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Available for new projects Frontend & Mobile Engineer

I build interfaces that feel alive.

I'm Brandon — a frontend & mobile developer obsessed with motion, detail, and code that's actually tested. I turn ideas into fast, polished products that feel great to use.

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Frontend craft Mobile apps Tested & reliable
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Tools I reach for every day

React React React React Native Flutter Flutter Astro Astro Next.js Next.JS TypeScript Typescript Dart Dart NestJS Nest.JS Node.js Node Jest Jest Vitest Vitest Swift Swift Kotlin Kotlin Figma Figma React React React React Native Flutter Flutter Astro Astro Next.js Next.JS TypeScript Typescript Dart Dart NestJS Nest.JS Node.js Node Jest Jest Vitest Vitest Swift Swift Kotlin Kotlin Figma Figma
About me

From pixel to production

Brandon Manzo Frontend & Mobile Developer
Guatemala

I'm Brandon, a developer with 7 years years of experience shipping user-centered products. My heart is in the frontend and on mobile — crafting interfaces that are smooth, accessible, and a joy to use.

But I don't stop at the surface: I'm comfortable across the backend, and I genuinely love QA, automation, and testing. Solid tests are how I ship with confidence and sleep at night.

Fun fact

When I'm away from the keyboard you'll find me drawing, playing video games, and chasing the spot where creativity meets clean software.

7+ Years building software
7+ Shipped projects & apps
20+ Languages, frameworks & tools
100% Commitment to testing
What I do

Skills that ship products

A full-stack toolkit with a frontend-first soul. Here's where I bring the most value.

Frontend Development

Accessible, performant and animated interfaces with React, Next.js and Astro. Pixel-perfect, responsive, and delightful in motion.

Mobile Development

Native-feeling cross-platform apps with Flutter and React Native — from idea to the App Store and Google Play.

Backend Development

Reliable APIs and services with Node and NestJS. Clean architecture, sensible data models, and endpoints that scale.

QA & Automation

Automated pipelines and end-to-end coverage that catch bugs before users do — so every release ships with confidence.

Testing

My favorite craft. Unit, integration and e2e tests with a TDD mindset. Code that's documented, trustworthy and safe to change.

★ favorite
Stack

Technologies & tools

The toolbox I use to design, build, test and ship.

Frameworks & Libraries
React React React React Native Flutter Flutter Astro Astro Next.js Next.JS NestJS Nest.JS
Languages
TypeScript Typescript JavaScript Javascript Dart Dart Kotlin Kotlin Swift Swift Rust Rust C++ C++ .NET .NET HTML5 HTML CSS CSS
Testing & QA
Jest Jest Vitest Vitest Testing Library Testing Library Postman Postman
Tools
Git Git GitHub Github Neovim NeoVim Xcode Xcode Android Studio Android Studio Node.js Node Vercel Vercel Figma Figma Storybook Storybook Prettier Prettier ESLint ESLint
How I work

Why work with me?

01

Design + Development

I bridge design and engineering to create products that are visually polished and technically solid.

02

User-centered approach

I design intuitive, engaging interfaces built around real user needs — not assumptions.

03

Performance obsessed

Fast, smooth and reliable by default, using performance best practices on every layer.

04

Tested & reliable

I back features with automated tests, so what works today keeps working tomorrow.

Selected work

Projects

A few things I've built and shipped — straight from my GitHub.

Minimal Tic Tac Toe

A clean, minimalist Tic Tac Toe game for Android — my dive into mobile development with Flutter, live on Google Play.

Dart Dart Flutter Flutter
Code View

DPI Validator

A lightweight Dart package to validate Guatemalan DPI numbers, fully tested and published on pub.dev.

Dart Dart
Code View

NIT Validator

A lightweight Dart package to validate Guatemalan NIT numbers, fully tested and published on pub.dev.

Dart Dart
Code View
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Contact

Let's build something great

Have a project, an idea, or just want to say hello? My inbox is always open.

Send me an email Connect on LinkedIn

I'm always open to new projects, collaborations, or simply saying hello 👋.