About the Company:  Shardeum is building a layer 1, EVM-based, linearly scalable, smart contract platform that provides low gas fees forever while maintaining true decentralization and solid security through dynamic state sharding. Shardeum aims to be a chain capable of onboarding over a billion people to the crypto revolution, while also democratizing accessibility to decentralization. Shardeum’s mission is supported by prominent Venture Capitalists in the blockchain space, and we are on track to become one of the most widely used and well known smart contract platforms in blockchain history.We encourage you to browse our website, Whitepaper, Discord and YouTube channel to learn more about the project. You can even try downloading our validator software and joining our Testnet. We encourage people of all backgrounds to apply. Your talent and potential is what matters most to us. Shardeum is committed to creating an inclusive culture.About The Role: The Engineering team at Shardeum is responsible for delivering the Shardeum Mainnet and developing critical components such as the smart contract platform, consensus layer, and protocol layer. As part of this team, the SDET (Software Development Engineer in Test) will play a key role in ensuring the quality, reliability, and performance of Shardeum’s decentralized platform through robust test automation, debugging, and validation processes. This role is ideal for engineers who have a passion for test automation, load testing, and identifying root causes of bugs to enhance blockchain performance and scalability. If you’re excited about solving unique challenges in the Web3 space and driving innovation in blockchain testing methodologies, we want to hear from you! What You'll Be Doing:

Analyze bug tickets, debug code, and identify the root cause of errors across the Shardeum platform. Design, develop, and maintain test automation frameworks and reusable test scripts to validate core functionality, including nodes, consensus mechanisms, smart contracts, and blockchain transactions. Utilize cutting edge AI tools to make testing faster and more efficient (Cursor, Github Copilot, Windsurf, Cline, etc..) Develop and execute load testing scripts to validate system performance under high transaction loads and varying node configurations. Create comprehensive test coverage through functional, integration, system, and regression testing while optimizing test suites and identifying performance bottlenecks. Develop end-to-end (E2E) test cases for complex workflows, ensuring reliability of consensus protocols and smart contract execution. Collaborate closely with development teams to integrate testing into CI/CD pipelines, improve testing workflows, and troubleshoot dependency failures. Build and maintain internal tools to improve developer experience, productivity, and test efficiency. Troubleshoot highly complex automated testing failures using industry-standard frameworks and custom tools, working with developers and backend partners to triage issues and improve E2E reliability. Develop monitoring tools and utilities to track blockchain-specific performance metrics and test results. Participate actively in agile ceremonies, including sprint planning, stand-ups, and retrospectives, to drive testing best practices. Continuously research and adopt innovative tools, frameworks, and testing methodologies to improve quality, scalability, and efficiency of testing processes.

What We're Looking For:

5+ years of experience in Software Engineering or SDET roles with a focus on testing. Proficiency in programming languages like TypeScript/JavaScript and Node.js, with the ability to develop robust and reusable test scripts. Ability/desire to write Unit Tests in TypeScript/JavaScript and Node.js Proven ability to analyze and debug complex codebases, troubleshoot multi-tier web architecture issues, and identify root causes of failures. Experience integrating automated tests into CI/CD workflows (e.g., GitHub Actions, Jenkins). Expertise in defining and implementing release, regression, and smoke testing strategies for large, multi-team applications. Experience with white-box testing methodologies to ensure deep validation of internal components. Strong problem-solving and critical-thinking skills, particularly in analyzing blockchain-specific issues. You have a tester mindset, are curious, and excel at designing innovative and interesting test scenarios. You are creative in applying proven tools/test frameworks as well as crafting new solutions to challenging problems. Knowledge of Agile/Scrum methodologies and the software development lifecycle. Excellent verbal and written communication skills for clear bug reporting and collaboration across teams.

We'd Love If You Have:

Experience with testing decentralized applications (dApps), consensus protocols, or blockchain platforms. Experience in running nodes within blockchain networks and monitoring performance metrics. Familiarity with blockchain tools and frameworks (e.g., Web3.js, Hardhat, Truffle). Hands-on knowledge and experience with AI tools (Cursor, Github Copilot, Windsurf, Cline, etc...), and the ability to demonstrate how you utilize them in your day to day. Contributions to open-source projects related to testing, automation, or blockchain. A passion for emerging technologies, including Web3, AI, and distributed systems. Experience using or contributing to the Shardeum open-source repos. Familiarity with blockchain performance benchmarks and profiling tools. Knowledge of the Bitcoin and Ethereum whitepapers.

We are building the infrastructure for Web 3.0. It's going to be a rollercoaster ride but promises to be fun.

Apply Now:

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:

¿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: