A well-established German engineering firm relied on a decade-old web application built in AngularJS for everything from customer dashboards to internal analytics. With AngularJS reaching end-of-life, they faced security risks, scaling challenges, and slow feature delivery.
They turned to Code Elevator for a complete frontend and partial backend migration, with zero tolerance for downtime or data loss.
- AngularJS was outdated and no longer supported by Google
- New developers struggled to maintain legacy code
- Poor performance on mobile devices and newer browsers
- Client wanted a modern, component-based architecture using Vue.js
- Data-intensive dashboards and custom UI widgets needed to be reengineered
- Code Elevator’s goal: Rebuild the entire frontend using Vue.js while keeping the backend (Node.js and MongoDB) intact, and delivering a smoother, faster user experience.
We built a dedicated migration squad:
- 1 Technical Architect
- 2 Senior Vue.js Developers
- 1 Full-stack Engineer for backend coordination
- 1 QA Automation Specialist
Execution
Phase 1: Codebase Audit & Migration Plan (1 Week)
Audited AngularJS components, routes, services, and directives
Identified reusable logic and legacy technical debt
Created a phased rollout plan with module-by-module migrationPhase 2: Backend API Compatibility Layer (2 Weeks)
Built middleware to ensure old AngularJS and new Vue components could coexist
Added REST API documentation using Swagger to guide frontend rework
Deployed staging environments to validate backward compatibilityPhase 3: UI/UX Modernization with Vue 3 (3 Weeks)
Rebuilt core modules using Vue 3 + Vuex for state management
Integrated Vuetify for a clean, responsive UI
Introduced lazy loading and dynamic imports for performance boostsPhase 4: Testing, QA, and Progressive Launch (2 Weeks)
Used Cypress and Jest for unit and integration testing
Deployed Vue components progressively alongside legacy ones
Final cutover and cleanup after successful parallel validation
We were nervous about migrating such a mission-critical app. Code Elevator not only made it safe—they made it better. The new system feels faster, cleaner, and future-ready.
CIO, German Engineering Company
Results
Frontend Load Time: Reduced by 45%
Component Reusability: Increased by 70% thanks to Vue’s modular architecture
Developer Productivity: New features shipped 40% faster post-migration
Security & Compliance: Fully aligned with modern browser and data safety standards
Downtime: 0 hours during the full 8-week rollout
Tools & Technologies
- Frontend: Vue.js 3, Vuex, Vuetify, TypeScript
- Legacy: AngularJS 1.x
- Backend Compatibility: Node.js, Express, Swagger
- Testing: Cypress, Jest, Selenium for regression
- Deployment: Docker, GitLab CI/CD, AWS S3 + CloudFront
