Senior Web Developer (Growth & Conversion Optimization)

About the Company

Clay helps organizations turn any growth idea into reality by providing unique data, signals, and AI research to go to market. With a mission centered on creative growth practices rather than formulas, Clay serves thousands of customers including Anthropic, Notion, Google, and Ramp. The company recently raised a $100M Series C backed by Sequoia, CapitalG, and First Round, and has reached a $5B valuation with a thriving community of 11,000 customers and 30k Slack members.

About the Role

Clay is hiring a Senior Web Developer (Growth & Conversion Optimization) to build high-converting web experiences and own the technical infrastructure powering growth initiatives. Based in Omaha, Nebraska, this role offers the opportunity to work with Webflow at an expert level, architecting landing pages, conversion funnels, and integrations that drive measurable business results. You'll be a technical leader who balances speed with quality, shipping production-ready code while pushing creative boundaries and collaborating closely with marketing, product, and growth teams.

Responsibilities

• Build high-converting web experiences in Webflow, owning the development of landing pages, conversion funnels, and website features from concept through launch with custom JavaScript and advanced functionality
• Develop technical infrastructure that powers growth by architecting integrations, APIs, webhooks, and automation connecting web properties to CRMs, analytics platforms, and marketing automation tools
• Design and implement A/B testing frameworks, experimentation infrastructure, and personalization engines to systematically improve conversion rates and reduce funnel friction
• Analyze funnel data to identify bottlenecks, translate insights into technical solutions, and build features that drive measurable improvements in key conversion metrics
• Partner with Marketing, Product, and Growth teams to translate business objectives into technical solutions, providing guidance and supporting initiatives through launch
• Push technical boundaries by implementing advanced animations with GSAP, interactive elements with Three.js, and dynamic personalization systems while maintaining performance and accessibility
• Balance speed with quality, making strong technical decisions under pressure, keeping stakeholders informed, and refining solutions based on real performance data

Requirements

• 5+ years of professional web development experience, with at least 3 years building conversion-focused websites and landing pages
• Expert-level Webflow development skills including advanced CMS implementations, custom code integration, and complex builds that push the platform's capabilities
• Strong programming fundamentals in JavaScript/TypeScript, HTML5, and CSS3, writing clean and maintainable code
• API integration expertise including REST API clients, webhooks, OAuth flows, and experience connecting web properties to CRMs and marketing automation platforms
• Experience with modern web development tools and frameworks for building scalable, production-grade solutions

Nice to Have

• Experience with advanced animation libraries like GSAP or 3D visualization tools like Three.js
• Background in conversion rate optimization, A/B testing frameworks, or experimentation infrastructure
• Familiarity with event tracking architectures and data flow between marketing technology stacks

Clay is a growth platform that helps organizations turn growth ideas into reality using unique data, signals, and AI research. The company serves thousands of customers including Anthropic, Notion, Google, and Ramp, and recently raised a $100M Series C at a $5B valuation.