Andrew Johnson

About Andrew Johnson

Senior Software Engineer with over 10 years of experience building scalable…

Experience

1. Senior Software Engineer

   Highmark Health

   Mar 2022 — Present

   Delivered seamless cross-platform experiences for My Highmark using React, Next.js, TypeScript, Java, and Spring Boot, resulting in a 15% increase in user retention.• Modernized mobile accessibility with a React Native + Kotlin + Flutter hybrid stack, increasing mobile engagement by 22% and enabling real-time backend sync for over 500K active app users via Firebase.• Integrated Al-driven personalization into the My Highmark experience using Amazon Personalize and custom ML models, increasing user engagement by 12%.• Built a reusable Ul component library using React, TypeScript, TailwindCSS, and Storybook, speeding up development by 30% and reducing Ul issues by 0% through consistent design and code standards.• Enforced WCAG 2.1 AA compliance across core member experiences, enhancing accessibility for over 1.2 million users.• Built and deployed backend services using Node.js, Express to support scalable, event-driven features in a high-traffic healthcare platform.• Implemented dark deployments using feature flags, enabling safe, gradual rollouts and real-world testing before full release.• Instituted a comprehensive testing framework with Jest, Cypress, Playwright, and JUnit, increasing test coverage to 85% and reducing release defects by 20%.• Worked closely with cross-functional teams (Product, Design, DevOps, data science teams) to ensure seamless communication and alignment on project goals, resulting in timely delivery of high-quality products.

Education

• Texas Tech University

  Bachelor's degree, Computer Science