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Selected case studies — deeper dives into projects I’ve designed and built end to end, with screenshots and the outcomes that mattered.
3 case studies
Mobile · React Native2026
WhatsLink
A React Native app that turns any phone number into an instant WhatsApp chat link — message anyone without saving them to your contacts.
React NativeExpoiOS & Android
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Full-Stack & SEO2025—present
Medical Practice Site
A static Next.js site for Dra. Lidia Pérez, a general-medicine doctor in Costa Rica — built end to end, then grown with hands-on technical SEO and an AI-assisted analytics loop.
Next.jsSEOMCP
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Live toolTool · TypeScript2026
Time Calculator
A DST-aware world-clock utility: convert a time (or time range) from your country to major world timezones at once. Built on the browser's Intl API — no dependencies, runs fully client-side.
Next.jsIntl APITypeScript
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