commerce systems / checkout engines
Shopify App Developer & Full-Stack Architect
I build production-grade Shopify apps, checkout logic, discount systems, and database-heavy commerce workflows for real merchant operations.
operator identity
I work where storefront ambition meets production constraints: checkout rules, discount logic, database-heavy workflows, and app architecture that has to survive real merchant operations.
capability systems
Validation Core
Precise, maintainable checkout rules designed to resist bypasses and keep merchant operations predictable.
Pricing Systems
Custom discount flows, limit rules, promotion logic, and storefront experiences that stay readable as complexity grows.
Embedded Apps
End-to-end app surfaces with secure auth, stable data models, operational admin flows, and clean delivery paths.
Performance
Query tuning, migration planning, and data workflows for commerce systems that need to stay fast under real usage.
Ownership
Shipping discipline across CI/CD, team leadership, launch readiness, monitoring, and long-term maintainability.
source signal matrix
The portfolio keeps the resume details available, but frames them as capability telemetry: where I can design, build, debug, and ship.
selected case files
Merchants needed precise delivery date and time control across blockout dates, lead-time, cutoff rules, and shipping-method-specific schedules.
Designed merchant configuration, Shopify API integration, checkout-facing logic, and production data flows around operational scheduling.
Moved delivery planning from a fragile storefront detail into a checkout system merchants can trust under real constraints.
Purchase restrictions had to enforce min/max quantity, cart totals, and product-specific limits without creating invalid checkout paths.
Built validation boundaries, merchant-facing rule modules, and Shopify Functions enforcement designed around bypass resistance.
Supported precise limit enforcement while keeping the implementation maintainable for product iteration.
Discount requirements grew beyond simple coupons and needed a system that could model nuanced merchant logic.
A layered discount architecture with explicit inputs, clear execution paths, and production-safe configuration.
Created a stronger base for campaign logic, merchant experimentation, and long-term app extensibility.
archive
Tiered buy-more-save-more pricing with product and variant-level rules integrated into the cart experience.
Custom automation engine, UI configuration dashboard, and trigger system that syncs natively with Shopify workflows.
Migration of millions of records with transaction handling, rollback paths, error recovery, and query optimization.
Resolved lock waits, binary log storage pressure, and indexing bottlenecks to reduce critical query latency.
Order and returns management system with real-time messaging and integrations across Amazon SP, Shopify, Stripe, and PayPal.
Marketing campaign infrastructure with REST APIs, seller-creator communication, and Stripe payment flows.
experience
XIPAT Flexible Solutions
WISE Commerce
Hanoi University of Industry