Mobile & Cloud Platform

TrustMark

An all-in-one mobile product cataloging, inventory tracking, and QR code authentication platform built with React Native (Expo) and a Spring Boot backend.

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Project Overview

Developed for NTU's Mobile & Ubiquitous Applications Development module (IN6222), TrustMark modernizes product inventory and brand protection for SMEs. The platform enables creators to manage multi-tiered product catalogs and collections, generate per-item unique QR code certificates for instant authenticity verification, track real-time stock levels, and orchestrate order shipping workflows through an intuitive mobile interface.

Key Architecture & Contributions

Architected a cross-platform mobile application using React Native and Expo Router with modular screen flows (Collections, Shipping, QR Authenticity).
Engineered a Spring Boot REST API backend with Spring Data JPA and MySQL for brand, collection, and product item persistence.
Implemented an automated QR certificate lifecycle protocol generating unique item-level serials for instant authenticity verification.
Built real-time stock visibility tracking (In Stock, Low Stock, Out of Stock) based on produced vs remaining inventory ratios.
Created order fulfillment and shipping progress simulation flows with batch dispatching for in-stock inventory.
Containerized the multi-service architecture (Spring Boot backend and MySQL database) using Docker and Docker Compose.

AuthCheckScreen.tsx

Source Preview

export const verifyProductCertificate = async (qrPayload: string) => {
  const serial = normalizeQrCertificate(qrPayload);
  const { data } = await apiClient.get(`/api/v1/products/verify/${serial}`);

  if (data.status === "ACTIVE") {
    return {
      authentic: true,
      productName: data.productName,
      stockStatus: data.stockStatus, // In Stock, Low Stock, Out of Stock
      certificateUrl: data.certificateQrUrl,
    };
  }

  return { authentic: false, message: "Invalid or revoked certificate" };
};