Angel Liendo

I'm a Senior Frontend Developer, specializing in scaling web applications, modernizing legacy codebases, and building high performance user experiences. Over the past 6+ years, my focus has been bridging the gap between complex engineering requirements and business goals. I don't just write clean React and TypeScript code, I focus heavily on frontend architecture, performance optimization, and building systems that help engineering teams ship faster and with fewer bugs. You can see my programming projects in: https://github.com/aliendostea In my recent roles, I have worked leading initiatives to migrate large scale legacy React applications alongside other Senior Frontend Dev to modern React 18 and Astro.js frameworks, reducing technical debt and improving development speed. Optimized high traffic platforms to improve Core Web Vitals, leading to measurable increases in user retention and application speed. Established robust automated testing practices using Jest, Vitest, and Playwright to ensure highly reliable production releases. Developed reusable component libraries that unified cross-functional design and engineering workflows. These are some of the technical stack that I love: - Frontend: JavaScript Vanilla/TypeScript, ReactJS, Css Grid, AstroJs, Next.js, Zustand, StoryBook - Testing: Vitest, Playwright, Jest - Backend: Astro, NodeJs, Express - Database: SQLite, Mongodb, MySQL - DevOps & Tools: Docker, Pnpm, Jenkins, Azure, GitHub, Linux, git Earlier in my career, I worked in digital agencies where I developed and designed multiple landing pages and websites for a wide range of clients, including well-known international brands. This background gave me a solid foundation in UI/UX, responsive design, paying attention to design details, which continues to strongly influence my frontend development approach today.