Robust Full-Stack E-commerce Solution

Job Description
We are looking for a highly skilled, senior e-commerce freelancer or agency to build/rebuild a robust full-stack e-commerce application. The platform needs to seamlessly sync with a mobile application and handle advanced B2B wholesale features alongside standard B2C flows.

The ideal candidate will have deep expertise in either Shopify (Plus/Advanced Custom Apps) OR WordPress + WooCommerce, with a proven track record of handling complex inventory synchronization, headless architectures or deep API integrations, and international localization.

Core Project Requirements
1. Platform Architecture & Mobile Support
Build or optimize the desktop/mobile web experience using Shopify or WordPress (WooCommerce).

Implement full mobile app support (either via headless API integration for a hybrid/native app or highly optimized PWA/Web-view deployment).

Ensure absolute data parity across web and mobile touchpoints.

2. Advanced B2B Bulk Ordering (Grid-Based Interface)
Implement a matrix/grid-based bulk ordering system allowing B2B buyers to order multiple variants (sizes, colors, technical specifications) simultaneously from a single view.

Support for wholesale customer roles, tiered pricing, volume discounts, and minimum order quantities (MOQs).

3. Localization & Internationalization (i18n)
Multi-Currency: Dynamic currency switching based on user locale or explicit selection, integrating with reliable payment gateways supporting international checkout.

Multi-Language: Dynamic multi-lingual content delivery across the CMS, product descriptions, and checkout flows.

Localized Sub-domains/Paths: Proper SEO-friendly handling of localized regions.

4. Order & Inventory Management
Centralized system to manage multi-location inventory (if applicable) or real-time sync to prevent overselling.

Automated order routing, status tracking, and structured invoice generation for international B2B clients.

5. Content Management System (CMS)
Clean, modular CMS setup allowing our internal team to easily update landing pages, blogs, and structural banners without touching code.

Technical Skills Required
For Shopify: Expert knowledge of Liquid, Shopify Graphql/REST Admin APIs, Storefront API, and custom app development.

For WordPress: Expert knowledge of PHP, WooCommerce core, REST API, database optimization for large catalogs, and Hook/Filter custom development.

Frontend/Mobile: React, Vue, Flutter, or React Native (depending on your proposed mobile strategy).

Data Management: Experience with web scraping, data migration, or syncing platforms without direct server-side access is a major plus.

DevOps: Solid understanding of CDN setups, caching strategies, and international performance optimization.

Deliverables
Complete, responsive web platform with all features fully integrated.

Mobile application infrastructure / API endpoints operational.

Fully functional grid-based bulk ordering module.

Comprehensive testing across multiple currencies, languages, and checkout flows.

Handover documentation covering architecture and custom code.

How to Apply
Please submit your proposal with:

Platform Recommendation: Briefly state whether you recommend Shopify or WordPress for this specific mix of B2B grid-ordering and multi-currency support, and why.

Relevant Portfolio: Links to previous e-commerce sites you’ve built featuring internationalization (multi-currency/language) or custom B2B functionalities.

Mobile Approach: A brief sentence on how you plan to approach the mobile app support requirement.

Estimated Timeline & Budget Strategy.