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D3

Sr. Fullstack Engineer

D3, Los Angeles, California, United States, 90079

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Sr. Fullstack Engineer

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D3

About D3

– D3 is building the world’s first purpose‑built blockchain for DomainFi, bringing domain tokenization and DeFi primitives to the 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.

We recently closed a

$25M Series A led by Paradigm , fueling our mission to bring domains fully on‑chain and unlock new financial possibilities.

Job Description We are seeking a highly skilled and experienced Senior Fullstack Engineer to design, develop, and optimize both frontend and backend components that power user‑facing applications, including decentralized applications (dApps), a Web2/Web3‑compatible Registrar, and domain marketplaces.

Responsibilities

Collaborate with product teams 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.

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.

Qualifications

Bachelor’s degree in Computer Science, Software Engineering, or related field.

5+ years frontend development experience (React, Vue, or Angular).

5+ years backend development experience (Node.js with MySQL/Postgres).

Experience building highly scalable, distributed production systems.

Familiarity with CSS frameworks (Tailwind, Bootstrap) and responsive design.

Mobile‑first design principles and optimization for small screens.

Experience with Web3 libraries (web3.js, ethers.js, wagmi).

Event‑driven architecture and asynchronous processing expertise.

Experience with APIs, microservices, and distributed systems.

Basic understanding of blockchain architecture and smart contract interaction.

Strong problem‑solving, adaptability, and self‑motivation skills.

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 Opportunity to work at an ultra‑early‑stage company where every move matters, gain mentorship from industry veterans, and shape the foundation of the future of the Internet.

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