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Freelance developer · React & Next.js · Brasília, BR

AndréBordignon

Nine years building web and mobile products — from first commit to recurring revenue. Interfaces that hold up under real users, plus the part nobody wants: performance, billing and deploys.

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01 — About

I don't ship pretty screens. I ship products that survive their second month in production.

I've been a software engineer for over nine years, specialized in React and React Native. I work inside teams — modernizing production apps used daily in retail — and alone, from scratch, on my own products.

In practice: I pick the payment integration thinking about Pix and Brazilian invoicing, I hunt 1,472ms of INP down to the guilty listener, I upgrade dependencies in waves that revert with a single command. And I write the decision down, because a year from now someone will ask why.

Good software is the software that still makes sense the day you have to change it.

9+

years building web and mobile

2

own products in production

4

React Native apps shipped

∞

builds running at 2am

02 — Work

What I've built — and why it turned out this way.

My own products, client work and code running in production right now. Each with the technical decision that shaped the outcome.

07 selected projects

012025 — hojeProduct, architecture and code

CondoStatus

B2B condo management SaaS

My own product, from zero to recurring revenue: multi-tenant with Supabase RLS, invites, per-condo permissions and trial-before-billing. Live in production with real building managers.

Technical decision

Asaas over Stripe — native Pix Automático, recurring boleto and NFS-e are non-negotiable for Brazilian B2B. Then a mobile INP hunt: 1,472ms traced down to a single mousedown listener in the user menu.

Next.jsSupabasePostgreSQL/RLSAsaasTailwindVercel
Read the casecondostatus.com.br
022026Game design and engineering

Candle Cross

The Bitcoin chart became a dirt track

A browser dirt-bike game where the terrain is generated from real weekly BTC candles from Binance. No engine: physics, collision and rendering hand-written in JavaScript.

Technical decision

Catmull-Rom spline turning candles into continuous, rideable terrain, combo multipliers and perfect-landing detection. Vanilla JS instead of Unity: builds light enough for web game portals.

Vanilla JSCanvas 2DBinance APIVercel
Read the caseGitHub
032024 — hojeMobile engineering

CISS S.A.

Production React Native apps, modernized without stopping delivery

Building and modernizing production Expo apps in retail. The hard part isn't shipping a feature — it's upgrading a live app without breaking the people who depend on it daily.

Technical decision

Modernization in waves: one dependency cluster per PR, every phase revertible with a single git revert. Before any risky bump, a Jest characterization net — the app had zero tests. New Architecture already enabled.

React NativeExpo SDK 53TypeScriptJestEASHermes
Read the case
042026Freelance · full-stack

ACOP

An institutional site built to convert memberships

Site for the condo association of western Paraná with a full admin panel: member and company registration, events with RSVP, gallery and attendee approval. Annual contract.

Technical decision

Forms with React Hook Form + Zod, automated tests on every one of them — that's where the client's revenue comes in. Admin panel on Next API routes, serverless Postgres on Neon.

Next.jsNeonReact Hook FormZodTailwindVercel
Read the case
052026Own project

Crypto Analytics

My trading indicator, ported to the browser

A market dashboard on top of DefiLlama's Pro API, with the Smart Trend Predictor X indicator logic ported from Pine to JavaScript. Funding rate, open interest and Binance klines in one panel.

Technical decision

A serverless proxy in front of the paid API — the key never reaches the client. The indicator runs in the browser over the same data the exchange serves.

Next.jsDefiLlama ProBinance APIChart.jsVercel
Read the case
062026Product and engineering

Cinematic Engine

The engine rendering this page

A cinematic site template with engine and skin fully separated: theming via CSS variables, pages assembled from a declarative section registry, and a library of pluggable 3D heroes.

Technical decision

Changing one line in brand.ts reskins the entire site — color, type and WebGL lighting together. Born as a done-for-you service, it became the product that sells the rest.

Next.jsGSAPLenisReact Three FiberTailwind
Read the case
072026Own project

Poker Tournament Timer

A tournament clock that feels like a casino floor

A poker tournament manager with automatic blind progression, table controls (play, pause, quick time adjustments) and visual alerts. Built because Friday's home game needed it.

Technical decision

The whole tournament state in Zustand, ready to persist — the clock survives a refresh mid-level. Next.js 15 with the App Router.

Next.js 15TypeScriptZustandTailwind
Read the caseGitHub

There's more

Boilerplates, experiments and projects that never became case studies — all open on GitHub.

See all casesgithub.com/AndreBordignon
03 — Services

How I can help.

André Bordignon is a Brazilian freelance developer based in Brasília, working remotely across Brazil, with nine years of experience in React, React Native and Next.js — building web and mobile products from first commit to recurring revenue.

Freelance developer

André Bordignon is a Brazilian freelance developer who builds custom websites, web systems and mobile apps — solo, from the first commit to software running in production with paying customers.

See the service

Cinematic websites

A cinematic website is one where scrolling directs attention the way a camera directs a shot: each section is a scene, motion has weight and intent, and the page tells a story instead of listing information.

See the service
04 — Craft

Tools matter less than knowing when not to use them.

Production stack, not a tutorial list. What's here is what I've broken, fixed and kept running.

Frontend

Interface as product: predictable state, cheap renders, genuinely accessible.

  • React
  • Next.js
  • TypeScript
  • JavaScript
  • Tailwind CSS
  • Styled Components
  • Redux
  • Zustand
  • React Query
  • Vite
  • Webpack
  • HTML5
  • CSS3

Mobile

Production Expo apps — including the boring part: native builds, SDK upgrades and EAS.

  • React Native
  • Expo
  • EAS Build
  • iOS
  • Android
  • Hermes
  • New Architecture
  • Mobile UI/UX

Backend & Data

Multi-tenant with RLS, API routes, payment integrations and serverless Postgres.

  • Node.js
  • NestJS
  • Express
  • PostgreSQL
  • Prisma
  • Supabase
  • Neon
  • REST
  • GraphQL

Motion & 3D

Directed scroll, WebGL tied to the narrative, and motion that respects reduced-motion.

  • GSAP ScrollTrigger
  • Lenis
  • React Three Fiber
  • three.js
  • GLSL
  • Framer Motion
  • Canvas 2D

Delivery

CI, tests where it hurts, and deploys that aren't events. Core Web Vitals as a requirement.

  • Git
  • GitHub Actions
  • Docker
  • Vercel
  • AWS
  • Jest
  • Cypress
  • Lighthouse CI
  • Web Vitals

Practice

9 years shipping with teams: code review, mentoring and technical decisions written down.

  • Agile
  • Scrum
  • TDD
  • Code Review
  • Liderança técnica
  • Mentoria
  • Documentação de decisão
05 — Contact

Let's build something.

Open to freelance projects, product work and a technical conversation with no strings attached. Fastest replies on WhatsApp and email.

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Freelance developer — André Bordignon | React & Next.js