Gabriel Palmyro

Mobile Engineer (Flutter) at CarOnSale, based in São Paulo, Brazil.

I also build and publish my own apps end to end: the Flutter app, the backend, the infra, the analytics and the store listing.

Portrait of Gabriel Palmyro
  • Forgetless
  • Heat Game
  • Sequência
  • Dustpan
Now
Mobile Engineer at CarOnSale (Germany, remote)
Building
Forgetless, Heat Game, Sequência, Dustpan
Stack
Flutter, NestJS, infra, analytics, ASO
Education
Computer Engineering, Federal Institute of São Paulo

Apps I build and publish.

Two are live on the App Store and Google Play, one is in development and one is open source.

  1. Forgetless
  2. Heat Game
  3. Sequência
  4. Dustpan

In developmentiOS and Android, coming soon

Forgetless

Turns the TikToks, Reels, videos and links you save into workouts, recipes, places on a map and reminders. You can also ask it questions about what you saved.

Visit getforgetless.com

LiveCo-founder, iOS and Android

Heat Game

A game app for couples. I co-founded it and work on all of it: the Flutter app, the NestJS backend, infra, analytics and ASO.

Visit heatgame.com.br

LiveCo-founder, iOS and Android

Sequência

A cooperative party game for 2 to 14 players on a single phone. Everyone gets a secret number from 1 to 100 and gives a clue on a theme, then the group uses deduction to put the clues in order.

  • 2M+players
  • 4.8rating
Visit sequenciaparty.com

Open sourcemacOS, open source (MIT)

Dustpan

A native macOS menu bar app that watches disk, memory, CPU and GPU and shows what is safe to delete on a developer Mac (Xcode, simulators, Gradle, node_modules). Written in SwiftUI with no dependencies.

Visit github.com/GabriPalmyro/dustpan

Earlier projects.

Client, team and personal work from 2020 to 2024.

Social impact, May 2024

ToAquiRS

A platform for finding rescued animals in shelters after the May 2024 floods in Rio Grande do Sul, so owners could get their pets back.

Flutter, Firebase, Cloud Functions, Google Maps API

DetailsPrivate code

Personal project, Since Dec 2020

Treino Fácil

A fitness app for organizing, creating and sharing workout routines. It has 150+ exercises with images and videos, ready-made workouts and tracking for each exercise.

Flutter, Firebase, Provider, Codemagic

Team project, Feb 2023 to Jul 2023

Own Quest

A platform for writing and playing branching stories. React and TypeScript on the frontend, NestJS and MySQL on the backend, deployed on Vercel and Amazon EC2.

React, TypeScript, NestJS, MySQL, AWS EC2, Vercel

Health tech, Apr 2023 to Nov 2023

Omni Saúde

A Flutter health app for finding medication, scheduling deliveries and managing prescriptions, with PIX payments and real-time updates.

Flutter, GetX, Supabase, PIX

DetailsPrivate code

Where I have worked.

  1. Aug 2025 to presentGermany, remote

    CarOnSale

    Mobile Engineer (Flutter)

    • Flutter engineer on the CarOnSale mobile app, a B2B platform for used car trading in Germany.
    • Remote from São Paulo, contracted through my own software company.

    Flutter, Dart

  2. CurrentSão Paulo, Brazil

    Heat Game

    Co-founder and Mobile Engineer

    • Co-founded a game app for couples, live on iOS and Android.
    • Build the Flutter app and the NestJS backend, and run the infra, analytics and ASO.

    Flutter, NestJS, Infra, Analytics, ASO

  3. Nov 2024Austin, USA

    GSD

    Senior Software Engineer

    • Designed and built a neighborhood e-commerce app from scratch in 2 months with Flutter, Bloc, Injectable and Dio interceptors.
    • Integrated Stripe payments, handling the logic for credit cards and other payment types.
    • Automated CI/CD with Codemagic for Google Play and the App Store, reducing manual deployment work by 70%.

    Flutter, Bloc, Injectable, Stripe, Codemagic

  4. Nov 2023 to Jul 2025São Paulo, Brazil

    XP Inc.

    Software Engineer II

    • Led the redesign and development of the Home Investments section for 1M+ users.
    • Maintained a large monorepo serving 7 brands, with Cubit and Bloc, GetIt and Injectable.
    • Built the Account Balance Hub, reading and writing asset data with SSE for real-time events.
    • Wrote E2E automations with Python and Robot, reducing manual testing time by 50%.
    • Led the migration of client portfolio features from Kotlin to Flutter.

    Flutter, Dart, Bloc, Firebase, Drift, SSE

  5. Apr 2023 to Nov 2023Brazil

    Omni Pharmacare

    Mid-Level Flutter Developer

    • Took a health tech app from MVP to 50,000+ active users.
    • Clean Architecture, unit and integration tests, GetX for state and routing.
    • CI/CD with Codemagic for production and staging.

    Flutter, GetX, Supabase, Sentry, PIX

  6. Mar 2023 to Aug 2023Brazil

    WBC Sistemas

    Mid-Level Flutter Developer

    • Coordinated the mobile team and published 7 Flutter apps with different flavors.
    • Redesigned existing app interfaces and built web apps with Next.js.

    Flutter, Next.js, Team leadership

  7. Sep 2021 to Mar 2023Brazil

    WBC Sistemas

    Junior Flutter Developer

    • Shipped Flutter apps to the App Store and Google Play, owning the release process.
    • SOLID principles, Provider for state and dependency injection, Agile with Kanban.

    Flutter, Provider, SOLID, Agile

  8. Dec 2020Brazil

    Treino Fácil

    Personal project, Flutter Developer

    • Took a Flutter fitness app from concept to publication on the stores.
    • 40%+ user retention over 6 months. Firebase services and CI/CD with Codemagic.

    Flutter, Firebase, Provider, Codemagic

What I work with.

The tools I use day to day across mobile, backend, infra and product.

Mobile

  • Flutter
  • Dart
  • Bloc / Cubit
  • GetX
  • Provider
  • Firebase
  • Codemagic
  • App Store and Google Play releases

Backend and infra

  • NestJS
  • Node.js
  • TypeScript
  • Supabase
  • MySQL
  • VPS (Nginx, PM2)
  • Cloudflare
  • AWS EC2
  • CI/CD

Web

  • Next.js
  • React
  • HTML / CSS
  • Vercel

Product and quality

  • Analytics (GA4, Firebase)
  • ASO
  • Unit and E2E testing
  • Sentry / Crashlytics
  • Dynatrace
  • Git

What colleagues say.

“I relied on Gabriel for all technical decisions. He’s an incredible colleague, always committed and highly skilled.”

Felipe BufelliSoftware Engineer

“Excellent professional!”

Pedro Henrique Ton PaulettiCloud Solution Architect @ Microsoft

“Very dedicated, always delivering exceptional results.”

João Vitor Ribeiro da LuzFull-Stack Developer

“Very professional and always collaborative with the team.”

Isadora Muiños LopesExecutive Director

The company behind the apps.

My software company. It develops and publishes mobile apps, and I work through it as a contractor.

Legal name
GABRIEL PALMYRO MARTINS DESENVOLVIMENTO DE SOFTWARE LTDA
CNPJ (Brazilian company ID)
50.257.343/0001-04
Location
São Paulo, Brazil
Contact
apps@gabrielpalmyro.com

Email me about apps, partnerships or work.

apps@gabrielpalmyro.com

It’s the fastest way to reach me. I’m also on LinkedIn and GitHub.