| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
Austin Werner Ltd | Minneapolis, MN, United States | $27k - $57k | |||
Infinite Reality | San Francisco, CA, United States | $45k - $75k | |||
Paraform | United States | $54k - $112k | |||
Qredo | Amsterdam, Netherlands | $85k - $150k | |||
| Learn job-ready web3 skills on your schedule with 1-on-1 support & get a job, or your money back. | | by Metana Bootcamp Info | |||
Paraform | United States | $59k - $90k | |||
Vivo (Telefônica Brasil) | Sao Paulo, Brazil | $54k - $60k | |||
Syntropy | Berlin, Germany | $54k - $75k | |||
Infinite Reality | San Francisco, CA, United States | $45k - $75k | |||
Digital Marketing Company | Los Angeles, CA, United States | $45k - $75k | |||
Roote | San Francisco, CA, United States |
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Upside.gg | United States | $36k - $61k | |||
Qredo | Lisbon, Portugal |
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Mythical Games | Los Angeles, CA, United States | $32k - $92k | |||
Parallel Finance | San Francisco, CA, United States | $60k - $70k | |||
Paraspace | San Francisco, CA, United States | $60k - $70k |
Senior Blockchain Engineer – Smart Contract / Solidity
This privately-owned business is changing the world of banking by introducing a technology-driven bank relying on smart contracts and blockchain instead of brick and mortar and bankers.
this well-funded startup is going to change the world of banking through investment in technology. Be one of the first senior developers to contribute!
Their headquarters are in the US, but you are not required to relocate to there due to their decentralized team culture. Team working hours fit well within any of the US time zones.
The Senior Blockchain Engineer should have:
- A degree in computer science or relevant field or comparable experience
- Experience in blockchain, Ethereum, and Solidity, ERC20, OpenZeppelin libraries, working with mainnet
- Extensive experience in working with distributed file systems or databases and/or designing distributed systems
- Ability to solve complex problems and express solutions in layman’s terms
- Excellent oral and communication skills
- Ability to architect end to end solutions
- Firm grasp of object-oriented programming
- Coding skills in at least one of the following languages: C++, Java, TypeScript
- Ability to write design documentation and review code for other developers
- Experience in tools like Slither, Echidna, Manticore would be a plus.
- Ensure excellent architecture and design for all features
- Design, code and deploy smart contracts on mainnet
- Architect new features
- Ensure the highest level of security measures in the system
- Review code was written by other developers
- Write design documents and review design documents
- Ensure full automated testing of smart contracts
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.