Joyzone Electronics
High-performance hardware marketplace & 10-module admin control panel.
The System Bottleneck & Problem Statement
Electronic hardware shoppers in Indonesia regularly struggled with incorrect delivery addresses resulting in expensive shipping returns, while store administrators lacked a consolidated control room to manage inventory, flash sales, and order auditing.
Architected Solution & Execution Mechanics
Engineered a unified e-commerce system featuring an automated 5-step checkout with real-time geocoding address validation, alongside a powerful 10-module administrative dashboard for orders, catalog CRUD, flash sales, and financial audits.
Storefront Client
Ultra-responsive product catalog and 5-step checkout pipeline.
Core Architecture Implementation
Production-grade architecture implementation powering Joyzone Electronics:
// 5-Step Transactional Checkout Pipeline & Geocoding Validator
export type CheckoutStep = 'IDENTITY' | 'OTP_VERIFY' | 'ADDRESS_GEOCODE' | 'SHIPPING_RATES' | 'PAYMENT_SETTLE';
export async function validateAddressAndPostal(rawAddress: string, userCoords?: { lat: number; lng: number }) {
const params = new URLSearchParams({
q: rawAddress,
format: 'json',
addressdetails: '1',
limit: '1'
});
const response = await fetch(`https://nominatim.openstreetmap.org/search?${params.toString()}`, {
headers: { 'User-Agent': 'Joyzone-Checkout-Validator/1.0' }
});
const [match] = await response.json();
if (!match || !match.address) {
throw new Error('Alamat tidak terdeteksi. Mohon cek kembali nama jalan dan kelurahan.');
}
return {
formattedAddress: match.display_name,
postalCode: match.address.postcode || null,
city: match.address.city || match.address.county,
province: match.address.state
};
}Key Engineering Responsibilities
Constructed a 5-step transactional checkout pipeline in React 19 & TypeScript with zero client-side validation leaks.
Integrated open-source geocoding APIs for real-time address validation and automated postal code lookup.
Engineered a 10-module Admin Dashboard covering inventory CRUD, flash sales, and balance auditing.
Implemented technical SEO architecture with dynamic XML sitemaps and structured JSON-LD schema across 1,600+ SKUs.
Non-Trivial Trade-Offs & Decisions
Eliminating Shipping Cost Discrepancies on Volumetric Parcels
System Friction: Hardware components vary from tiny IC chips to large enclosures. Naive weight calculations caused couriers to surcharge merchants due to dimensional volume.
Architectural Decision: Engineered an automatic volumetric freight parser `(L × W × H / 6000)` that dynamically compares volumetric versus actual scale weight before querying logistics carrier rates.
Measured Outcome: 100% shipping cost billing accuracy with zero carrier surcharge disputes.