Shipping Container Tracker

Overview

A Java CLI-based back-end application that tracks shipping containers and their contents using RFID-style identifiers. I built this project to practice clean domain modeling, validation, and designing workflows that prevent invalid system states.

What I built

• A shipment and container domain model with clear ownership rules and state transitions
• Validation logic to prevent invalid container states and inconsistent updates
• A command-driven CLI workflow for querying and updating container data

Design notes

• Explicit domain boundaries: kept business rules inside domain models instead of scattering logic across commands.
• Validation as core behavior: treated correctness checks as first-class features, not defensive afterthoughts.
• Simplicity over abstraction: optimized for clarity and extension rather than over-engineered patterns.