Blockchain Engineer - Smart Contracts- English Required

Work at DaCodes! We are a firm of experts in high-impact software and digital transformation. For 10 years, we’ve built innovative technology solutions thanks to our team of 220+ talented #DaCoders, including developers, architects, UX/UI designers, PMs, QA testers, and more. Our team collaborates on projects with clients across LATAM and the United States, consistently delivering outstanding results. At DaCodes, you will have the opportunity to accelerate your professional growth, work on diverse projects across multiple industries, and contribute to the design, implementation, and optimization of modern cloud and emerging technology infrastructures. Our DaCoders have a significant impact on the success of both our business and our clients. You will be the expert shaping our projects while gaining access to disruptive startups and global brands. Interested? Requirements Key Responsibilities

• Design, develop, and deploy secure and efficient smart contracts.
• Participate in architectural discussions for blockchain systems and decentralized applications.
• Perform code audits, refactoring, and gas optimization for high-quality smart contract performance.
• Integrate smart contracts with backend services or Web3 components.
• Conduct unit, integration, and security testing using blockchain testing frameworks.
• Collaborate closely with backend, frontend, QA, and DevOps teams to deliver complete solutions.
• Stay informed about blockchain ecosystem advancements, EVM updates, token standards, L1/L2 trends, and best practices.

Desired Profile

• 2–5+ years of experience as a Smart Contracts Engineer, Blockchain Engineer, or similar role.
• Strong hands-on experience with Solidity and EVM-based blockchain development.
• Knowledge of DeFi protocols, crypto primitives, or tokenomics (nice to have).
• Familiarity with Hardhat, Foundry, Truffle, or comparable tools.
• Experience using Web3.js, Ethers.js, or other Web3 libraries.
• Understanding of smart contract vulnerabilities (reentrancy, frontrunning, integer overflow, etc.).
• Strong analytical and problem-solving skills with a security-first mindset.
• Experience working in agile development environments.
• Intermediate–advanced English proficiency.

Technologies & Tools

• Solidity, EVM, Hardhat, Foundry, Truffle
• Web3.js / Ethers.js
• Git, GitHub
• Nice to have: AWS/GCP, non-EVM ecosystems (Solana, Cosmos), CI/CD, cryptography fundamentals

Benefits Integración a marcas globales y startups disruptivas. Trabajo remoto/Home office. En caso de requerir modalidad híbrida o presencial, serás informado desde la primera sesión. ⏳ Horario ajustado a la célula de trabajo/proyecto asignado. Trabajo de lunes a viernes. Día off en tu cumpleaños. Seguro de gastos médicos mayores (aplica para México). ️ Seguro de vida (aplica para México). Equipos de trabajo multiculturales. Acceso a cursos y certificaciones. Meetups con invitados especiales del área de IT. Eventos virtuales de integración y grupos de interés. Clases de inglés. Oportunidades dentro de nuestras diferentes líneas de negocio. Orgullosamente certificados como Great Place to Work.