Partner
Prevision UG (haftungsbeschränkt)
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Case study06
Komplify Accessibility Compliance Platform
Automated BFSG and WCAG 2.2 AA testing with multi-level website scans, actionable findings and documented reports
Compliance & AccessibilityPrevision UG (haftungsbeschränkt)
Industry
Compliance & Accessibility
Core technologies
Next.js · axe-core · AWS
Project work
From requirements to a resilient solution.
A concise look at the context, implementation and technical decisions behind the project.
Starting point
DuoByte built Komplify for Prevision UG as a bilingual SaaS platform that automatically tests websites against Germany’s BFSG accessibility requirements and WCAG 2.2 AA. Businesses can assess a single page without registration or manage multiple domains in a protected dashboard and launch Light, Normal and Deep scans up to full-site crawls.
Implementation
The audit engine combines Puppeteer and axe-core with custom heuristic, behavioral and cross-page checks for contrast, alternative text, keyboard access, focus order, form labels and semantic structure. Findings are organized by impact and confidence, then enriched with actionable remediation guidance, code examples, a manual WCAG checklist, AI-assisted fix suggestions and score trends.
Quality & operations
Scheduled rescans, threshold notifications, scan comparisons and PDF, CSV and BFSG reports make changes traceable and support an ongoing compliance workflow. An AWS architecture based on Lambda, Step Functions, S3, CloudFront, Cognito, SES and PostgreSQL is provisioned with AWS CDK and delivered through GitHub Actions, while Stripe handles subscription and credit billing.
System architecture
A technical foundation with a clear structure.
Technologies were combined to suit the task, operating model and long-term maintainability.
Frontend
Next.js 16React 19TypeScriptTailwind CSSSWR
Backend
Fastify 5TypeScriptPrismaZodREST API
Database
PostgreSQL 16
Audit Engine
Puppeteeraxe-coreWCAG 2.2 AAHeuristic & Behavioral Checks
AI & Analytics
AWS BedrockAI-assisted Fix Suggestions
Integrations
Amazon CognitoAmazon SES
Payments
Stripe BillingCustomer PortalWebhooks
Cloud
AWS LambdaStep FunctionsS3CloudFrontAPI Gateway
Infrastructure
AWS CDKGitHub ActionsCloudWatchAWS WAF
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