Shopify Plus & App Development Services in Vietnam.
Build high-converting, sub-second e-commerce storefronts. From custom Online Store 2.0 themes and headless Hydrogen platforms to enterprise Shopify apps and ERP integrations powering global DTC merchants.
High-converting Shopify architectures built for speed, scale, and profitability.
Modern e-commerce brands in the United States, Australia, and the UK face intense competition where conversion rates correlate directly with performance. Bloated generic themes and dozens of incompatible third-party apps degrade Core Web Vitals, inflating customer acquisition costs.
EFE Technology provides enterprise-grade Shopify engineering. We replace bloated app stacks with streamlined custom theme architectures, bespoke Checkout UI Extensions, and scalable backend microservices that handle viral sales surges without breaking.
As authors of our own published software products in the e-commerce ecosystem, our senior engineers understand the subtleties of Shopify's GraphQL Admin API, webhook rate limits, and Checkout Extensibility better than standard template agencies.
Complete Shopify and Shopify Plus engineering capabilities.
Bespoke Online Store 2.0 Themes
Modular, high-converting Liquid themes built from scratch with zero boilerplate. We eliminate app bloat, optimize rendering paths, and ensure sub-second page loads across mobile and desktop.
Custom & Public Shopify Apps
Enterprise-grade Shopify applications built with modern frameworks. From bespoke private apps automating internal fulfillment to public App Store offerings serving thousands of merchants.
Headless Commerce with Hydrogen
Ultra-fast headless architectures powered by Shopify Hydrogen, Remix, and Next.js. Deployed on global edge CDNs for lightning-fast sub-second transitions and custom brand experiences.
Shopify Plus & Checkout Extensibility
Custom checkout experiences built using Shopify Functions (Rust / WebAssembly) and Checkout UI Extensions. Custom discounts, delivery validation, payment customization, and post-purchase upsells.
Enterprise ERP & Logistics Sync
Resilient bi-directional middleware connecting your Shopify store to SAP, NetSuite, Salesforce, Microsoft Dynamics, Klaviyo, Gorgias, and custom warehouse management systems.
Platform Migrations (Zero SEO Loss)
Flawless re-platforming from Magento, WooCommerce, BigCommerce, or Salesforce Commerce Cloud to Shopify Plus with full historical order migration, customer data encryption, and preserved 301 SEO mappings.
Engineering-first approach to commerce that drives real GMV growth.
Zero-Bloat Engineering
Most Shopify stores suffer from dozens of unoptimized apps injecting bloated scripts. We build native OS 2.0 theme components and unified microservices, restoring peak Core Web Vitals scores.
First-Hand Shopify App Ecosystem Creators
We don't just configure themes; our engineers have built and scaled published Shopify App Store products (like Formpify and VegaApps) serving thousands of global stores. We know every API constraint and rate limit.
Conversion-First Architecture
Speed is revenue. Every 100ms decrease in page load increases conversion rates by up to 7%. Our technical architecture guarantees strict performance budgets, responsive image srcset, and lazy-loading hygiene.
Direct Agile Collaboration
Work directly with senior full-stack Shopify engineers in real-time. Daily standups in English, sprint planning via Jira, and continuous deployment through GitHub Actions to automated staging stores.
Transparent, predictable sprints from discovery to launch.
Discovery & Architecture Blueprint
We audit your existing store, product catalog schema, third-party apps, ERP integrations, and conversion funnels to design a lean technical specification.
UI/UX & Storefront Engineering
High-fidelity Figma designs translated into modular Online Store 2.0 sections with custom schema settings, giving your marketing team complete visual control without code.
App & Middleware Development
Custom backend microservices, GraphQL Admin API queries, webhooks, and third-party integrations developed with automated unit and regression testing.
Rigorous QA & Speed Benchmarking
End-to-end checkout flow validation across multiple currencies, devices, and payment gateways. Comprehensive Lighthouse Core Web Vitals profiling prior to sign-off.
Zero-Downtime Launch & Hypercare
DNS cutover with real-time analytics monitoring, error log tracking, 301 redirect validation, and dedicated 24/7 hypercare support during peak traffic events.
Answers to common questions about our Shopify services.
What makes EFE Technology different from typical Shopify agencies?+
Unlike typical marketing agencies that assemble pre-made themes and stack dozens of paid apps, EFE is an engineering-first development consultancy. We build custom Online Store 2.0 themes, proprietary Shopify apps, and headless Hydrogen architectures with first-class software engineering practices: version control, automated CI/CD staging, and 100/100 Core Web Vitals optimization.
Can you build custom private Shopify apps for our internal business operations?+
Yes. We frequently develop custom private and custom apps to integrate Shopify Plus stores with legacy ERPs (SAP, NetSuite), custom warehouse management systems (WMS), bespoke loyalty engines, and multi-warehouse inventory synchronizers using Shopify's GraphQL Admin API and webhooks.
How do you ensure our SEO rankings are preserved when migrating to Shopify?+
We perform a comprehensive SEO pre-migration audit capturing every existing URL, meta title, description, and canonical tag. During migration, we implement an automated 301 redirect matrix, map schema markup (Product, BreadcrumbList, Organization), and verify indexing continuity in Google Search Console to guarantee zero traffic loss.
Do you support Shopify Checkout Extensibility and Shopify Functions?+
Yes. With Shopify deprecating checkout.liquid, we architect modern checkout customizations using Checkout UI Extensions and high-performance Shopify Functions written in Rust / WebAssembly, enabling custom discount tiers, delivery date pickers, and checkout validation rules.
What is your engagement model for ongoing Shopify maintenance?+
We offer both dedicated offshore squads (monthly full-time engineers) and agile sprint-based retainers for continuous feature development, conversion rate optimization (CRO) A/B testing, theme updates, and high-priority on-call support during Black Friday / Cyber Monday (BFCM) sales events.
Ready to build something exceptional?
Let's discuss how EFE can accelerate your next project. Fill in the form and we'll get back to you within 24 hours.