About

About Philip Diaz

I'm a Shopify developer and CRO specialist based in Cebu City, Philippines. I've been building software since 2003, from desktop business systems to WordPress sites to enterprise Shopify stores.

Today I help Shopify stores whose sales are slow, and new brands that don't know where to start, with a focus on product customizers, custom Shopify apps, conversion optimization and technical SEO.

Philip Diaz, Shopify developer and CRO specialist in Cebu City, Philippines
How I work

Why the client relationship matters to me

I've been building software for over 20 years, and I've spent much of that time as a freelancer. Freelancing taught me things a job description never could: finding work on your own, earning trust from people on the other side of the world, and delivering when there's no team or manager to fall back on.

Along the way I've worked with many kinds of clients. Some projects felt like a true partnership: clear goals, honest communication, and a shared focus on results. Others taught me hard lessons about what happens when expectations aren't aligned, scope keeps shifting, or communication breaks down.

Those experiences shaped how I work today. I value long-term relationships with good clients over one-off jobs, and I know what it takes to build them:

  • Clear scope and expectations agreed before any work starts
  • Regular, honest updates, including when something isn't going to plan
  • Asking the right questions early, so problems are caught before they cost you time or money
  • Treating your store like a business I care about, not just a ticket to close

Two of my Upwork clients, one in the US and one in Australia, have worked with me for over two years and counting.

If you're looking for a developer who will collaborate with you, not just take instructions, I'd like to hear about your project.

Free 30-Minute Call
// my background

20+ years building software

I didn't start with Shopify. I've been building software since 2003, from desktop business systems to WordPress sites to enterprise Shopify stores. That background is why I care about clean data, solid processes and work that lasts.

  1. 2022 – now

    Top Rated Shopify developer on Upwork

    161 Shopify jobs completed, rated 4.9 on Upwork. Theme development in Liquid, headless storefronts with Shopify Hydrogen, custom Shopify apps, Shopify API and backend integrations with Node.js, and front-end work in React, JavaScript and CSS.

  2. 2017 – 2022

    Freelance Shopify & WooCommerce developer (OnlineJobs.ph)

    Worked directly with clients through OnlineJobs.ph on a wide range of WordPress/WooCommerce and Shopify projects: store builds, theme customization, migrations, bug fixes and ongoing maintenance.

  3. 2010 – 2017

    WordPress & WooCommerce developer

    Built custom WordPress themes and plugins and WooCommerce stores using PHP and MySQL, with a focus on front-end work in JavaScript, CSS and HTML.

  4. 2003 – 2010

    Software developer, business systems

    Built inventory, point of sale (POS) and lending systems for businesses using Visual Studio (.NET), Visual Basic 6, ASP.NET and MS SQL Server.

  5. 2002

    BS in Computer Science

    Graduated with a Bachelor of Science in Computer Science from Negros Oriental State University.

BS Computer Science, NORSU 20+ years in software Shopify since 2017 Enterprise brands
Working with me from abroad? Time zones, communication and how we start →
Tech stack

The tools I build with

Deep Shopify expertise, modern front-end skills, and AI-assisted development that helps me deliver faster without cutting corners.

Shopify

Themes, headless storefronts and custom functionality.

Shopify Liquid Shopify Hydrogen Online Store 2.0 Shopify Functions Shopify Flow Shopify Plus Agentic Storefronts Product Taxonomy Store migration Shopify APIs Custom apps Shopify Partner apps Judge.me API
Technical SEO
JSON-LD schema.org Rich Results Merchant Center Storefront API Metafields & metaobjects

Front-end & back-end

Fast, responsive interfaces and the integrations behind them.

JavaScript React Node.js Vercel GitHub CSS HTML Responsive design Accessibility (WCAG)

AI-assisted development

AI tools that speed up building, design, testing and prototyping.

Claude Code Claude Chat Claude Design Claude Artifacts ChatGPT

Also experienced in

From my years before Shopify.

WordPress Custom themes & plugins WooCommerce PHP MySQL Visual Studio (.NET) Visual Basic 6 ASP.NET MS SQL Server POS & inventory systems
Collaboration tools
Google Docs Jira Trello Monday.com ClickUp Slack
Experience

Industries & client-endorsed skills

Industries I've worked with
  • Jewelry
  • Fashion & apparel
  • Home decor
  • Wall art & framing
  • Specialty food
  • Supplements & probiotics
  • Gifts & toys
  • Workwear & safety
  • Tools & hardware
Skills endorsed by clients
  • Conversion Rate Optimization
  • Page Speed Optimization
  • Analytics & Tracking Setup
  • Tracking Pixel
  • Tracking Goals Setup
Let's get started

No detailed brief needed.

Message me on Upwork to arrange a free 30-minute call. If you need an audit, I'll explain the scope and cost first. Implementation is quoted separately.

  1. 1 Your store URL, or just your product if you're starting fresh
  2. 2 Your budget
  3. 3 What's not working, or what you want to build

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Philip DiazAvailable for new projects 4.9·Top Rated on Upwork Free 30-Minute CallFree 30-Min Call

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