Phil O'Sullivan || Home

Full-Stack Software Engineer • Enterprise CMS & API Architect_

High-impact Full-Stack Software Engineer with over 25 years of experience architecting, modernizing, and scaling high-traffic digital publishing platforms and API microservices. Expert in the PHP 8.x ecosystem, WordPress Core & Gutenberg Block API (React/JS), and custom RESTful/GraphQL API design. Proven track record of delivering high-performance integrations including Apple News/News+ syndication pipelines, OAuth2 Single Sign-On (SSO) community ecosystems, AdTech monetization (Prebid.js), and edge delivery optimization using Fastly CDN (VCL). Leverages DevOps workflows (Jenkins, GitHub Actions, Docker) to manage secure, compliant (GDPR & VPPA), and Core Web Vitals-optimized enterprise web architectures.

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Enterprise Scale
	Architected and scaled high-traffic digital publishing platforms. Designed Apple News/News+ syndication pipelines, AdTech integrations, and edge delivery using Fastly CDN. 
  
CMS & API Architect
	Designed site-wide Gutenberg/React editor migrations, custom API microservices, and Single Sign-On (SSO) user ecosystems. 
  
Data Engineering
	Re-engineered legacy database feeds and built real-time data pipelines (e.g. real estate listing systems) syncing high-volume content with zero downtime. 
  
AdTech & Monetization
	Integrated programmatic advertising stacks (Prebid.js), created high-performance video units, and engineered custom native ad templates. 
  
DevOps & Infrastructure
	Automated deployment workflows via CI/CD pipelines, managed server migrations (AlmaLinux), and optimized caching layers for web stability. 
  
USMC Veteran
	Tactical execution and analytical precision shaped by service in the US Marine Corps, combined with modern Agile team leadership. 

Technical Competency Profile

System Architecture & API Design 95%

Backend Engineering (PHP/Node/Python) 92%

WordPress Core & Gutenberg Blocks 90%

DevOps & Infrastructure (CI/CD) 85%

Agentic AI & LLM Automation 88%

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Hover over any technical area on the left to view detailed architecture insights, project achievements, and specialized stack experiences.