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

How to Apply:

We do not monitor emails on this website. Submit your application at ---------- = to be considered for this position.