const matheus: ShopifyDeveloper = {
role: "Shopify & Shopify Plus Developer",
focus: ["CRO", "Speed", "Shopify SEO",
"Integrations", "Migrations"],
experience: "6+ years, 10+ countries",
result: "+74% sales for a NY retailer",
merchant: "$120K+ store built from scratch",
now: "Scale Army (Remote, US hours)",
mindset: "engineering measured in revenue",
};I'm a Shopify Developer and Shopify Plus expert. For more than six years I've built, fixed and scaled Shopify stores for brands in 10+ countries, usually as the sole technical owner, working remotely with US teams.
I sit where engineering meets revenue. I write the Liquid, wire up the integrations and keep the catalog clean, but I measure the work in sessions, conversion rate and sales. I've also been the merchant: I scaled my own Shopify store from zero to $120,000+ in gross sales, owning development, paid traffic and operations end to end.
| 🧩 | Focus | Details |
|---|---|---|
| 🎨 | Shopify & Shopify Plus Development | Custom themes, sections and blocks in Liquid, JavaScript, HTML and CSS (OS 2.0, metaobjects) |
| 📈 | CRO, Speed & Shopify SEO | Conversion rate optimization, Core Web Vitals and technical SEO that move sessions and sales |
| 🔗 | Integrations | Klaviyo, Bazaarvoice, Contentsquare, Tidio, GA4, Microsoft Clarity and custom API work |
| 🚚 | Migrations & Payments | Platform migrations to Shopify, Shopify Payments rollouts, multi-location inventory |
| 📦 | Catalog & Operations | Inventory and product data synced across 7+ sales channels with Python and Matrixify |
| 📧 | Klaviyo & Paid Traffic | Email/SMS flows and segmentation, plus Google Ads and Meta Ads |
| 🤖 | AI for Commerce | AI support agents, knowledge base curation and LLM-powered commerce tooling |
Commerce & Platform
Languages
Frameworks & Runtime
Data & Cloud
Tooling
| 📈 Client Sales | 🚀 Client Sessions | 💰 Own Store | 🌍 Reach |
|---|---|---|---|
| +74% total sales | +455% sessions | $120K+ gross sales | 10+ countries |
- 📈 Grew a New York fashion retailer's store by +455% sessions, +114% orders and +74% total sales through Shopify SEO, site speed, merchandising and integrations
- 🏆 Scaled a store from scratch to $120,000+ in gross sales (~300K sessions, 1,900+ orders), owning development, paid traffic and operations
- 💳 Led a Shopify Plus brand's migration of card processing to Shopify Payments
- ⭐ Fixed a broken legacy reviews integration that was hiding ratings on more than half of the reviewed catalog
- 🔄 Keep inventory and product data in sync across 7+ sales channels with Python automation and Matrixify
- 🏢 Founded NEX Agency, a Shopify agency serving clients in the US, Canada, Europe and Latin America
- 🍎 Swift Student Challenge 2026 Winner (Apple) · B.S. in Software Engineering, Universidade São Francisco
| Project | What it is | Stack |
|---|---|---|
| venna-shopify-theme | Shopify OS 2.0 theme with reusable sections, blocks and Shopify CLI workflow | Liquid · JS · CSS |
| martina4shop-theme | Production theme behind Martin4Shop, the store I scaled to $120K+ | Liquid · JS · CSS |
| martin-autofulfill | Shopify order fulfillment automation across Shopify and Shopee: orders, addresses, tracking | Python · Streamlit · Playwright |
| ehr-integration | Internal tool that maps and submits data to multiple EHR systems, with API and architecture docs | TypeScript · Node.js |
| podium-app | Spatial canvas to orchestrate AI coding agents, the tooling I use to ship faster | Tauri · React · Rust |
| abrahao-labs-chatbot | RAG chatbot for marketing support, the same idea behind AI support agents for stores | Python · LangChain |
$ matheus --principles
> Own the store end to end.
> Ship for real outcomes:
conversion · revenue · retention.
> Build code that survives
the next campaign.
> Structure & accountability (EOS).
> Async. Remote. US hours. On time.If you're building on Shopify, need a faster, higher-converting store or a clean migration, let's talk.
