Integration Architecture: How DEI Hackathon Winners Bridge Legacy Systems with Accessibility

This is part of the Hackathon Raptors Engineering Excellence series, where we share insights from judges and technical leaders to help participants excel.

While many accessibility solutions focus solely on front-end implementations, the most impactful projects from the 2025 AI-Powered DEI Web Accessibility Hackathon tackled a more complex challenge: integrating advanced accessibility features with existing enterprise systems. This integration-focused approach addresses a critical gap in the accessibility ecosystem, providing pathways for organizations to enhance digital inclusion without costly overhauls of established infrastructure.

The Enterprise Integration Challenge

“The most significant barrier to widespread accessibility adoption isn’t technology—it’s integration,” explains Chingiz Mizambekov, healthcare digitalization leader and Lead Functional Analyst at Qframe NV, who served as a judge at the hackathon. “Organizations have invested heavily in their digital infrastructure, and ripping out systems to implement accessibility features simply isn’t feasible. The teams that recognized this reality and designed for seamless integration delivered the most practically valuable solutions.”

Mizambekov, who oversaw the development of Factura, a complex invoicing system for the University Hospital of Antwerp (UZA), brings extensive experience in healthcare systems integration to his evaluation of hackathon projects. His expertise in configuring systems to adapt to evolving regulatory requirements mirrors the challenge of implementing accessibility standards in established enterprise environments.

Technical Integration Patterns

Several winning and category-leading projects demonstrated sophisticated approaches to systems integration. Mizambekov identifies three particularly effective technical patterns:

Non-Invasive DOM Enhancement

The category-winning project ComplyScan implemented what Mizambekov calls a “non-invasive DOM manipulation layer” that enhances accessibility without modifying the underlying application code:

“Their technical approach is particularly impressive because it functions as a transparent middleware layer,” Mizambekov explains. “Rather than requiring changes to the application codebase, ComplyScan intercepts the DOM after rendering but before display, applying accessibility enhancements without affecting the core functionality.”

ComplyScan’s performance testing showed significant processing efficiency across different enhancement types:

Enhancement Type	Processing Time (ms)	DOM Impact (elements)	Memory Overhead (KB)
ARIA Role Addition	4.2	35	12
Focus Management	7.8	22	18
Color Contrast Correction	15.6	47	31
Form Field Labeling	9.3	19	14
Keyboard Navigation	6.1	28	17

This implementation relies on several technical components:

1. DOM Observer Pattern: Monitors rendering events to detect when modifications can be safely applied
2. Semantic Analysis Engine: Identifies structural elements that require accessibility enhancements
3. ARIA Injection System: Dynamically adds appropriate ARIA attributes and roles
4. Verification Loop: Confirms that modifications don’t disrupt existing functionality

“What’s technically impressive is their handling of dynamic content,” Mizambekov notes. “By implementing a persistent observer pattern, they maintain accessibility enhancements even as the application state changes through user interaction.”

API Abstraction Layer

The AccessFlow team addressed the challenge of integrating with diverse backend systems by implementing what Mizambekov describes as an “intelligent API abstraction layer”:

“Their solution demonstrates a sophisticated understanding of integration architecture,” he explains. “Rather than creating point-to-point integrations with specific backend systems, they developed an abstraction layer that normalizes data exchange between accessibility features and various underlying systems.”

The technical implementation includes:

1. API Gateway: Routes requests between accessibility components and backend systems
2. Schema Transformer: Normalizes data structures for consistent accessibility processing
3. Request Orchestrator: Manages asynchronous communication with multiple backend services
4. Caching Mechanism: Reduces backend load by intelligently caching appropriate data

“This approach is particularly valuable in enterprise environments,” Mizambekov notes. “It allows organizations to enhance accessibility without modifying established backend services, significantly reducing implementation friction.”

The AccessFlow team benchmarked their abstraction layer across different backend systems:

Backend System	Connection Type	Response Normalization (ms)	Cache Hit Rate (%)	Throughput (req/s)
Oracle ERP	SOAP API	78	87	245
SAP	REST API	62	92	310
.NET Services	GraphQL	45	89	356
Legacy Java	Custom RPC	112	76	178
Salesforce	REST API	57	91	295

“These metrics demonstrate the abstraction layer’s effectiveness across heterogeneous systems,” Mizambekov explains. “Particularly impressive is the performance with legacy systems, which typically present the greatest integration challenges.”

Event-Driven Adaptation

The DEI Assistant Chrome Extension team implemented an event-driven architecture that Mizambekov identifies as particularly well-suited to enterprise integration:

“Their event-driven approach to accessibility enhancement is technically elegant,” he explains. “By using a publish-subscribe pattern, they’ve created a solution that can adapt to changing application states without tight coupling to specific implementations.”

The technical architecture includes:

1. Event Bus: Central communication channel for accessibility-related events
2. Specialized Listeners: Purpose-built components that respond to specific event types
3. State Management System: Maintains context across the user journey
4. Prioritization Engine: Ensures critical accessibility features receive processing priority

“This event-driven architecture allows for remarkable adaptability,” Mizambekov observes. “Each accessibility component operates independently but coordinates through the event system, creating a solution that can be progressively enhanced without disrupting existing functionality.”

Performance Under Load

Mizambekov highlighted the critical importance of scalability when integrating accessibility features into enterprise applications:

“Integration approaches that work for demos often collapse under enterprise loads,” he explains. “The teams conducted rigorous load testing to validate their integration patterns.”

The performance testing revealed significant differences between integration approaches:

<component id=”integration-chart” />

“The data clearly shows that direct coupling becomes untenable as user load increases,” notes Mizambekov. “Microservices demonstrated the best scaling characteristics, maintaining sub-3-second response times even at 10,000 concurrent users.”

The performance data influenced Mizambekov’s evaluation of project viability:

“Enterprise-grade accessibility solutions must maintain performance under load. The best technical approaches showed linear rather than exponential degradation as user numbers increased.”

Integration Challenges and Solutions

Authentication Systems Integration

“Authentication presents a particular challenge for accessibility tools,” Mizambekov explains. “Enterprise systems often use complex authentication mechanisms that accessibility middleware must navigate.”

VoxSurf implemented a secure delegation mechanism that maintains security while enhancing accessibility:

1. Token Management for secure credential handling
2. Session Maintenance to preserve authenticated state
3. Permission Boundaries limiting features to appropriate contexts
4. Audit Logging for security compliance

“This approach addresses a critical integration challenge,” Mizambekov observes. “It respects existing authentication while making it accessible.”

Microservices Architecture

Accessibility Helper implemented a microservice architecture for selective deployment:

“They decomposed accessibility features into independent services that can be deployed based on specific needs,” Mizambekov explains.

Key components include:

1. Service Registry tracking available accessibility services
2. API Gateway routing requests appropriately
3. Configuration Service managing deployment settings
4. Monitoring System tracking performance metrics

“This architecture allows incremental implementation,” Mizambekov notes. “Organizations can deploy specific services for their most urgent needs, then expand without disrupting existing functionality.”

Database Integration

Browsingforall created a database-agnostic persistence layer with adapters for different technologies:

1. ORM Layer for structured data
2. NoSQL Adapter for document stores
3. Legacy Database Connector for older systems
4. Migration Utility for data transformation

“This database flexibility is crucial for enterprise adoption,” Mizambekov explains. “Many organizations operate multiple database technologies across different business units.”

Enterprise Deployment Considerations

Drawing from his experience implementing Factura for healthcare environments, Mizambekov offers technical considerations for enterprise-ready accessibility solutions:

Configuration Management

“Enterprise environments require flexible configuration,” Mizambekov explains. “AccessFlow’s hierarchical configuration system allows global accessibility policies while enabling department-specific adaptations.”

Their system implements:

1. Policy Inheritance cascading from global to specific contexts
2. Environment Detection adapting to different deployments
3. Feature Toggles for granular control
4. Configuration API for management system integration

Compliance Reporting

ComplyScan’s “compliance evidence engine” addresses regulatory requirements:

“Rather than simply enhancing accessibility, they maintain an audit trail demonstrating compliance,” Mizambekov notes.

The implementation includes:

1. Compliance Snapshots recording accessibility state
2. Gap Analysis identifying improvement areas
3. Remediation Tracking monitoring progress
4. Evidence Repository maintaining documentation

“This compliance focus addresses a critical enterprise need,” Mizambekov explains. “Organizations increasingly face legal requirements for digital accessibility.”

Key Technical Insights

Based on hackathon evaluation and his healthcare integration experience, Mizambekov offers three technical insights:

1. Design for coexistence, not replacement: “The most deployable solutions enhance existing systems rather than requiring their replacement.”
2. Implement progressive enhancement: “Solutions should deliver value incrementally rather than requiring all-or-nothing deployment.”
3. Prioritize operational compatibility: “Align with established operational practices through standard interfaces and protocols.”

Next in the series: “Security Architecture in Accessibility: Balancing Access with Protection”

---

Author’s note: This article is part of Hackathon Raptors’ ongoing series on technical excellence and project evaluation. All technical details referenced are from the official 2025 AI-Powered DEI Web Accessibility Hackathon results.