Senior Web Developer (Growth & Conversion Optimization)

Senior Web Developer (Growth & Conversion Optimization) ABOUT CLAY Our mission is to help organizations turn any growth idea into reality. We see growth as a creative practice, not a formula. Finding and reaching your best-fit customers takes unique ideas and constant iteration. As AI makes execution faster and tactics easier to copy, creativity is the only lasting advantage. We're already helping thousands of customers https://clayrun.notion.site/Wall-of-Love-b243f2b67607438b9fad99341e6b8d47 — including Anthropic, Notion, Google, and Ramp — go to market with unique data, signals, and AI research. In 2025, we raised a $100M Series C https://www.nytimes.com/2025/08/05/business/dealbook/clay-ai-marketing-fundraise.htmlbacked by world-class investors including Sequoia, CapitalG, and First Round — and crossed $100M in revenue. In 2026, we announced our second employee tender offer https://www.nytimes.com/2026/01/28/business/dealbook/clay-start-up-tender-offers.html in 9 months at a new $5B valuation. We also launched a community equity round https://www.clay.com/blog/community-equity-offering, for our customers, agency partners, and club members. Some things to know about us: - Our community http://community.clay.com includes 11,000+ customers, 150+ integration partners, 125+ agencies, 50+ Clay clubs https://luma.com/claylive, and 30k members on Slack. - Our culture https://nextplayso.substack.com/p/spotlight-clay is unique inside and outside of work. Our team members are also DJs, activists, writers, clowns, marathoners, skydivers, psychedelic therapists, social workers, and more. - All employees can work for free with world-class coaches who specialize in creativity, management, and more. - Our operating principles — including negative maintenance and non-attached action — guide our work. Read more about them here https://cdn.prod.website-files.com/61477f2c24a826836f969afe/685d83a71452245cc1129791_4d770abfd83e276ec15315a2e06945bd_Clay2025_OperatingPrinciples.pdf. - Read about us in the NYT https://www.nytimes.com/2025/08/05/business/dealbook/clay-ai-marketing-fundraise.html, Forbes http://google.com/search?q=forbes+clay&rlz=1C5OZZY_enUS1155US1155&oq=forbes+clay&gs_lcrp=EgZjaHJvbWUyBggAEEUYOTIHCAEQABiABDIHCAIQABiABDIHCAMQABiABDIHCAQQABiABDIHCAUQABiABDIHCAYQABiABDIHCAcQABiABDIHCAgQABiABDIHCAkQABiABNIBBzkzM2owajSoAgOwAgHxBVAe8UAxJx_p&sourceid=chrome&ie=UTF-8, First Round Review https://review.firstround.com/podcast/inside-clays-unconventional-path-to-1-25b/, and more https://www.clay.com/press. Hear from our employees directly on our Glassdoor https://www.glassdoor.com/Overview/Working-at-Clay-EI_IE9850794.11,15.htm page! SENIOR WEB DEVELOPER (GROWTH & CONVERSION OPTIMIZATION) WHAT YOU'LL DO Build high-converting web experiences in Webflow. You'll own the development of landing pages, conversion funnels, and website features from concept through launch. This includes writing custom JavaScript for interactive elements, building CMS architectures, and pushing Webflow to its limits with advanced functionality. You'll ship quickly with a fast launch cadence, moving from brief to production-ready code without heavy handoffs. Develop the technical infrastructure that powers growth. You'll architect and implement the integrations, APIs, webhooks, and automation that connect our web properties to the broader marketing and sales stack. This means building custom middleware, debugging complex integration issues, implementing event tracking architectures, and ensuring data flows seamlessly between Webflow, our CRM, analytics platforms, and marketing automation tools. You'll write production-grade code that's maintainable, scalable, and built to last. Own conversion optimization through code. You'll design and implement A/B testing frameworks, experimentation infrastructure, and personalization engines that enable systematic improvement of conversion rates. You'll analyze funnel data to identify bottlenecks, translate insights ... (truncated, view full listing at source)