Available for Remote Work · Davao City, Philippines

Full-Cycle
E-Commerce
Architect

Engineering-minded systems builder with 7+ years delivering real results for US-based clients — from Shopify development and Amazon FBA operations to AI-powered automation and data intelligence.

7+
Years of Experience
$14K
Revenue Recovered
900+
SKUs Managed Daily
$1K+
Monthly Savings

Technical Gatekeeper & Systems Builder

I treat every client's business as my own. My goal is to be a long-term partner who delivers through detailed daily updates, proactive problem-solving, and a zero-error standard across every project I touch. I don't just execute tasks — I build systems that keep running without you needing to manage me.

Location: Davao City, Philippines
Email: johnluthermascarinas51@gmail.com
WhatsApp: +63 994 488 2785
Hours: 40–60 hrs/week incl. weekends
Internet: 100+ Mbps Fiber + Backup ISP
Core Competencies

What I Do Best

Six areas where I consistently deliver measurable results for US-based clients across e-commerce, operations, and technical systems.

🛒
Shopify Theme Engineering

Expert-level Liquid programming, custom section development, Metafields and Metaobjects architecture, and Shopify CLI optimization for enterprise brand lines like Richardson and Sport-Tek.

LiquidGraphQL APIShopify CLINode.js
⚙️
API & Data Automation

Built Node.js automation scripts syncing thousands of product variants and images via Shopify GraphQL. Proficient in SoapUI and XML for large-scale product data extraction pipelines.

Node.jsSoapUIXMLZapier
📊
Data & Pricing Intelligence

Created Power BI dashboards and pricing engines using DAX and weighted averages to surface revenue corrections and protect margins across 900+ SKU product catalogs.

Power BIDAXGoogle SheetsAmazon
🎯
QA & Technical Gatekeeping

Final sign-off authority for multi-channel ad campaigns. Zero-error delivery standard enforced across GoHighLevel workflows, Jira audit tickets, and full conversion funnels.

GoHighLevelJiraGitQA Systems
🗺️
Technical Project Management

Systems audits that eliminate technical waste, scaling roadmaps for growth, SOP documentation, and cross-functional team coordination across Design, SEO, and IT departments.

SOPsRoadmappingClickUpOdoo ERP
🎬
Content & Creative Production

AI-powered video production pipelines, social media management across multiple platforms, landing page builds, and brand asset creation using modern creative tools.

CapCutCanvaPhotoshopWordPress
Work History

US Client Experience

Delivering measurable, documented results for American businesses — fully remote, always available.

🛍️
M-Star Apparel — Morningstar Shirts
E-Commerce Systems & Automation Specialist
📅 2026 – Present
  • Used SoapUI and XML to programmatically extract detailed product specifications and tiered pricing from supplier databases
  • Developed Node.js automation scripts synchronizing thousands of product variants and high-resolution images via Shopify GraphQL API
  • Engineered custom Liquid logic for multi-tone color swatches, dynamic variant-image pairing, and a three-tier CDN fallback swatch system
🔍
Lynx Software
QA Ads Manager & Technical Gatekeeper
📅 January 2025 – Present
  • Served as final sign-off authority for multi-channel ad campaigns, ensuring 100% accuracy in GoHighLevel workflows, forms, and naming conventions
  • Managed Jira technical audit tickets for the Barbae campaign, catching errors in ad creative setup and funnel logic before client delivery
  • Coordinated Design, SEO, and IT teams to identify and resolve technical leaks in conversion funnels — communicated through Slack with specific fix requirements
🌮
Trippy Tacos — Silver Spring, Maryland
Technical Project Manager & IT Administrator
📅 September 2022 – Present
  • Orchestrated a full systems audit eliminating technical waste and saving over $1,000 per month in unnecessary software subscriptions
  • Designed the complete technical roadmap for scaling from a single food truck to a multi-truck, multi-branch operation
  • Rebuilt high-conversion catering landing pages with social proof integration, mobile-responsive design, and Google Ads conversion tracking
  • Configured full Odoo ERP system covering email routing, CRM pipeline, calendar integration, and invoicing automation
📦
ServertechSolutions Inc.
Senior E-Commerce Pricing & FBA Specialist
📅 November 2024 – Present
  • Developed a Power BI Pricing Intelligence Engine using weighted averages that identified $14,000 in potential revenue corrections
  • Managed daily pricing strategy for 900+ enterprise hardware SKUs using a $10-gap competitive method to protect margins while maintaining volume
  • Reconciled a 2,500+ unit inventory discrepancy between warehouse software and Amazon Seller Central, restoring accurate physical valuation
  • Corrected a 2,000-unit over-forecast to 35 units based on 90-day run rates — saving thousands in unnecessary Amazon FBA storage fees
Measurable Impact

Results That Speak
for Themselves

Every number below is a documented result from real client work — not estimates.

$14K
Revenue Corrections Identified

Power BI Pricing Intelligence Engine surfaced $14,000 in recoverable revenue at ServertechSolutions through weighted pricing analysis.

$1K+
Monthly Cost Savings

Systems audit at Trippy Tacos eliminated unnecessary software subscriptions — saving over $1,000 every single month.

900+
SKUs Managed Daily

Real-time pricing and inventory management across 900+ enterprise hardware SKUs on Amazon Seller Central.

2,500
Unit Discrepancy Resolved

Reconciled a massive inventory gap between warehouse software and Amazon Seller Central, restoring accurate physical valuation.

7+
New Launch Opportunities

Identified 7+ new Amazon product launch opportunities by auditing dormant warehouse stock for ServertechSolutions.

100%
Zero-Error Delivery

Maintained perfect zero-error delivery as final QA gatekeeper across all multi-channel campaigns at Lynx Software.

Tech Stack

Tools I Use Every Day

A practical, battle-tested toolkit built through real client work — not theoretical knowledge.

Development & E-Commerce
🟢 Shopify
🔷 WordPress
📗 Node.js
🔗 GraphQL API
🧪 SoapUI / XML
🐙 Git / GitHub
💻 HTML / CSS
🐍 Python
Data, Analytics & Amazon
📊 Power BI (DAX)
📋 Google Sheets
📦 Amazon Seller Central
🏪 eBay
📈 Finale Inventory
🤖 SellerAmp
📣 Google Ads
Automation, CRM & Project Management
🎯 GoHighLevel
🔁 Zapier
💼 HubSpot
🐛 Jira
💬 Slack
🗂️ Trello
ClickUp
🧠 Odoo ERP
Creative, AI & Content
🎬 CapCut
🎨 Canva
🖼️ Photoshop
🤖 Claude AI
🎙️ ElevenLabs
🎥 HeyGen
🖥️ Pictory AI
Why Choose Me

Remote Reliability
You Can Count On

🌐
Rock-Solid Infrastructure

Dedicated home office with 100+ Mbps Fiber Internet and a secondary backup ISP plus UPS power supply — guaranteeing 100% uptime during your business hours.

🤝
True Ownership Mindset

I treat your business as my own. Long-term partnership, detailed EOD reports, proactive problem-solving — not just task execution. I flag issues before you notice them.

⏱️
Maximum Availability

Committed to 40–60 hours per week including weekends. I check and update work daily — not just during business hours — because your business never stops.

Get In Touch

Let's Work Together

I'm actively seeking remote roles in e-commerce operations, Shopify development, Amazon FBA analysis, project management, and technical VA work. If you need someone who delivers results and treats your business like their own — let's talk.

Ready to Start
Immediately

Available to begin work right away. No delays — I come fully equipped with tools, infrastructure, and experience to hit the ground running from day one.

40–60 hours per week available
Weekends included — always on
US, AU, and EU time zones
100+ Mbps Fiber + backup ISP
Daily EOD reports & updates
Immediate start date
📩 Email Me Now