⬅️  To Main Ethers.js jobs

Create flexible and precise queries that fit your needs exactly. Example: React.js, -USA  × Laravel, Vue.js, -Contract  × will get you jobs that are (React.js and not in USA) or (Laravel and Vue.js and not Contract/Freelance).

You can mix and match any tags, negations and groups in any order. And don't worry about typos – the search is fuzzy.

Dismiss

wildcat Remote
About Wildcat Wildcat is an Ethereum protocol revolutionizing on-chain credit with an innovative, undercollateralized borrowing solution. Our mission is to lead this market by enabling borrowers to create, customize, and manage credit facilities in a more transparent, efficient, and secure environment. Borrowers can tailor their credit demand to suit their needs. Designed for sophisticated participants in both traditional finance (TradFi) and DeFi, Wildcat is committed to transforming on-chain credit and unlocking more efficient, customized solutions in decentralized finance. Working for Wildcat As a Full-Stack Developer , you will be driving the technical evolution of Wildcat’s undercollateralized lending platform. You’ll work across the front-end and back-end while integrating Ethereum smart contracts to

About Wildcat

Wildcat is an Ethereum protocol revolutionizing on-chain credit with an innovative, undercollateralized borrowing solution. Our mission is to lead this market by enabling borrowers to create, customize, and manage credit facilities in a more transparent, efficient, and secure environment. Borrowers can tailor their credit demand to suit their needs. Designed for sophisticated participants in both traditional finance (TradFi) and DeFi, Wildcat is committed to transforming on-chain credit and unlocking more efficient, customized solutions in decentralized finance.

Working for Wildcat

As a Full-Stack Developer, you will be driving the technical evolution of Wildcat’s undercollateralized lending platform. You’ll work across the front-end and back-end while integrating Ethereum smart contracts to deliver an intuitive, secure, and high-performance user experience. Leveraging your experience in agile development and DeFi best practices, you will play a central role in shaping the platform’s architecture, features, and scalability. You’ll collaborate closely with the founding team, product manager, and other developers to ensure Wildcat remains at the forefront of on-chain undercollateralized credit innovation.

Responsibilities

Front-End Development

  • Build user interfaces using React/TypeScript, creating responsive and intuitive designs.
  • Maintain code quality through modular architecture, consistent coding standards, and performance optimization.
  • Collaborate with designers and product managers to refine user flows and deliver new features seamlessly.

Back-End Development

  • Develop Node.js services to power Wildcat’s undercollateralized lending protocol.
  • Create and optimize APIs (REST/GraphQL) and integrate databases (e.g., PostgreSQL, PouchDB) for efficient data handling.
  • Contribute to infrastructure decisions, including evaluating serverless vs. containerized setups and refining CI/CD pipelines.

Testing Setup

  • Establish robust testing strategies (unit, integration, end-to-end) for front-end and back-end components.
  • Automate testing workflows using tools like Jest, React/Vue Testing Library, and ensure consistent coverage for critical DeFi logic.
  • Champion security best practices, helping to identify vulnerabilities early in the development lifecycle.

Integration with Ethereum

  • Leverage ethers.js or wagmi to integrate Solidity contracts into the web application, handling wallet connections and transaction flows.
  • Use Hardhat or Foundry for local development, contract deployment, and thorough on-chain testing.
  • Ensure stability and security in all on-chain interactions, collaborating closely with the protocol team to maintain reliable DeFi operations.

Requirements

  • Proven Full-Stack Experience: 5+ years building production-grade applications across front-end (React/Vue) and back-end (Node.js, REST/GraphQL, PostgreSQL).
  • Ethereum & Web3 Knowledge: Familiarity with Solidity contracts, EVM fundamentals, and libraries like ethers.js. Experience setting up local test environments (Hardhat/Foundry) is a plus.
  • Security & DeFi Mindset: Ability to design and implement secure coding practices for high-stakes financial systems, including an understanding of undercollateralized lending risks.
  • Testing & Deployment Proficiency: Comfortable with automated test frameworks (Jest, Hardhat/Foundry) and modern CI/CD pipelines (GitHub Actions, Netlify/Vercel, Docker).
  • Agile & Self-Directed: Demonstrated ability to handle multiple priorities, propose solutions, and deliver results within an iterative, remote-first environment.
  • Collaboration & Communication: Strong written and verbal communication in a distributed team (EU time zones). Proficiency in working cross-functionally with designers, product managers, and marketers.
  • Technical Leadership & Mentorship: Experience making architectural decisions, reviewing code, and guiding less-experienced developers. Stay current on Ethereum and decentralized lending trends, bringing valuable insights to the team.

What We Offer

  • Impact & Ownership: Influence the direction of an innovative DeFi protocol and see your contributions directly shape the Wildcat ecosystem.
  • Cutting-Edge Work: Collaborate with seasoned experts in DeFi and TradFi at the intersection of blockchain, finance, and technology.
  • Remote Flexibility: Join a globally distributed team with flexible work arrangements, primarily aligned with EU hours.
  • Competitive Compensation: Receive a competitive salary (in crypto or fiat) and potential equity/token allocation based on company growth.
  • Growth & Development: Access to ongoing learning opportunities and a front-row seat to the latest advancements in decentralized finance.

Apply Now:

Permalink

Aztec Remote
About Aztec At Aztec, our goal is to add privacy to Ethereum. In the current public blockchain paradigm, users and entities unknowingly broadcast data in the public, compromising privacy and security to get trustlessness. Not only are unencrypted blockchains inherently privacy-exposing, they require significant redundancy to compute and verify the legitimacy of transactions. Implementing scalable encryption in a public blockchain paradigm requires cutting-edge math and engineering. Thankfully, our team of scientists and engineers invented Plonk, the industry-standard zkSNARK, and Noir, the universal language of zero knowledge. Now, we’re building a first of its kind Layer 2 with private smart contracts. This requires new cryptographic primitives, a zero-knowledge DSL for writing contracts, a privacy-friendly execution environment, a carefully designed set of circuits that prove the validity of the chain to L1, a decentralized block-building and proving mechanism, and a to

About Aztec At Aztec, our goal is to add privacy to Ethereum. In the current public blockchain paradigm, users and entities unknowingly broadcast data in the public, compromising privacy and security to get trustlessness. Not only are unencrypted blockchains inherently privacy-exposing, they require significant redundancy to compute and verify the legitimacy of transactions. Implementing scalable encryption in a public blockchain paradigm requires cutting-edge math and engineering. Thankfully, our team of scientists and engineers invented Plonk, the industry-standard zkSNARK, and Noir, the universal language of zero knowledge. Now, we’re building a first of its kind Layer 2 with private smart contracts. This requires new cryptographic primitives, a zero-knowledge DSL for writing contracts, a privacy-friendly execution environment, a carefully designed set of circuits that prove the validity of the chain to L1, a decentralized block-building and proving mechanism, and a top-tier user and developer experience. And it’s now time to bring it to market. We’ve raised $125 million from industry-leading investors including a16z crypto, Paradigm, Variant, Consensys, and a_capital, and we’re growing quickly.Role Overview As a Front-End Software Engineer at Aztec Labs, you’ll be at the forefront of designing and developing intuitive, high-performance user interfaces for developers and users interacting with our zkApps, wallets, and protocol tools. You will collaborate with design, cryptography, and protocol teams to ensure seamless and secure user experiences in a highly technical, fast-paced environment. This is a unique opportunity to help define the UX of privacy in Web3 and shape how users interact with next-gen decentralized systems. Key Responsibilities

Design, implement, and maintain front-end applications for zk-powered tools and dApps. Initial projects in the first months will be designing and developing the frontends for our showcase payment dApp and sequencer staking bootstrap projects, critical for our mainnet launch this year. Work closely with product managers to align UI/UX with product requirements. Work closely with engineers to integrate aztec.js into the apps and provide critical feedback. Create and translate design mockups and wireframes into pixel-perfect, responsive interfaces. Write modular, testable, and maintainable code using modern JavaScript frameworks. Contribute to UI/UX discussions and drive decisions around user experience best practices. Ensure performance, security, and scalability of all front-end applications.

Required Qualifications

3+ years of experience building production-grade front-end applications. Strong proficiency in TypeScript, JavaScript, React or Svelte, and HTML/CSS. A deep understanding of frontend performance optimization, accessibility, and responsive design. A focused, and minimalist approach to engineering and design, avoiding bloat, and keeping the code easy for everyone to maintain. Strong communication and collaboration skills. You will be expected to develop a deep understanding of the requirements, and can then take the initiative to meet them with minimal management. Passion for blockchain technology and a strong desire to build user-first Web3 applications.

Nice to Have

Experience working with Web3 libraries (e.g., ethers.js, viem, wagmi). Familiarity with zero-knowledge proofs, privacy-preserving technologies, or blockchain protocols. Previous contributions to crypto wallets, block explorers, or dApp front-ends. Understanding of UX design principles and familiarity with Figma or design systems. Experience with end-to-end testing frameworks (e.g., Cypress, Playwright). Exposure to Layer 2 solutions and Ethereum development tools.

What we offer:

A highly competitive compensation package (including equity) Flexible and remote work environment based out of London 25 days holiday + bank holidays annually An opportunity to work at the cutting edge of blockchain with a world class cryptography and engineering team Aztec Labs is an equal opportunity employer and we value creativity, diversity, and intellectual curiosity. If you're passionate about leveraging your creative talents to make a real-world impact, and if you want to be part of a team that's shaping the future of digital privacy, then we would love to hear from you.

Apply Now:

Permalink

Altoros Remote
Protofire is looking for an enthusiastic Middle/Senior Fullstack Developer who is deeply passionate about the Web3 space. Join our dynamic team engaged in projects with renowned companies such as (ex. Gnosis) Safe, Uniswap, Compound, Moonbeam, Cronos, Harmony, Oasis, Wemade, ImmutableX, Optimism, zkSync, zkScroll, Lido, ETH Foundation and over 20 others. How you will make an impact: Develop both back-end and front-end web services and products across various blockchains and ecosystems, primarily EVM-compatible, catering to millions of web3 users. Gain a comprehensive understanding of the business aspects of projects and enhance them with innovative features and functionalities. Engage in effective communication with network/platform owners and the ecosystem community, actively contributing to the broader adoption of web3. Contribute significantly to the open-source community.

Protofire is looking for an enthusiastic Middle/Senior Fullstack Developer who is deeply passionate about the Web3 space. Join our dynamic team engaged in projects with renowned companies such as (ex. Gnosis) Safe, Uniswap, Compound, Moonbeam, Cronos, Harmony, Oasis, Wemade, ImmutableX, Optimism, zkSync, zkScroll, Lido, ETH Foundation and over 20 others.

How you will make an impact:

  • Develop both back-end and front-end web services and products across various blockchains and ecosystems, primarily EVM-compatible, catering to millions of web3 users.
  • Gain a comprehensive understanding of the business aspects of projects and enhance them with innovative features and functionalities.
  • Engage in effective communication with network/platform owners and the ecosystem community, actively contributing to the broader adoption of web3.
  • Contribute significantly to the open-source community.

What you need to succeed:

  • 5+ years of experience in software engineering.
  • 3+ years of commercial development experience with JS/Typescript, and any (the more the better) of the following: Node.JS, Go, Rust, Python.
  • Proficiency with Postgress, MongoDB and/or nonSQL.
  • Knowledge about how a blockchain works, preferably Ethereum is a must.
  • Experience with Solidity.
  • Experience with some of the following libraries and utils: hardhat, web3.js, ethers.js, web3.py, storybook, etc.
  • Experience in AWS.
  • A desire to keep up with blockchain technology trends, readiness to research new, and a real interest in decentralization.

Apply Now:

Permalink

Avomind Remote
Our client is an AI-Web3 company dedicated to simplifying DeFi adoption by bridging the gap between complex blockchain interactions and user-friendly experiences. Their mission is to make decentralized finance more accessible by developing intuitive and seamless solutions for mass adoption. They work at the cutting edge of AI and blockchain to build the future of digital economies. They are an AI-Web3 team simplifying DeFi adoption through seamless on-chain interactions. The three co-founders are all PhDs in a top-ranking university, with rich experience in both blockchain and AI. Our client has partnerships with leading investors, including IDG capital, ABCDE, and Amber group, backed by both the company’s tech and co-founders’ close personal relationship with them. They sit at the intersection between AI and Web3. Our client looks for candidates who share a similar outlook and passion to join us. The Responsibilities

Our client is an AI-Web3 company dedicated to simplifying DeFi adoption by bridging the gap between complex blockchain interactions and user-friendly experiences. Their mission is to make decentralized finance more accessible by developing intuitive and seamless solutions for mass adoption. They work at the cutting edge of AI and blockchain to build the future of digital economies. They are an AI-Web3 team simplifying DeFi adoption through seamless on-chain interactions.

The three co-founders are all PhDs in a top-ranking university, with rich experience in both blockchain and AI. Our client has partnerships with leading investors, including IDG capital, ABCDE, and Amber group, backed by both the company’s tech and co-founders’ close personal relationship with them. They sit at the intersection between AI and Web3. Our client looks for candidates who share a similar outlook and passion to join us.

The Responsibilities

  • Develop Web3 DApps using TypeScript and integrate with smart contracts.
  • Work with Solana and EVM for blockchain development and deployment.
  • Debug and optimize smart contracts and frontend interactions. • Maintain technical documentation.
  • Proficiency in TypeScript and experience with Solana/Web3.js and Ethers.js.
  • Smart contract development experience in Solidity or Rust.
  • Familiarity with Solana or EVM ecosystems.
  • Strong problem-solving and learning ability.
  • Open-source contributions of prior Web3 project experience is a plus.

The Preferred Qualifications

  • Rust and Solana Anchor experience.
  • Knowledge of AI or AI Agents.
  • Participation in hackathons, blockchain projects, or DAOs.

Apply Now:

Permalink

YoutHNesT Remote
¿Te apasionan las criptomonedas y el blockchain, y tienes lo necesario para destacar como Developer? YoutHNesT es la primera criptomoneda social que combina el poder de las memecoins con un propósito transformador: ayudar a los jóvenes a conseguir su primera vivienda. Con un concepto innovador y un enorme potencial de crecimiento, este proyecto promete no solo cambiar vidas, sino también convertirse en un referente en el mundo cripto. ¿Estás list@ para unirte a esta revolución financiera y social? Buscamos talento apasionado para cubrir el puesto de Developer en YoutHNesT Si te interesa ser parte de un proyecto innovador con impacto social, envíanos tu candidatura. ¡Juntos, estamos cambiando el futuro del acceso a la vivienda para los jóvenes! Tareas Tareas del Developer YoutHNesT: Desarrollo y Mantenimiento de la Web

¿Te apasionan las criptomonedas y el blockchain, y tienes lo necesario para destacar como Developer?

  • YoutHNesT es la primera criptomoneda social que combina el poder de las memecoins con un propósito transformador: ayudar a los jóvenes a conseguir su primera vivienda. Con un concepto innovador y un enorme potencial de crecimiento, este proyecto promete no solo cambiar vidas, sino también convertirse en un referente en el mundo cripto. ¿Estás list@ para unirte a esta revolución financiera y social?
  • Buscamos talento apasionado para cubrir el puesto de Developer en YoutHNesT
  • Si te interesa ser parte de un proyecto innovador con impacto social, envíanos tu candidatura. ¡Juntos, estamos cambiando el futuro del acceso a la vivienda para los jóvenes!

Tareas

Tareas del Developer YoutHNesT:

  • Desarrollo y Mantenimiento de la Web
  • Integración Web3 & Plataforma
  • Desarrollo Blockchain y Smart Contracts
  • Backend y Base de Datos
  • Seguridad y Optimización
  • Soporte y Actualizaciones

Requisitos

Buscamos un perfil con visión y ambición para liderar, desde su ámbito, el crecimiento de YoutHNesT, la primera criptomoneda de su clase con un fuerte enfoque social. Este es un proyecto disruptivo en plena fase de expansión, donde el compromiso y la confianza serán clave. Ofrecemos una oportunidad única: trabajar a éxito a corto/medio plazo, con la garantía de que el riesgo será recompensado con una compensación altamente atractiva y proporcional al éxito alcanzado. ¿Te animas a asumir este reto y a cosechar los frutos de un proyecto con gran potencial?

Requisitos y habilidades necsarias:

  • Experiencia en desarrollo blockchain: 2+ años trabajando con Solidity y contratos inteligentes (ERC-20, vesting, oráculos).
  • Experiencia en Web3: Dominio de Web3.js, Ethers.js y conexión de DApps con la blockchain.
  • Desarrollo Full-Stack: Experiencia con React, Next.js o Vue.js en el frontend, y Node.js, Python o PHP en el backend.
  • Seguridad Blockchain & Web: Conocimiento de auditoría de smart contracts (Reentrancy, Overflows, Flash Loans) y ciberseguridad web (DDoS, CSRF, XSS).
  • Experiencia en APIs y servicios Web3: Integración con MetaMask, WalletConnect, y uso de APIs como Etherscan, Chainlink, The Graph.
  • Experiencia con Git & metodologías ágiles: Trabajo con GitHub/GitLab y conocimiento de Scrum/Kanban.
  • Idiomas necesarios: Nivel fluido de inglés y español

Beneficios

Beneficios de trabajar en YoutHNesT

  • Oportunidad de crecimiento en una startup innovadora con un enfoque disruptivo en el sector blockchain y criptomonedas.

  • Participación en un proyecto con impacto social, ayudando a los jóvenes a acceder a su primera vivienda.

  • Trabajo remoto con flexibilidad horaria, lo que permite equilibrar vida personal y profesional.

  • Alta Remuneración, con posibilidad de participar en el éxito del proyecto a través de equity o tokens.

  • Ambiente dinámico y colaborativo, con un equipo comprometido en una misión de largo alcance.

  • Desarrollo profesional continuo, con oportunidades de formación y networking en el ecosistema cripto.

  • Si estás list@ para formar parte de un equipo que revolucionará el mundo de las criptomonedas y generar un cambio social real, ayudando a las nuevas generaciones a cumplir el sueño de su primera vivienda, ¡queremos conocerte! En YoutHNesT, valoramos el talento, la innovación y la pasión por dejar huella. Si compartes nuestra visión y cumples con los requisitos, envíanos tu CV y súmate a esta emocionante aventura. ¡Tu impacto comienza aquí!

Apply Now:

Permalink