Web Developer (Growth & Conversion Optimization) Job at Clay in New York
Clay, New York, NY, United States
Overview
Senior Web Developer (Growth & Conversion Optimization)
This role focuses on building high-converting web experiences, developing the technical infrastructure that powers growth, and driving conversion optimization through code. It emphasizes delivering fast, maintainable solutions that meet business goals and user needs.
What You'll Do
Build high-converting web experiences in Webflow. Own the development of landing pages, conversion funnels, and website features from concept through launch. Write custom JavaScript for interactive elements, build CMS architectures, and push Webflow to its limits with advanced functionality. Ship quickly with a fast launch cadence from brief to production-ready code without heavy handoffs.
Develop the technical infrastructure that powers growth. Architect and implement integrations, APIs, webhooks, and automation that connect web properties to the broader marketing and sales stack. Build custom middleware, debug complex integration issues, implement event tracking architectures, and ensure data flows between Webflow, CRM, analytics platforms, and marketing automation tools. Write production-grade, maintainable, scalable code.
Own conversion optimization through code. Design and implement A/B testing frameworks, experimentation infrastructure, and personalization engines to systematically improve conversion rates. Analyze funnel data, translate insights into technical solutions, and build features that reduce friction and drive measurable improvements.
Ship with technical excellence and collaboration. Balance speed with quality, know when to refactor, and keep stakeholders informed without slowing down. Be opinionated about code quality, web performance, and best practices while remaining pragmatic about shipping.
Collaborate to translate business goals into technical solutions. Partner with Marketing, Product, and Growth teams to understand objectives and build solutions that deliver results. Lead development projects, provide technical guidance to stakeholders, and translate non-technical requirements into clean, efficient code.
Push technical boundaries while maintaining reliability. Explore advanced animations, interactive elements, and personalization systems while preserving performance, accessibility, and alignment with user experience and business goals.
What You'll Bring
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
Strong programming fundamentals in JavaScript/TypeScript, HTML5, and CSS3. Write clean, maintainable code
API integration expertise—building REST API clients, implementing webhooks, handling OAuth flows, and debugging integration issues with CRMs, marketing automation platforms, and analytics tools
Experience with modern web development tools and frameworks: Git, Node.js, React (or similar), serverless functions, and build tools. Familiarity with Three.js, GSAP, and animation libraries is a plus
Proven track record of improving conversion rates through technical implementation of tests, optimizations, and experiments. Understand A/B testing methodology, statistical significance, and CRO best practices
Web performance focus—optimize for Core Web Vitals, write efficient code, and ship measurable performance improvements
Portfolio demonstrating exceptional development skills: live websites, complex functionality, and end-to-end technical execution. Include code samples or GitHub repositories
Systems mindset for scalable, maintainable codebases and reusable components, with the flexibility to move fast when needed
Strong collaboration and communication skills—keep stakeholders informed and explain technical concepts to non-technical teams
Analytical thinking paired with business acumen. Understand how code impacts conversion metrics, user behavior, and revenue
Ability to work autonomously, taking projects from requirements through deployment with minimal oversight while keeping teams aligned
Get-it-done attitude with high standards. You ship, you iterate, you improve
Bonus Points For
Experience with analytics platforms (GA4, Segment, Mixpanel) and implementing custom tracking
Backend development experience or full-stack capabilities
Understanding of technical SEO and search optimization
Previous experience in high-growth startups or fast-paced environments
Contributions to open-source projects or technical writing
#J-18808-Ljbffr
Senior Web Developer (Growth & Conversion Optimization)
This role focuses on building high-converting web experiences, developing the technical infrastructure that powers growth, and driving conversion optimization through code. It emphasizes delivering fast, maintainable solutions that meet business goals and user needs.
What You'll Do
Build high-converting web experiences in Webflow. Own the development of landing pages, conversion funnels, and website features from concept through launch. Write custom JavaScript for interactive elements, build CMS architectures, and push Webflow to its limits with advanced functionality. Ship quickly with a fast launch cadence from brief to production-ready code without heavy handoffs.
Develop the technical infrastructure that powers growth. Architect and implement integrations, APIs, webhooks, and automation that connect web properties to the broader marketing and sales stack. Build custom middleware, debug complex integration issues, implement event tracking architectures, and ensure data flows between Webflow, CRM, analytics platforms, and marketing automation tools. Write production-grade, maintainable, scalable code.
Own conversion optimization through code. Design and implement A/B testing frameworks, experimentation infrastructure, and personalization engines to systematically improve conversion rates. Analyze funnel data, translate insights into technical solutions, and build features that reduce friction and drive measurable improvements.
Ship with technical excellence and collaboration. Balance speed with quality, know when to refactor, and keep stakeholders informed without slowing down. Be opinionated about code quality, web performance, and best practices while remaining pragmatic about shipping.
Collaborate to translate business goals into technical solutions. Partner with Marketing, Product, and Growth teams to understand objectives and build solutions that deliver results. Lead development projects, provide technical guidance to stakeholders, and translate non-technical requirements into clean, efficient code.
Push technical boundaries while maintaining reliability. Explore advanced animations, interactive elements, and personalization systems while preserving performance, accessibility, and alignment with user experience and business goals.
What You'll Bring
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
Strong programming fundamentals in JavaScript/TypeScript, HTML5, and CSS3. Write clean, maintainable code
API integration expertise—building REST API clients, implementing webhooks, handling OAuth flows, and debugging integration issues with CRMs, marketing automation platforms, and analytics tools
Experience with modern web development tools and frameworks: Git, Node.js, React (or similar), serverless functions, and build tools. Familiarity with Three.js, GSAP, and animation libraries is a plus
Proven track record of improving conversion rates through technical implementation of tests, optimizations, and experiments. Understand A/B testing methodology, statistical significance, and CRO best practices
Web performance focus—optimize for Core Web Vitals, write efficient code, and ship measurable performance improvements
Portfolio demonstrating exceptional development skills: live websites, complex functionality, and end-to-end technical execution. Include code samples or GitHub repositories
Systems mindset for scalable, maintainable codebases and reusable components, with the flexibility to move fast when needed
Strong collaboration and communication skills—keep stakeholders informed and explain technical concepts to non-technical teams
Analytical thinking paired with business acumen. Understand how code impacts conversion metrics, user behavior, and revenue
Ability to work autonomously, taking projects from requirements through deployment with minimal oversight while keeping teams aligned
Get-it-done attitude with high standards. You ship, you iterate, you improve
Bonus Points For
Experience with analytics platforms (GA4, Segment, Mixpanel) and implementing custom tracking
Backend development experience or full-stack capabilities
Understanding of technical SEO and search optimization
Previous experience in high-growth startups or fast-paced environments
Contributions to open-source projects or technical writing
#J-18808-Ljbffr