Ezra Calloway Senior Web Developer
Brooklyn, NY • ezra.calloway@gmail.com • +1 718-555-0142
Profile Summary
- Senior Web Developer with 7 years of experience in agency and in-house web teams across e-commerce, media publishing, and SaaS marketing sites, specializing in full-stack web development, CMS work, and Core Web Vitals optimization.
- Well-rounded skill set across front-end (React, TypeScript), back-end (Node.js, Express), CMS (WordPress), styling (Tailwind CSS, Sass), and data & hosting (PostgreSQL, Vercel), with strong fundamentals in semantic HTML, accessible markup, and Core Web Vitals discipline.
- Deep expertise in component-driven UI, semantic HTML, Core Web Vitals, and lifecycle ownership, leveraging methodologies such as performance budgets and WCAG audits to drive fast, accessible, and maintainable sites across the lifecycle.
- Engaged collaborator working cross-functionally with Design, Content, SEO, Marketing, and DevOps teams in client-facing web teams, contributing to design hand-offs, content launches, and accessibility reviews with a user-first, standards-first mindset.
- Emerging leader who shares technical excellence and fosters a culture of Core Web Vitals discipline and accessibility-first delivery through code-review office hours and a11y clinics, while leading Web Developer guild sessions and authoring widely adopted component-library and a11y-pattern guides.
Technical Skills
- Front-End Development:
- HTML5, CSS3, JavaScript (ES2024), TypeScript, React, Vue, Svelte, Astro, Web APIs, jQuery (legacy)
- Back-End & APIs:
- Node.js, Express, Next.js API routes, PHP, Python (Django, Flask), Ruby on Rails, REST API design, sessions and auth
- CMS & Website Platforms:
- WordPress (themes, plugins, Gutenberg), Shopify, Drupal, Webflow, Contentful, Sanity, headless CMS integrations
- HTML, CSS & Responsive Design:
- Semantic HTML, Flexbox, CSS Grid, custom properties, Tailwind CSS, Sass, PostCSS, mobile-first breakpoints, design-system collaboration
- Databases & Hosting:
- PostgreSQL, MySQL, MariaDB, MongoDB, Firebase, Supabase, Vercel, Netlify, Cloudflare Pages, WP Engine, AWS Amplify
- Performance, SEO & Accessibility:
- Core Web Vitals (LCP, INP, CLS), Lighthouse, image optimization, lazy loading, schema.org structured data, sitemaps, WCAG 2.2 AA, ARIA, keyboard navigation
- Certifications & Methods:
- AWS Certified Cloud Practitioner, Google Mobile Web Specialist, IAAP CPACC (in progress), MDN Web Docs contributor
- DevOps & Collaboration:
- Git, GitHub Actions, CI/CD pipelines, DNS, SSL/TLS, CDN configuration, Figma hand-offs, client demos, technical scoping briefs
Education
Work Experience
- Translated product vision into the merchant template UI on Squarespace Commerce, leading end-to-end development across 2 squads of engineers and designers and shipping a reusable component library that serves 3.2M active merchant sites.
- Built and maintained the merchant APIs in Node.js with Express, handling session auth, CSRF protection, and background job orchestration for inventory sync; shipped 38 endpoints and cut p95 server response from 420 ms to 180 ms.
- Drove the responsive CSS architecture for storefront templates in Tailwind CSS and Sass, piping design tokens from Figma to CSS custom properties and using container queries and CSS Grid for template layouts; shipped 46 templates and lifted mobile usability from 72 to 98.
- Built dynamic merchant widgets in TypeScript with vanilla DOM plus React islands for performance-critical surfaces, form validation, animation, and Intersection Observer driven storefront feeds, shipping 22 features across the merchant dashboard surface.
- Owned the template engine and headless-CMS integrations on top of WordPress, writing custom block editor extensions and theme-migration tooling with backward-compatible defaults; lifted template editor adoption from 46% to 82%.
- Led a Core Web Vitals optimization program covering responsive images, route-level code splitting, and CDN edge caching, cutting LCP from 3.4s to 1.6s across 3.2M merchant sites.
- Implemented schema.org structured data on product and article pages and ran WCAG 2.2 AA audits with axe-core in CI, closing 180+ findings at a Lighthouse SEO score of 98.
- Owned database integration across 12 schema migrations on 4 customer-facing services using PostgreSQL for product data and MongoDB for blog content, with zero-downtime expand/contract migrations and zero production data loss.
- Ran CI/CD ownership through GitHub Actions for build, test, and Vercel deploys, plus Cloudflare DNS, SSL/TLS, and CDN edge cache management, lifting deploy frequency from weekly to 6x daily with zero rollback escalations across 28 sprints.
- Owned cross-browser testing and site-lifecycle maintenance using BrowserStack across Chrome, Safari, Firefox, Edge, iOS, and Android, with weekly Sentry triage and security patching across WordPress core, plugins, and Node dependencies, holding 99.97% uptime across 18 marketing sites.
- Worked closely with Design, Content, SEO, Marketing, and DevOps teams to coordinate design-system migration across 8 marketing properties, authoring 7 web-ops playbooks (deploy, incident, accessibility audit, theme migration) and mentoring 3 junior Web Developers through their first site rotations.