Sr. Frontend Engineer - Marketing

About the Role: Close is seeking a Sr. Frontend Engineer - Marketing to own the technical integrity of Close.com, the company’s marketing website. This role is responsible for maintaining, optimizing, and instrumenting the site, working closely with Marketing while reporting through Engineering.

You are:

• A marketing website engineer with 5+ years of experience building conversion-focused websites. You’re comfortable with modern stacks like Astro and headless CMS (Sanity), and you prioritize performance, SEO, and AI agent readability alongside aesthetics.

• Fluent in measurement and analytics tools like Segment, Amplitude, or Customer.io. You understand cookies, conversion events, and experimentation tooling.

• Driven by conversion and impact. Your work directly influences traffic, conversion, and revenue—key metrics for Close’s self-service SMB business.

• Energized by empowering non-technical teams. You build systems for Marketers and Designers to self-serve, including guardrails, automations, and tooling.

• Already building with AI—leveraging it for efficiency while maintaining craftsmanship and taste.

• Resourceful and collaborative, bridging Marketing and Engineering to tackle tasks of all sizes.

You will:

• Build and continuously improve close.com, ensuring it’s responsive, highly interactive, and polished with animations and interactivity.

• Optimize performance, technical SEO, and AI agent visibility to enhance findability.

• Manage the site’s infrastructure, including Sanity CMS, components, integrations, and deployments on Vercel.

• Own technical measurement integrity, ensuring accurate tracking, attribution, and conversion events flow into marketing/data systems.

• Build self-serve tools for Marketing (e.g., page campaigns, experiments) and enable the site to self-improve via automations and AI collaboration.

• Act as an engineering resource for Marketing, solving cross-functional problems—whether by tackling tasks yourself or guiding others.