AxeTos (ContextQA)
Engineering Overview
AxeTos (part of the ContextQA suite) is a comprehensive solution for web accessibility. It combines a powerful Chrome extension with a dedicated Node.js backend to audit websites against WCAG A, AA, and AAA standards. Beyond just identifying issues, it offers an 'instant fix' capability via script injection.
The Problem
Web accessibility (WCAG) compliance is a critical but often manual and neglected process. Identifying and fixing thousands of accessibility violations across large-scale sites creates a significant developmental bottleneck.
The Solution
Comprehensive auditing suite that runs detailed WCAG A/AA/AAA diagnostics. It features a unique remediation engine that applies persistent fixes via script injection, allowing for 'zero-code' accessibility fixes.
Key Engineering Challenges
Building a non-destructive DOM manipulation engine that reliably applies accessibility fixes (contrast adjustments, ARIA role remediation) across varied third-party frameworks without interfering with existing site logic. Shipped in production during my first 2-3 months at ContextQA.
Core Capabilities
System Architecture
System Architecture
Frontend (Extension)
Backend (Service)
Infrastructure
"A comprehensive auditing and remediation suite that identifies accessibility violations and generates persistent fixes."