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| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Optimism | Remote | $81k - $100k | |||
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Optimism
$81k - $100k estimated
This job is closed
What are the role responsibilities?
- Lead the development of our primary consumer facing product, the Optimism Gateway
- Collaborate with design and engineering teams to develop technical direction and vision for web and mobile features
- Architect and own the technical development of the frontend codebase
- Create smooth, stable, and elegant user experience with modern-day Javascript based UI frameworks like React
- Own features from inception and design all the way to implementation and launch
- Work with the protocol team to ensure the security and correct usage of fundamental protocol features (e.g., ERC20 and ERC721 bridge primitives)
What skills do you bring?
- 4+ years of experience in software engineering, including 3+ years of experience in modern web technologies
- Fluency in React with knowledge of current best practices and understanding of the trends and technical progression of web frameworks and design patterns
- Familiarity in front-end architecture, including performance, security and usability
- Familiarity but not prior work experience with the crypto space required
- Experience leading the development of a consumer facing product preferred, not required
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.