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David Arango
Senior Frontend Engineer specializing in large-scale React and TypeScript applications
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About
Frontend engineer with production experience at CarGurus, including leading a React/TypeScript "pizza tracker" feature for vehicle sellers and diagnosing a hidden CTA bug that materially hurt conversion until they traced it through LogRocket session replays. Combines strong React performance instincts with practical UX debugging, testing discipline, and cross-functional collaboration.
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Key Strengths
- Built and led a complex production React/TypeScript seller-tracking feature end to end
- Strong frontend architecture with container/presentational patterns and reusable components
- Performance optimization in React through context splitting, memoization, lazy loading, and profiling
- Data-driven production debugging using analytics, manual testing, and LogRocket session replay
- Resolved a conversion-impacting CSS bug and restored metrics to baseline
- Proactive quality improvements through Playwright/Cucumber E2E coverage and unit tests
- Cross-functional collaboration with product, management, and third-party animation vendors
- Attention to accessibility and UX in dynamic loading experiences
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