Blockchain Developer - Smart Contracts & Wallets

Summary

Join SMASH, a tech talent agency connecting professionals in Costa Rica and Colombia with US companies, as a Blockchain Developer. You will design, develop, and deploy smart contracts on Ethereum or EVM-compatible blockchains, collaborating with the web application team. Responsibilities include building and maintaining wallet features, conducting audits and testing, and staying current with blockchain technologies. This remote position requires experience with Ethereum, Solidity, and smart contract development, along with knowledge of EVM-compatible chains and wallet frameworks. The role offers private medical insurance and access to an English academy for employees and relatives. This is a remote position for candidates with Costa Rican or Colombian citizenship or work permits.

Requirements

• 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

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

Preferred Qualifications

Experience with tools like Hardhat, Truffle, Web3.js, Ethers.js

Benefits

• Work from everywhere
• Private Medical Insurance
• English Academy for Employees and Relative