Work · Vodafone

Digital Label

Price tag and campaign content for in-store devices

Overview

Digital Label is the backend and admin panel that feed price tags to the phones and tablets on display in stores: device models and variants, installment plans, campaigns, gifts and lock-screen content. I built the first version end to end with Next.js and TypeScript, then migrated the backend to Java 21 / Spring Boot 3 with a teammate.

The problem

Price and campaign information on in-store devices has to stay consistent across regions and stores, with approvals and an audit trail.

Key features

• Catalog of categories, brands, models, variants, devices and installment plans
• Approval workflows for variants and installments; price-change log
• Campaigns, gifts, lock-screen and transition-screen management
• Region, directorate and store hierarchy
• Device endpoints for registration, heartbeat, version checks and logs, feeding an online/offline report
• Excel import with preview and approve/reject, plus export
• LDAP sign-in with role and permission management

Architecture

• First version: Next.js API routes with TypeORM on PostgreSQL and a Next.js admin panel
• Second version: Java 21 / Spring Boot 3 split into an admin API and a mobile API
• JWT and LDAP authentication; S3-compatible storage behind a CDN
• Docker images deployed through a CI/CD pipeline

Technical challenges

• Rewriting the backend in Java while keeping the response format the in-store devices expect
• Meeting an 80% unit-test coverage requirement on the new backend

Tech stack