Job Description
Job Description The Ad Firm is a Digital Marketing Agency based in Southern California, serving clients nationwide. Since 2009, we’ve helped businesses grow through SEO, content, and performance-driven digital strategies. We’re expanding our team and looking for a Senior Web Developer to lead how our websites are built from the ground up. This is not a production role. This is a systems-level engineering role for someone who understands that websites are not just design deliverables, they are performance assets that need to rank, scale, and hold up under real-world conditions. This is a remote position with flexible working hours from day one. About the Role Own the technical foundation of the websites we build Architect, develop, and optimize custom builds for SEO, performance, and scalability Work closely with SEO, Content, and Digital PR teams to ensure strong technical execution Build systems that are clean, scalable, and maintainable Focus on engineering quality over page builders or pre-built themes Key Responsibilities Architect and build fully custom WordPress websites (themes, plugins, ACF-driven structures) Engineer sites for speed, scalability, and strong Core Web Vitals performance Handle server environments, deployments, and infrastructure decisions Integrate APIs and third-party systems cleanly and reliably Own technical SEO implementation (crawlability, indexation, structured data) Manage DNS, CDN (Cloudflare), SMTP, and hosting configurations Work across Shopify and BigCommerce at the code level when needed Implement accurate tracking (GA4, GTM) without compromising data integrity Debug issues across the full stack (server, backend, frontend performance) What We’re Looking For 5+ years of web development experience in agency or performance-driven environments Deep expertise in PHP (including WordPress core-level development) Strong JavaScript experience with modern frameworks and tooling Working knowledge of Python (automation, scraping, tooling) Pro
