Browse QA Skills

Testing and monitoring Core Web Vitals (LCP, FID, CLS, INP, TTFB) to ensure web performance meets Google search ranking thresholds.

Test fixture design patterns including builders, factories, object mothers, and fixture management for maintainable test data setup.

Comprehensive SDET interview preparation covering coding challenges, system design for testing, automation framework design, CI/CD pipeline questions, testing strategy discussions, and behavioral interview patterns for QA engineering roles.

Instrument LLM apps with Langfuse tracing, then use traces, scores, and datasets to test in production, run evaluations on real traffic, catch regressions, and close the loop from incident to golden dataset.

Comprehensive Nemo.js test automation skill for PayPal's Selenium-based Node.js testing framework featuring view-driven locators, flexible configuration, Mocha integration, and scalable browser automation patterns.

Testing Server-Sent Events implementations including event stream validation, reconnection behavior, event ID tracking, and EventSource client testing.

Designing scalable test architectures including test pyramid, diamond, trophy, and honeycomb patterns with framework-agnostic implementation.

Component testing patterns with Cypress v14 including React, Vue, and Angular component mounting, custom mount commands, interaction testing, visual snapshots, and integration with Vite and Webpack bundlers.

Content Security Policy testing and validation to prevent XSS attacks, data injection, and clickjacking through proper CSP header configuration.

Comprehensive WCAG compliance and accessibility testing covering ARIA, keyboard navigation, screen readers, color contrast, and automated a11y validation.

Testing Docker containers and images including Dockerfile linting, container structure tests, security scanning, and multi-stage build validation.

Catch UI regressions with Percy visual testing, snapshot strategy, Playwright and Cypress integration, responsive widths, dynamic-content stabilization, review workflow discipline, and CI gating without approval fatigue.

Testing database migration scripts for correctness, rollback safety, data integrity, and zero-downtime migration patterns.

Contract testing for GraphQL APIs including schema breaking change detection, query compatibility testing, and federated schema validation.

Validating A/B test implementations including traffic splitting accuracy, statistical significance calculation, metric tracking, and experiment cleanup.

Creates clear, practical QA test plans for feature, module, or release validation.

Managing test environments including provisioning, configuration, data seeding, isolation, cleanup, and environment-as-code patterns.

Generate STAR stories, practice questions, and talking points from resume

Python-based load testing with Locust for writing user behavior scripts, distributed testing, real-time web UI monitoring, and custom load shapes.