T

Senior Web Developer

icon building Company : The Ad Firm
icon briefcase Job Type : Full Time
icon remote-alt Remote / Work from Home

Number of Applicants

 : 

000+

Click to reveal the number of candidates who applied for this job.
icon loader
Apply Now
icon loader Apply Now

Let AI Supercharge Your Job Hunt!

JobCopilot scans 500,000+ company career sites daily to find jobs for you

Never miss an opportunity Save hours by auto-filling applications forms Land more interviews with tailored applications
happy man
thunder iconActivate JobCopilot

Job Description - Senior Web Developer

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)

  • Proven experience building custom WordPress websites from scratch

  • Strong understanding of technical SEO and its impact on architecture and performance

  • Ability to diagnose and solve full-stack issues independently



What Sets You Apart



  • You think in systems, not pages

  • Experience working on large-scale or SEO-heavy websites

  • Strong understanding of crawlability, indexation, and internal linking at scale

  • Experience with schema and structured data implementation

  • Exposure to programmatic SEO or dynamic page generation

  • Experience handling real-world constraints (traffic spikes, broken deployments, legacy rebuilds)



Strong Advantages



  • Experience with CI/CD pipelines and Git workflows

  • Familiarity with Docker or modern dev environments

  • Experience with log analysis and advanced debugging

  • Security hardening and site recovery experience

  • Experience with multi-site or multi-location SEO builds



What We Don’t Want



  • Heavy reliance on page builders

  • Plugin-first approaches to performance and SEO

  • Developers who need constant direction or step-by-step instructions



Why Join Us?



  • High ownership with real technical decision-making

  • Clean builds with no unnecessary bloat

  • Direct collaboration with SEO, Content, and Digital PR specialists

  • A team that values performance, scalability, and engineering quality

  • Competitive salary and performance-based incentives

  • Flexible remote work from day one

  • 2 weeks Paid Time-Off

  • Paid Sick Leave

  • 8 Paid Holidays

  • Health Insurance



Ready to Apply?



  • Submit your resume

  • Include a portfolio with examples of custom builds

  • Add a short note on how you approach building high-performance websites

Original job Senior Web Developer posted on GrabJobs ©. To flag any issues with this job please use the Report Job button on GrabJobs.
Apply Now
Share Job
Share Job

Auto-Apply to Web Developer Jobs with your AI JobCopilot

thunder icon Auto-Apply with AI

Similar Web Developer Jobs in the US

GrabJobs is the no1 job portal in the US, connecting you to thousands of jobs fast! Find the best jobs in the US, apply in 1 click and get a job today!

Mobile Apps

Copyright © 2026 Grabjobs Pte.Ltd. All Rights Reserved.