OPEN TO WORK

SEAN CONNOLLY

SOFTWARE ENGINEER

I build high-performing websites and web apps that scale and stay stable.

Lead Software Engineer • 20+ production sites

Performance + technical SEO focus

WordPress • React • PHP • JavaScript • SQL

UK • Open to remote/hybrid

ABOUT ME

I’m a full-stack software engineer who builds websites that load fast, rank well, and actually convert. With experience leading development teams and delivering 20+ production sites, I specialise in WordPress, React, and performance optimisation.

My RAF training taught me that deadlines aren’t suggestions and problems don’t wait for perfect conditions. Combined with first-class honours in Computer Science and years of competitive athletics, I bring the same discipline to development—whether that’s shipping features under pressure or methodically debugging at 2am.

Recent wins: Led security incident response across 5 client sites, cutting remediation time from days to hours. Improved Core Web Vitals scores from red to green on sites averaging 50k monthly visitors. Mentored junior developers while managing agency workloads across 20+ active WordPress builds.

Key Highlights

First-class honours in Computer Science
#1 design award for university capstone project
Lead Software Engineer managing 20+ production WordPress sites
RAF-trained discipline under pressure
Performance specialist with focus on Core Web Vitals and technical SEO

SKILLS & EXPERTISE

Proficient

Intermediate

Learning

HTML5 CSS3 JavaScript PHP SQL Python Lua Java Kotlin C# C++ Go Dart

WordPress WooCommerce Elementor Avada React Node.js Express Laravel Tailwind CSS jQuery Spring Boot Flutter Godot

Custom Theme Development Child Themes Custom Plugins Hooks (Actions & Filters) Custom Post Types & Taxonomies Template Hierarchy ACF (Advanced Custom Fields) Gutenberg Blocks (Integration) Script Optimisation (Defer/Delay/Unload) REST API (Consumption) WP-CLI Custom Gutenberg Block Development Headless WordPress

Technical SEO On-Page SEO Metadata Optimisation Structured Content & Internal Linking Core Web Vitals (LCP/CLS/INP) Asset Optimisation (WebP/AVIF) Caching & Optimisation (WP Rocket) Script Management (Asset CleanUp) Consent Management (Complianz) Redirects & Broken Link Remediation Schema Markup (Implementation) Log File SEO

Git GitHub VS Code Chrome DevTools Linux Hosting Management cPanel Postman MySQL Figma Docker Firebase AWS CI/CD (Basic) Nginx/Apache Tuning Infrastructure as Code

WooCommerce Configuration Product & Category Architecture Checkout UX Improvements Ticketing with WooCommerce Products Payments Troubleshooting Shipping & Tax Rules (Setup) Subscriptions/Memberships

Third-Party API Integration WooCommerce Hooks for Integrations WordPress REST API (Build/Extend) Webhooks Authentication (OAuth/JWT) Basics

MySQL Database Optimisation (Basic) PostgreSQL MongoDB

WordPress Security Hardening Updates, Patch Management & Backups Cookie & Consent Compliance (UK/EU) Role-Based Access (WordPress) Vulnerability Triage (Basic) Application Security (OWASP Basics)

Core Strengths

🎯 Technical Leadership

💬 Stakeholder Communication

🔧 Problem Solving & Debugging

⚡ Performance Optimisation

🚀 Adaptable & Solution-Driven

📈 SEO Strategy & Implementation

🧩 Systems Thinking

🧠 Analytical, Evidence-Driven Decisions

⏱️ Project & Time Management

FEATURED PROJECTS

Client Work

GLO Holiday Club

Full website build for a holiday membership club. Developed custom layouts, responsive design, and seamless user experience. Delivered as part of my role at Opus 4 Marketing.

WordPress Elementor Custom CSS PHP

Live Site

Client Work

Euro Tyres Coalville

End-to-end project: branding, design, full site development, and SEO implementation. Created a professional online presence for a local tyre business from scratch.

WordPress Branding SEO Custom Design

Live Site

Open Source

Next.js Dashboard Starter

A clean, secure, and scalable dashboard template built with modern technologies. Designed as a foundation for SaaS apps, CRMs, admin dashboards, or internal tools.

Next.js 14 Prisma 7 NextAuth PostgreSQL

GitHub

Personal Project

3D Browser FPS Game

A fully functional 3D first-person shooter developed entirely for the web using THREE.js. Features immersive graphics and smooth gameplay, all built from scratch to run in the browser.

THREE.js JavaScript WebGL HTML/CSS

Watch Demo