Juan Beldi

Juan Beldi
Frontend Engineer

Principal Frontend Developer at Monks in Buenos Aires. I build fast, polished web experiences for global brands with React, Next.js and a healthy obsession with motion and performance.

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Selected work

Projects I'm proud of

A selection of products and interfaces I have designed, built and shipped.

2026Amazon

Frontend Engineer

Sustainability AI Insights Tool

An AI-powered chat and document analysis tool that helps Amazon’s sustainability team explore reports and surface insights.

ReactTypeScriptTailwind CSSZustandMotionVite
2025Amazon

Frontend Engineer

Amazon Sustainability

Amazon’s global sustainability site and annual report experiences, localized for multiple regions and built on Adobe Experience Manager.

Next.jsReactTypeScriptSass
2024U.S. Air Force · GSD&M

Frontend Developer

U.S. Air Force — airforce.com

Work on airforce.com and an immersive 3D “warfare” experience built with React Three Fiber.

ReactTypeScriptThree.jsReact Three Fiber
2024Unilever · Google

Frontend Developer

Rexona × Google creative campaign

An interactive campaign experience for Unilever’s Rexona, produced with Google’s creative partnership team.

ReactTypeScriptSassGSAP
2023Starbucks

Frontend Developer

Starbucks PWA

A progressive web app for Starbucks built with Next.js, focused on speed and an app-like feel.

Next.jsReactTypeScriptSass
View all projects

Blog

Latest writing

Notes on Next.js, React and the web platform.

Coolify thumbnail

Sep 8, 2026

Self-hosting Coolify on your own server

A step-by-step guide to installing Coolify on any Linux VPS, using a fresh Debian server as the example: serve it from your own domain over HTTPS and deploy your first app.

Next.js thumbnail

Sep 16, 2025

Using <picture> in Next.js for responsive images

A short guide on how to optimize images using the picture element in Next.js

Read the blog

Toolbox

Technologies I work with

The languages, frameworks and tools I reach for day to day.

Languages

Frontend

Styling

Backend

Testing

  • Jest
  • Playwright
  • Cypress

Tooling

Experience

Where I have worked

  1. Oct 2021 — Present

    Buenos Aires, Argentina

    Principal Frontend Developer

    Monks

    Joined Monks (formerly MediaMonks) as a Junior Front End Developer and progressed through Semi-Senior and Senior to Principal. I build websites, campaigns and web apps for global brands such as Amazon, Starbucks, Unilever, Riot Games and the U.S. Air Force.

    • Main frontend contributor on Amazon’s sustainability site across two annual report cycles.
    • Built an AI-powered insights tool with a React 19 frontend and Express backend.
    • Delivered WebGL and motion-heavy experiences with Three.js, React Three Fiber and GSAP.
    • Contributed to the Buenos Aires frontend playground and internal Next.js skeleton.
    ReactNext.jsTypeScriptGSAPSassStorybookAdobe Experience Manager

About

A little about me

Portrait of Juan Beldi

I’m a frontend engineer from Buenos Aires. I studied web development and design at Escuela Da Vinci and joined Monks (then MediaMonks) as a junior developer, working my way up to Principal Frontend Developer while shipping work for Amazon, Starbucks, Unilever, Riot Games and the U.S. Air Force.

My day-to-day is React and Next.js with TypeScript, but I’m just as comfortable animating with GSAP, rendering 3D with Three.js or wiring up a CMS.

Let's build something together.

I'm not taking on new work right now, but I'm always happy to chat.

[email protected]LinkedIn