Phill Duffy

Full-Stack Developer, with 18+ years experience.

Keynsham, Bristol, UK

Skills

Languages

  • C#
  • TypeScript
  • JavaScript
  • SQL

Backend & Desktop

  • .NET / .NET Framework
  • ASP.NET MVC / Web API
  • Office VSTO
  • OpenXML SDK
  • WPF / WebView2
  • Node.js

Architecture & Testing

  • Clean Architecture
  • DDD
  • xUnit
  • Reqnroll (BDD)
  • Verify
  • ArchUnitNET
  • Stryker

Frontend

  • HTML
  • CSS
  • Vue.js
  • Astro
  • Tailwind
  • Bootstrap

Databases & Cloud

  • SQL Server
  • Entity Framework
  • Firestore
  • Azure
  • GitHub Actions

AI & Tooling

  • Claude Code & AI Agents
  • Semantic Kernel
  • Roslyn Analyzers
  • Rust

Where I work

Kutana+Brochet

https://kutana-brochet.co.uk/

Principal Technical Architect

"Powering the document lifecycle"

Kutana+Brochet Screenshot

Where I worked before

SEOTesting

https://seotesting.com/

Technical Co-Founder

"Grow search traffic through testing & experimentation with SEOTesting"

SEOTesting.com Test Result Screenshot

Projects

PostMaker

https://postmaker.io/

Scale your Social Media Campaigns with PostMaker

PostMaker.io Campaigns Screenshot

Experimental Website

https://experimentalwebsite.com/

Testing with HTML, Sitemaps, JavaScript, AI, CSS and anything that is fun to try

ExperimentalWebsite.com Screenshot

Content Maker

https://contentmaker.io/

Social Media Content Ideas from a URL with Content

ContentMaker.io Screenshot

Books

Pro SharePoint with jQuery

by Phill Duffy

O'Reilly
Pro SharePoint with jQuery Book Cover

Microsoft® SharePoint® 2010: Business Connectivity Services

By Brett Lonsdale Penelope Coventry and Phill Duffy

O'Reilly
Microsoft® SharePoint® 2010: Business Connectivity Services Book Cover