Senior Web Developer, OpenZeppelin

• 5+ years of professional web development experience with strong frontend expertise (TypeScript, React, Next.js)
• Proven Sanity expertise. You have built and shipped multiple production websites on Sanity, including schema design, custom Studio components, and GROQ queries
• Experience leading at least one complex CMS migration end-to-end, ideally from HubSpot, WordPress, or another monolithic CMS to a modern headless stack. You know how to preserve SEO rankings, handle redirects, and migrate content cleanly
• Strong understanding of technical SEO, Core Web Vitals, and modern web performance optimization
• Comfort with version control (Git), CI/CD pipelines, and modern deployment platforms (Vercel, Netlify, or similar)
• Experience integrating HubSpot forms and tracking with a Next.js frontend
• An eye for design and strong attention to detail when translating mockups into responsive, production-quality code
• Native or fluent English. You will work daily with non-technical stakeholders and need to translate technical decisions into plain language
• Senior-level autonomy. You will be the only developer on this project, and you need to drive it forward independently
• Deeply AI-native workflow: you use Claude Code (or an equivalent agentic AI coding tool) daily, embedded into your development process. You can articulate where AI accelerates your work and where you override it. You are excited about building AI-first content workflows that enable non-technical teams

Desirable

• The Marketing Team at OpenZeppelin drives awareness and adoption across every product and service we ship, from the flagship OpenZeppelin Contracts Libraries to open source development tooling like Relayers and Monitor and Financial Institutions services
• Working hand-in-hand with Product, Design, Sales, and Open Source Engineering, the team owns messaging, go-to-market strategy, content, and events that position OpenZeppelin as the standard for blockchain development
• As OpenZeppelin's Senior Web Developer (Contractor, not benefits-eligible), you will lead a 6-month project to migrate openzeppelin.com from HubSpot CMS to Sanity + Next.js, replacing our current agency model with an in-house operating model powered by AI
• . You will own the full migration end-to-end — content modeling, schema design, frontend build, HubSpot CRM integration, SEO continuity — and design the component library and Claude Code + Sanity MCP integration that allows the Marketing and Brand teams to operate the website autonomously after the project
• This is a senior, autonomous role. You will be the only developer on this project, working directly with Marketing and Brand stakeholders
• The output of this engagement is a modern, fast, AI-native website that the OpenZeppelin team can run themselves
• Should we feel the need at the end of the engagement, we are open to a contract extension and/or a small ongoing retainer to support the team as we settle into the new operating model
• Lead the end-to-end CMS migration from HubSpot to Sanity + Next.js, including content modeling, schema architecture, content migration, URL preservation, redirects, and SEO continuity
• Design and build a comprehensive library of reusable, design-approved components in collaboration with the Brand team, enabling the Marketing team to publish pages autonomously after migration
• Integrate HubSpot CRM (forms, lead capture, tracking) and GA4 analytics into the new stack so Sales and Marketing keep everything they rely on today
• Set up the Claude Code + Sanity MCP integration, configure access and permissions, and train the Marketing and Brand teams to operate the website through natural language commands to Claude
• Implement technical SEO and AIO optimization through schema markup, structured data, Core Web Vitals improvements, and content structures optimized for AI-driven discovery
• Manage the underlying website infrastructure including CI/CD pipelines, staging environments, hosting (Vercel or similar), and monitoring to ensure reliability and fast iteration cycles
• Build interactive elements where needed (live stats dashboards, embedded tools, custom landing page experiences) that reflect OpenZeppelin's identity as a leading technology and security company
• Document architecture, workflows, and team-facing processes thoroughly so OpenZeppelin is genuinely self-sufficient at the end of the engagement
• Handle ongoing website requests (new pages, bug fixes, integrations) during the engagement period

• Our interview process takes place on Google Meet and tends to consist of the following stages:
• Recruiter Call (30-45 mins)
• Hiring Manager Call (60 mins)
• Team Interview (30 mins)
• Paid work trial (10-20 hours of paid work)
• Reference checks
• Please let us know if you require any accommodations for the interview process, and we’ll do our best to provide assistance