Blockchain Developer - Smart Contracts & Wallets

Job description

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 is a remote position for Costa Rica and Colombia

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.

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.

  • Bonus: Experience with tools like Hardhat, Truffle, Web3.js, Ethers.js.

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