Open To Work
Sean Connolly Software Developer
I build fast, accessible interfaces and the systems that run behind them.
Full-stack developer • 30+ production sites
PHP • SQL • Laravel • React • TypeScript • JavaScript
Performance, accessibility and technical SEO focus
UK • Open to remote/hybrid/relocation
About Me
I’m a full-stack developer who builds web applications that load fast, stay stable, and hold up in production. Four years of agency experience across 30+ live sites has taught me to own work end-to-end. From Figma handoff through to deployment, monitoring and the maintenance cycle nobody enjoys but everyone needs.
Most of my work sits at the boundary between interface and infrastructure. I care about the details users feel: how quickly a page paints, whether it works with a keyboard, whether the data on screen is actually legible. I care equally about what sits behind it; typed code, tested code, and deployments that don’t require someone awake at 2am.
Recent work: Architected a multi-branch Laravel management platform with three-tier RBAC and a 40+ test Pest suite, and deployed it to a hardened Linux VPS. Led security incident response across five client sites, cutting remediation from days to hours. Moved Core Web Vitals from red to green on sites averaging 50k monthly visitors.
Key Highlights
- First Class BSc Computer Science (76%) — dissertation in conversational AI, graded A+
- #1 design award for university capstone project
- 30+ production sites delivered across four years of agency work
- Built and shipped a full Laravel platform solo; architecture, tests, deployment, hardening
- Performance and accessibility specialist; Core Web Vitals, WCAG, technical SEO
Skills & Expertise
Core Engineering
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TypeScript
JavaScript (ES6+)
PHP
SQL
HTML5
Python
Lua
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React
Next.js
Node.js
Laravel
WordPress
Three.js / WebGL
Tailwind CSS
Vite
Prisma
Figma
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Pest / PHPUnit
Vitest / Jest
PHPStan
WCAG / Accessibility Testing
Core Web Vitals (LCP/CLS/INP)
Cross-browser & Device Testing
Chrome DevTools
Postman
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Git (GitHub, Bitbucket)
GitHub Actions CI/CD
Docker
Linux
Nginx
MySQL
PostgreSQL
Cloudflare
VPS Provisioning & Hardening
cPanel & Hosting Management
Agency Specialism
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Custom Theme Development
Custom Plugins
Gutenberg Block Development
ACF Pro
Hooks (Actions & Filters)
Custom Post Types & Taxonomies
Template Hierarchy
WordPress REST API
WP-CLI
Headless WordPress
Elementor
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Core Web Vitals Remediation
Responsive Images (srcset, lazy loading, fetchpriority)
Asset Optimisation (WebP/AVIF)
Script Optimisation (Defer/Delay/Unload)
Caching Strategy
Technical & On-Page SEO
Schema Markup
Structured Content & Internal Linking
Redirects & Broken Link Remediation
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WooCommerce Configuration
Product & Category Architecture
Checkout UX Improvements
Payments Troubleshooting
Shipping & Tax Rules
Third-Party API Integration
REST API Design
Webhooks
Authentication (OAuth/JWT)
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Role-Based Access Control
Two-Factor Authentication
Audit Logging
Server Hardening (UFW, fail2ban)
SSL/TLS & Cloudflare Strict
Incident Response & Vulnerability Triage
Updates, Patching & Backups
Cookie & Consent Compliance (UK/EU)
Core Strengths
Problem Solving & Debugging
Adaptable & Solution-Driven
Systems Thinking
Stakeholder Communication
Technical SEO Strategy
Featured Projects
Garage Management Platform
Full-Stack Build
Multi-branch management system built end-to-end in Laravel. Three-tier role-based access control, 2FA, audit logging, PDF invoicing and branch-scoped reporting. Deployed to a hardened Linux VPS with Nginx, Cloudflare Strict SSL and GitHub Actions CI/CD, backed by a 40+ test Pest suite.
Laravel
MySQL
Pest
Nginx
CI/CD
Private system
Next.js Dashboard Starter
Open Source
A secure, typed foundation for SaaS apps, CRMs and internal tools. Authentication, database layer and dashboard scaffolding ready to build on.
Next.js
TypeScript
Prisma
NextAuth
PostgreSQL
GitHub
3D Browser FPS
Personal Project
A fully playable first-person shooter written from scratch; rendering pipeline, movement, game loop and collision detection, all running in the browser with no engine.
Three.js
WebGL
JavaScript
Blender
Watch Demo
Euro Tyres Coalville
Website & Branding
End-to-end delivery for a local tyre business: branding, design, build and technical SEO.
WordPress
Branding
SEO
View Website
