John Mark G.

HI, I'M JOHN MARK

based in Barcelona, Sorsogon, Philippines.

Since 2015, I've been building for the web - custom Shopify themes and apps, full-stack sites, and mobile apps for clients around the world. Every project ships tested, polished, and ready to grow with your business.

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See What I Can Do
my services

How I can help your next project

What I Do?

01

Web Development

  • Responsive Websites
  • Full-Stack Apps
  • API Integration
  • Performance Optimization
  • Bug Fixing & Testing

02

Shopify Theme Development

  • Custom Theme Design
  • Liquid Development
  • Theme Customization
  • Speed Optimization
  • Section & Block Building

03

Shopify App Development

  • Custom App Development
  • Shopify API Integration
  • Webhook Automation
  • Admin & Storefront Extensions
  • App Maintenance & Support

04

AI Automation

  • Workflow Automation
  • Chatbot Integration
  • AI-Powered Tools
  • Process Optimization
  • Custom AI Solutions
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tools

What I build with

Tools I Use

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EXPERIENCES

Highlight My key Experiences

My Experience

(2025 - Present)

Shopify Developer at True Color Wholesale:

Delivering ongoing Shopify storefront development for True Color Wholesale, along with internal accounting tools and AI automation that streamlines order management.

(2024 - 2025)

Full-Time Shopify App Developer at Nordlytica:

Built and maintained custom Shopify apps for Markus Krag's Nordlytica, including a Sweden-based Shopify store and a startup web application connecting sport teams with sponsorship opportunities, through recurring standups over a 15-month engagement.

(2023)

Web Developer at Ghonda Legacy Investments, LLC:

Delivered web development work on the SocksRock project for Napo Ghonda, joining after a signed offer in November 2023 and wrapping up the engagement later that same year.

(2022 - Present)

Full-Time Web Developer at Ari Bikes (formerly Fezzari Bicycles):

My longest-running engagement — bike builder tools, Bread Pay, and Klaviyo integrations for fezzari.com, carried through the 2024 rebrand to Ari Bikes and onto Shopify Plus.

(2022)

Shopify Developer at Aesymmetric:

Built Shopify storefronts for agency clients including Fyrn, Oak Furniture Superstore, and Tori Belle as part of Alex Espinoza's Aesymmetric team.

(2020 - Present)

Full-Time Faculty (Instructor 1) at Sorsogon State University:

Teaching Application Development and Enterprise Application in the BS Information System program under the College of Information and Communication Technologies since August 10, 2020. Also build internal tools for the university, including a Document Tracking System and a campus library attendance monitoring system, and take part in extension work with partner agencies.

(2020)

Part-Time Web Developer, Early Freelance Roles:

Started freelancing through OnlineJobs.ph with part-time roles for hijoey, Lara, and Equipt Media, building the foundation for a full-time development career.

(2015 - 2020)

Full-Time Instructor at ACLC College Sorsogon:

Taught Web Programming, C++ & Java Programming, Database Management, and Data Structures & Algorithms across multiple semesters, earning a Very Satisfactory performance rating.
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projects

Some of my most recent projects

My Featured Projects

TechShop

E-commerce Platform

design - frontend - backend

Edumaster

Online Learning Platform

design - frontend - backend

QuickBite

Food Delivery Mobile App

ui/ux design - mobile development
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contact

Let's get in touch

Contact me

+63 956 933 5623

contact@jmgabrentina.com

Barcelona, Sorsogon, Philippines

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