Sr. Fullstack Engineer

About D3:

[D3]( is building the world’s first purpose-built blockchain for [ DomainFi ]( domain tokenization and DeFi primitives to a massive, rapidly growing $350B+ real-world asset class . We’re revolutionizing how existing and future domain names are owned, traded, and leveraged in the digital economy.

Our elite team is stacked with  industry veterans who have spent  the last three decades shaping the internet , from pioneering domain name monetization to architecting key internet protocols to launching and running major TLDs like  .xyz, .inc, .tv, and .link . With a proven track record of innovation and success, we’re now redefining what’s possible in the domain space.

We recently closed a [$25M Series A led by Paradigm ]( - one of the best investors in the industry. This will help fuel our mission to bring domains fully on-chain and unlock new financial possibilities for one of the internet’s most valuable asset classes.

We’re based in Los Angeles, with team members all over the world. We’re looking for driven, talented builders to help build a trillion-dollar DomainFi economy. Join us!

Job Description

We are seeking a highly skilled and experienced Senior Fullstack Engineer to join our team. In this role, you will design, develop, and optimize both frontend and backend components that power our user-facing applications, including decentralized applications (dApps), a Web2/Web3-compatible Registrar, and domain marketplaces. You will play a critical part in building scalable, secure, and user-friendly systems that bridge traditional DNS with blockchain-based naming technologies.

Familiarity with token standards (ERC-721, ERC-1155, ERC-20), wallet integrations, event-driven architectures, and distributed systems is essential.

Responsibilities

Frontend

• Collaborate with the product team to translate requirements into technical specifications and user-facing features.
• Develop and maintain frontend components of the domain registrar and marketplace using Next.js, Typescript, React, GraphQL, HTML, and CSS .
• Design and implement dApps that seamlessly integrate Web2 and Web3 APIs.
• Build pixel-perfect UI from wireframes and high-fidelity mocks with attention to detail.
• Contribute to open-source SDKs enabling developers to integrate Doma Protocol into their apps.
• Write and maintain unit, integration, and E2E tests.
• Ensure accessibility (WCAG), SEO, web performance best practices, scalability, and security.

Backend

• Design, implement, and maintain backend services to support registrar features, domain tokenization, and Web2/Web3 marketplaces.
• Build robust systems for payment processing , integrating fiat and crypto gateways.
• Develop backend systems supporting event-driven architectures and asynchronous processing with Kafka, RabbitMQ, or similar tools.
• Write scalable APIs, ensuring code quality through reviews, testing, and debugging.
• Maintain and optimize existing services for performance and reliability.
• Stay up to date with best practices and emerging technologies in web and blockchain development.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related field (advanced coursework and certifications are a plus).
• 5+ years frontend development (React, Vue, or Angular).
• 5+ years backend development (Node.js with MySQL/Postgres).
• Experience building highly scalable, distributed production systems.
• CSS frameworks (Tailwind, Bootstrap) and responsive design.
• Mobile-first design principles and optimization for small screens.
• Web3 libraries (web3.js, ethers.js, wagmi).
• Event-driven architecture and asynchronous processing.
• Experience with APIs, microservices, and distributed systems.
• Basic understanding of blockchain architecture and smart contract interaction.
• Strong problem-solving, adaptability, and self-motivation.
• Familiarity with Git, Agile methodologies, and CI/CD practices.
• Excellent communication and teamwork skills.

Pluses

• Smart contract development (Solidity).
• Experience with React Native or mobile development.
• Familiarity with EPP (Extensible Provisioning Protocol) in domain systems.
• Experience with NestJS, GraphQL .
• DevOps experience (Kubernetes, AWS, GCP, DigitalOcean, Linux).
• Accessibility design knowledge.

Why D3, Why Now?

Ground-Floor Growth, Learning, and Impact : D3 is your chance to dive headfirst into an ultra-early-stage company where every move you make truly matters. You’ll have the opportunity to sharpen your skills, expand your expertise, and shape the foundation of something groundbreaking. Almost everything we’re building today at D3 is “zero-to-one,” meaning you’ll be among the first to craft, refine, and launch key initiatives that define our future success. Strong, Proven Leadership : At D3, you’ll work alongside industry visionaries who have been there, done that, and are ready to do it again—only bigger. Our leadership team brings veteran industry experience, sharp insights, and a relentless drive to do big things across every function at D3. You’ll gain invaluable mentorship, develop a high-impact mindset, and be challenged to grow in ways you never imagined. Unique Market Positioning – We’re pioneering at the intersection of internet infrastructure, real-world assets, and blockchain communities, creating solutions that redefine what’s possible in Web3. If you want to push boundaries, solve complex problems, and be part of a team that’s shaping the future of the Internet, D3 is the place to do it.