Garment Inventory Management

Served as Technical Project Consultant for a medium-scale garment inventory system deployed in client's retailers and warehouses. Led requirements analysis, sprint planning, technical architecture, team coordination, and code quality assurance, including the development of a secure custom kiosk OS for store terminals.

Key Responsibilities:

• Translated client requirements into technical specifications and managed sprint execution.
• Designed database schema, enforced strict typing (zero any usage), and maintained code quality via reviews and Git hooks.
• Established CI/CD pipelines for automated testing and deployment.
• Developed a immutable kiosk OS with encrypted storage, BIOS-level passwords, and no local data persistence to prevent tampering.

Features:

• User, retailer, product, and bundle CRUD operations.
• Retailer-specific transactions with barcode scanning and dynamic price adjustment.
• Automatic bundle detection and low-stock notifications.
• Sales trend analysis and database archiving for performance.

Technology Stack:

• Development Tools
  • Dev Containers: Provides a consistent and isolated development environment.
  • Bun: Supercharged runtime environment.
  • Biome: All-in-one development toolchain such as analyzer, formatter, and linter.
  • Scalar: API documentation that automatically generated by Elysia Swagger plugin.
  • Lefthook: Runs Git hooks for code quality checks and enforces commit message conventions before CI/CD verification.
  • SonarQube: Code quality and security analysis tool to identify code smells, vulnerabilities, and bugs.
  • Renovate: Automates dependency updates for packages, Dev Containers, and Forgejo Actions.
  • Forgejo Actions: CI/CD for code quality and automated deployment process.
• Backend
  • Elysia: Top-performing TypeScript framework that offers E2E type safety, unified type system, and removes validation boilerplate.
  • Drizzle ORM: ORM tool for simplifying database operations and supercharge query speed.
  • PostgreSQL: Hosted on Aiven, providing a cheaper cost as data grows.
  • Native Web Push: Utilized for real-time notifications.
  • Turnstile: Integrated for bot protection and security.
• Frontend
  • Next.js: React framework that seamlessly integrated with Elysia with minimal setup.
  • Zustand: Lightweight and powerful state management compared to Redux.
  • Shadcn: A collection of reusable components.
  • Tanstack: Minimize boilerplates such as virtualization, table, and query.
  • Valibot: A shared schemas between backend and frontend for validation and type inference.
• Kiosk OS
  • Base OS: Custom immutable image built on Universal Blue with full-disk encryption.
  • Lockdown: Enforced kiosk mode with full-screen application access and restricted system functions.
  • Hardware Security: Configured BIOS passwords and disabled boot modifications to prevent unauthorized access.
  • Stateless Design: No persistent user data; system resets to a secure baseline on reboot to mitigate tampering.