The Challenge
When we first engaged with this federal agency, they were running on a 20-year-old COBOL system that was becoming increasingly difficult to maintain. The system was slow, inaccessible to users with disabilities, and posed significant security risks. The agency needed a complete digital transformation while maintaining zero downtime and ensuring compliance with federal accessibility standards.
Our Approach
We implemented a phased migration strategy using modern cloud-native technologies. Here's the architecture we designed:
System Architecture
Key Technologies
We chose Laravel for the backend API due to its robust security features and built-in accessibility support. For the frontend, we used React with TypeScript to ensure type safety and better maintainability.
Laravel Security Configuration
return [
'cors' => [
'allowed_origins' => [env('FRONTEND_URL')],
'allowed_methods' => ['GET', 'POST', 'PUT', 'DELETE'],
'allowed_headers' => ['Content-Type', 'Authorization'],
],
'rate_limiting' => [
'api' => '100/minute',
'auth' => '5/minute',
],
'encryption' => [
'key' => env('APP_KEY'),
'cipher' => 'AES-256-CBC',
],
];
Accessibility Implementation
Ensuring WCAG 2.1 AA compliance was a top priority. We implemented comprehensive accessibility features:
- Semantic HTML structure with proper ARIA labels
- Keyboard navigation support for all interactive elements
- Screen reader compatibility with descriptive alt text
- High contrast mode support
- Focus management for single-page applications
Accessibility Testing Script
class AccessibilityTest extends TestCase
{
public function test_wcag_compliance()
{
$response = $this->get('/citizen-portal');
// Test color contrast ratio
$this->assertColorContrast($response, 4.5);
// Test keyboard navigation
$this->assertKeyboardNavigation($response);
// Test screen reader compatibility
$this->assertScreenReaderCompatible($response);
}
}
Results
The transformation was a complete success. We achieved:
- 99.9% uptime during the migration process
- 300% faster page load times
- 100% WCAG 2.1 AA compliance across all citizen-facing applications
- Zero security incidents since deployment
- 85% reduction in maintenance costs
Lessons Learned
This project taught us the importance of thorough planning when dealing with legacy systems. The key to success was maintaining backward compatibility while gradually introducing modern features. We also learned that accessibility isn't just a compliance requirement—it's a fundamental aspect of good user experience that benefits all users.