| Job Position | Company | Posted | Location | Salary | Tags |
|---|---|---|---|---|---|
SMASH | United States | $98k - $105k | |||
D3 | San Francisco, CA, United States | $122k - $150k | |||
Weekday AI | Delhi, India | $36k - $54k | |||
molecule.xyz | Remote | $76k - $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 | |||
Molecule | New York, NY, United States | $84k - $120k | |||
molecule.xyz | Berlin, Germany | $77k - $105k | |||
Molecule | New York, NY, United States | $72k - $90k | |||
Caiz | Remote | $74k - $84k | |||
Almanak | Remote | $72k - $148k | |||
Appnovation | Remote | $140k - $150k | |||
VanEck | New York, NY, United States | $87k - $93k | |||
EoT Labs GmbH | Remote | $87k - $87k | |||
Improbable | London, United Kingdom | $87k - $93k | |||
Improbable | London, United Kingdom | $81k - $100k | |||
VanEck | New York, NY, United States | $87k - $93k |
SMASH, Who we are?
We are agents for tech professionals in Costa Rica and Colombia that help them build careers in the United States.
We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step.
We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast.
We purposefully move away from the “contractor” or “outsourcing” type of relationship. Our clients don’t want contractors or “just a service.” Neither does our talent.
Our Benefits
- Work from everywhere
- Private Medical Insurance
- English Academy for Employees and Relative
This position is Remote to work with a US Company; you will require to have Citizenship or a work permit from Costa Rica or Colombia to apply for this role.
Job Profile Summary
We’re looking for a Blockchain Developer with experience in Ethereum smart contracts or EVM-compatible wallet development to join our team. You’ll be working alongside our web app team to expand and optimize our crypto-based solutions.
Responsibilities:
- Design, develop, and deploy smart contracts on Ethereum or EVM-compatible blockchains.
- Collaborate with the web application team to integrate blockchain functionality seamlessly.
- Build and maintain wallet features including transaction management, security layers, and user interactions.
- Conduct audits and testing of smart contracts to ensure performance, security, and reliability.
- Stay up to date with evolving blockchain technologies and best practices.
- Proven experience with Ethereum, Solidity, and smart contract development.
- Strong knowledge of EVM-compatible chains and wallet frameworks.
- Experience integrating blockchain with web applications.
- Familiarity with crypto standards (ERC-20, ERC-721, ERC-1155, etc.).
- Understanding of blockchain security principles and best practices.
- Bonus: Experience with tools like Hardhat, Truffle, Web3.js, Ethers.js.
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.