Daniel Wang

Led security improvements by implementing OAuth 2.0 authentication, mitigating over 90% of unauthorized access risk. Identified and remediated critical security flaws via rigorous penetration testing, improved accessibility across the UI, and refactored backend workflows to reduce processing time by 50% while building scalable cloud features with AWS (S3, DynamoDB). Drove feature-flag deployments for faster releases and collaborated with QA and development teams on release validation and post-release testing.

Strengthened SaaS platform security by implementing OAuth 2.0 authentication, mitigating >90% unauthorized access risk; built full-stack backend features and delivered iterative improvements from UI to backend APIs; led accessibility enhancements validated with WCAG 2.1; refactored backend workflows and schema versions, reducing processing time by 50%; built scalable cloud features using AWS S3 and DynamoDB.

Led test automation for enterprise SaaS products across web, mobile, and API platforms. Built and maintained automation frameworks using Selenium, Cypress, WebDriverIO, Jest, and Playwright. Reduced production defects by 90% through automated regression testing; migrated 4000+ legacy Java tests to WebDriverIO and Playwright, cutting CI/CD time from 8 hours to 2 hours. Improved automation stability by logging flaky tests and adding retry coverage; performed cross-browser and mobile testing with BrowserStack and AWS Device Farm. Mentored junior QA engineers and owned QA sign-off for major releases.