¿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!

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About CoW DAO

CoW DAO is on a mission to protect Ethereum users from the dangers of DeFi. It does this by supporting the development of CoW Protocol, CoW Swap, MEV Blocker, and CoW AMM, and by funding values-aligned projects through the CoW Grants Program.

CoW Protocol is the second-largest DEX aggregator by monthly volume and the first-largest intents-based exchange. MEV Blocker is currently involved in ~4% of all Ethereum transactions, making it the category leader. CoW AMM is the only live AMM that protects LPs from LVR (loss-versus rebalancing).

As a member of CoW DAO’s core team, you will have the opportunity to shape these essential products, and contribute to the Ethereum ecosystem more broadly.

About the role

Location: We are a fully remote team, and although we hire almost globally, there is a preference for this role to be based in Europe or remote +/- 4 hours CEST time

Please note we’re not hiring from the US, Australia, or New Zealand

Position: Full-time contractor

We’re looking for a passionate Senior Frontend Engineer to help take decentralized trading to the next level. You’ll take charge of our CoW DAO products and help shape what’s coming next, making sure the user experience is smooth across trading interfaces, analytics, docs, and more.

We’re after someone who’s a great communicator, loves working with a team, and is eager to learn (especially about blockchain). If you thrive on ownership, like solving problems, and are curious about the world of blockchain, this might just be the role for you.

Tech stack we work with

• Frontend: Typescript, React, styled-components
• Web3: Web3, ethersjs, Hardhat, Solidity, IPFS, TheGraph, ENS
• Testing: Jest, Cypress, React Testing Library
• Analytics: Dune Analytics, Google Analytics

What you’ll be doing

• Develop and improve user-facing applications like CoW Swap on top of the CoW Protocol
• Build and implement new features quickly, with a focus on performance, accessibility, and quality
• Decide when to create reusable abstractions and when to build one-off features, always keeping scalability and maintainability in mind
• Contribute to the product roadmap by proposing new features, sharing design ideas, and helping the team prioritize tasks
• Push the boundaries of decentralized user interfaces. Our products are hosted traditionally but also deployed on decentralized networks like IPFS/ENS, and we work with decentralized infrastructure like The Graph and Ethereum nodes

What we’re looking for

• Experience: 3+ years of professional experience building client-side web apps
• Technical skills: Expertise in front-end technologies (React, TypeScript, CSS, state management libraries like Redux, Recoil, or Jotai)
• Code quality: Ability to review and guide the team on architecture, code quality, and best practices
• Problem-solving: Strong debugging and problem-solving abilities
• Team player: Excellent communication skills and a willingness to collaborate and share knowledge
• Self-driven: You take ownership of your work and are proactive about learning and growing in your career
• Blockchain knowledge: Experience integrating frontend with smart contracts and familiarity with tools like Web3.js, Ethers.js
• Product vision: A solid understanding of the crypto DApp ecosystem, user experience, and market trends

Bonus points if you have:

• DevOps & tooling: Experience with CI/CD pipelines, testing frameworks, and deployment tools; familiarity with cloud services (AWS, GCP, etc.)
• Backend experience: Knowledge of Node.js, databases, and RESTful or GraphQL APIs

What we can offer

• Flexible work environment: Join our hub in Lisbon or work remotely
• Token plan: Have a stake in our mission and shape the future of CoW DAO
• Periodic gatherings: Enjoy opportunities to connect with the rest of the team through regular trips
• Conference allocation: Stay up-to-date with ecosystem advancements using our conference budget
• Learning budget: Use our learning budget to support your higher ambitions
• Hardware budget: Take advantage of a hardware budget for acquiring necessary equipment
• Make an impact: You are joining a startup where you can make a huge difference. Your work matters!
• Flat hierarchies mean fewer processes and bureaucracy - see more of your ideas come to life!
• Flexible work and vacation times: Prioritize work-life balance through our robust flexible work policy and vacation allowance
• Growth: If you’re someone who loves taking the initiative and getting things done, CoW offers lots of opportunities for your individual growth

Referral Program

Earn 3.000 USDC or USD with the refer-to-earn program. More details here.

Culture

Life within the CoW Protocol is an incredible adventure! We take pride in our collaborative approach, embracing autonomy and fostering a culture of big thinking and continuous growth. We value impact, ownership, simplicity, and team spirit. Plus, we’re all about feedback, coming together, and enjoying the journey along the way!

At CoW Protocol, we strive to create a space where everyone feels included and empowered. We believe that our products and services benefit from our diverse backgrounds and experiences. All qualified applicants are considered for positions regardless of race, ethnic origin, age, religion or belief, marital status, gender identification, sexual orientation, or physical ability.

As stewards of the Polkadot and Substrate ecosystem, Parity is laying the foundation for a better web which respects the freedom and data of individuals and empowers developers to create better services through decentralised technology. The internet is too important to billions of people for it to be at the mercy of a few powerful companies. 

With a remote-first, global team, Parity is building open-source technologies for developers and organisations to implement and build upon. Our Web3 tech stack includes Polkadot, Substrate, and Kusama.

We believe in a decentralised web that respects the freedom and data of individuals and empowers developers to create better services. Our vision is to create a world based on truthful, rather than trustful, interactions. Our mission is to make Polkadot the most active and innovative community in blockchain.

People in our collective are:

• Highly motivated to contribute to Parity’s mission and be part of something bigger

• Excited to work on projects that are groundbreaking and complex

• Autonomous workers that self-initiate, but also collaborate well with others

• Taking maximum accountability and having minimum ego at work

• Comfortable with chaos and adapting to the ever-changing Web3 space

• Continuously educating themselves about Parity and the wider ecosystem

About the team:

At Parity Technologies, we’re redefining the way the world interacts with Polkadot.. Our greenfield Mobile App team’s mission? To build the most seamless, secure, and cutting-edge digital wallet experience for both web and native platforms. If you’re a developer who thrives on innovation, enjoys pushing boundaries, and wants to shape the future of decentralized finance, read on:

About the position:

Picture this: You’re leading the charge in crafting a next-gen digital wallet—one that’s intuitive, secure, and lightning-fast. This isn’t just another app; it’s the gateway for users to interact with Polkadot and the decentralised world beyond.

• Architect & Build – You’ll design and develop a fluid, high-performance mobile and web wallet that empowers users to manage crypto assets effortlessly.

• Bridge Web2 and Web3 – Your work will ensure a seamless transition between traditional fintech experiences and decentralised technologies.

• Innovate & Optimise – Tackle challenges like gas fee optimisations, cross-chain transactions, and zero-trust security models.

• Create Beautiful UX – Work alongside designers to build smooth, intuitive interfaces that make crypto adoption easy for everyone.

• Stay Cutting-Edge – Implement the latest blockchain SDKs, cryptographic security measures, and real-time transaction tracking.

• Collaborate Globally – Work with engineers, product managers, and the wider blockchain community to push the limits of what’s possible.

About you:

You’ll be working with

• Frontend: React Native, TypeScript, React (for web wallet)

• Mobile: Swift (iOS), Kotlin (Android)

• Backend: Node.js, GraphQL, Firebase, Go (occasionally)

• Security: End-to-end encryption, Secure Enclave, biometric authentication

• DevOps: Docker, Kubernetes, CI/CD pipelines

Who You Are

• A mobile/web developer with a passion for Web3, DeFi, or crypto applications.

• Comfortable building for both native (iOS/Android) and web platforms

• Excited to solve complex problems in scalability, UX, and decentralised technologies.

Nice To Have

• Familiar with wallet security, cryptography, and blockchain interactions.

• Blockchain: Substrate, Polkadot.js, Ethereum Web3.js, Rust (for deeper blockchain integrations)

About working for us:

• Competitive remuneration packages based on iterative market research, including tokens (where legally possible)

• “Future of work” environment that’s remote-first and self-initiating with flexible hours

• Team mates that are genuinely excited about their impact and projects

• Access to the brightest minds in this space to learn about Web3 and develop your skills and knowledge while on the job

• Becoming part of the wider ecosystem (career and networking opportunities)

• Team and company-wide retreats

• Work laptop

Those joining our collective as an employee in Germany, Portugal, Switzerland and the U.K. also enjoy benefits such as health care, parental leave, PTO (28 days per year), local team events, yearly L&D budget, and language classes.

Parity is an Equal Opportunity Employer. We welcome diversity in our global team and care about everyone in our collective feeling included and welcome.

View our Applicant Notice to see how we use your data. 

Is this position not quite your match? Browse our other open roles.

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This role is for Weekday's client.

Please note this is a contract position, with possible extension based on project needs.

Job Overview: We are seeking a highly skilled Blockchain Developers to join our network and collaborate with cutting-edge startups. You will be responsible for designing, developing, and implementing blockchain-based applications, ensuring security, scalability, and efficiency.

Key Responsibilities:

1. Develop and maintain blockchain-based applications and smart contracts.
2. Design and implement secure blockchain protocols and architectures.
3. Collaborate with product managers, designers, and other engineers to integrate blockchain solutions.
4. Ensure the security, performance, and scalability of blockchain applications.
5. Research and stay up to date with emerging blockchain technologies and trends.
6. Optimize blockchain applications for efficiency and low transaction costs.
7. Conduct code reviews and provide technical guidance to team members.

Required Qualifications:

1. Bachelor's degree in Computer Science, Engineering, or a related field.
2. 3+ years of experience in blockchain development.
3. Proficiency in blockchain platforms such as Ethereum, Hyperledger, or Solana.
4. Strong programming skills in Solidity, Rust, or Go.
5. Experience with smart contract development and security best practices.
6. Knowledge of cryptographic principles and distributed ledger technologies.
7. Familiarity with blockchain consensus mechanisms and decentralized applications (dApps).
8. Ability to work independently and manage multiple projects in a fast-paced startup environment.

Preferred Qualifications:

1. Experience working in a startup or consulting environment.
2. Understanding of tokenomics and DeFi applications.
3. Familiarity with Web3.js, Truffle, Hardhat, or other blockchain development frameworks.
4. Exposure to cloud-based blockchain infrastructure (AWS, Azure, GCP).
5. Strong problem-solving skills and ability to optimize blockchain performance.

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