Web Developer (Growth & Conversion Optimization)

About the Company

Clay is a growth platform helping organizations turn any growth idea into reality through creative practice, unique data, and AI research. Their mission is to enable thousands of customers—including Anthropic, Notion, Google, and Ramp—to go to market with competitive advantages. In 2025, Clay raised a $100M Series C backed by Sequoia, CapitalG, and First Round, crossing $100M in revenue and reaching a $5B valuation in 2026.

About the Role

Clay is seeking a Web Developer (Growth & Conversion Optimization) to join their team in the New York City Metropolitan Area. This is an exciting opportunity to own the development of high-converting web experiences in Webflow, from concept through launch, while architecting the technical infrastructure that powers growth across landing pages, conversion funnels, and website features. You'll balance rapid shipping with technical excellence, collaborate across Marketing, Product, and Growth teams, and drive measurable improvements in conversion rates through code-driven optimization. This role is perfect for a developer who loves pushing Webflow to its limits, writing production-grade code, and making business-focused technical decisions.

Responsibilities

• Build high-converting web experiences in Webflow, including landing pages, conversion funnels, and website features, with custom JavaScript for interactive elements and advanced CMS architectures
• Develop technical infrastructure powering growth by architecting and implementing integrations, APIs, webhooks, and automation that connect Webflow to the broader marketing and sales stack
• Own conversion optimization through code by designing A/B testing frameworks, experimentation infrastructure, and personalization engines that drive measurable improvements in key metrics
• Analyze funnel data to identify bottlenecks, translate insights into technical solutions, and build features that reduce friction and improve conversion rates
• Ship with technical excellence by balancing speed with quality, making strong technical decisions under pressure, and refining based on real performance data
• Collaborate with Marketing, Product, and Growth teams to understand business objectives and build technical solutions that deliver results
• Explore new ways to create standout web experiences using advanced animations (GSAP), interactive elements (Three.js), and dynamic personalization systems while maintaining performance and accessibility

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 with ability to write clean, maintainable code
• Experience designing and implementing A/B testing frameworks, experimentation infrastructure, and conversion optimization strategies
• Proven ability to architect and implement integrations, APIs, and webhooks connecting web properties to marketing and sales stacks
• Strong understanding of web performance, accessibility, and best practices with pragmatic approach to shipping quality code

Nice to Have

• Experience with GSAP, Three.js, or other advanced animation and interactive libraries
• Familiarity with CRM systems, analytics platforms, and marketing automation tools
• Track record of implementing successful A/B tests that drove measurable improvements in key metrics
• Experience with event tracking architectures and data flow implementation between multiple platforms

Clay is a growth platform that helps organizations turn growth ideas into reality using AI research and unique data signals. The company serves thousands of customers including Anthropic, Notion, Google, and Ramp, and raised a $100M Series C in 2025 at a $5B valuation.