeppelin.
• Understanding the basic security pitfalls when writing smart contracts for solidity / EVM will be a plus.
• The ability to write maintainable code, cover functionality with tests.
• Strong skills in core Computer Science theory/use (data structures, algorithms, etc.)
• Creative problem-solving skills with an analytical mindset.
• Self-starter with the ability to produce results with minimal supervision.
What is ERC20 example?
ERC20 is a standard for fungible tokens on the Ethereum blockchain
Here is an example of an ERC20 token
Let's say we create a new ERC20 token called ABC Token with a total supply of 1,000,000 tokens
Each token will be divisible up to 18 decimal places
To implement the ERC20 standard, we will need to define several functions, including:
- balanceOf(address): Returns the token balance of a specific address.
- transfer(address to, uint256 value): Transfers tokens from the caller's address to the specified address.
- approve(address spender, uint256 value): Approves a specific address to spend a certain amount of tokens on behalf of the caller.
- allowance(address owner, address spender): Returns the amount of tokens approved by the owner that the spender can transfer.
- User1 owns 500,000 ABC Tokens.
- User2 wants to buy 100 ABC Tokens from User1.
- User1 approves User2 to spend up to 100 ABC Tokens on her behalf.
- User2 calls the transferFrom() function with User1's address, his own address, and the value of 100 tokens.
- The transferFrom() function deducts 100 tokens from User1's balance and adds them to User2's balance.