Side & Personal Projects Featured

Packybara

A Brazilian package tracking app with a pixel-art capybara companion that reacts to shipment status updates.

Timeline February 2026 - Present

Tech Stack Kotlin, Jetpack Compose, Material3, Hilt, Room, Ktor, Firebase, Supabase

Stakeholders Online shoppers in Brazil who track packages from Correios, AliExpress, Shopee, and more

Brief Overview

Packybara is a package tracking app designed for the Brazilian market, where tracking shipments from multiple carriers (Correios, AliExpress, Shopee, Anjun, J&T) typically means juggling different websites and apps. A pixel-art capybara mascot accompanies the user through each delivery journey with contextual animations and messages in Portuguese.

Problem Statement

Brazilian online shoppers frequently order from multiple platforms — Correios for domestic, AliExpress and Shopee for international — each with their own tracking system. There’s no single, delightful app that consolidates all carriers with personality and charm.

Challenge & Scope

Multi-carrier aggregation: Automatic carrier detection via regex patterns on tracking codes, with a unified API layer through RapidAPI/PacoteVicio
Capybara personality system: CapyMessageMapper maps (status, latestEvent) to contextual sprite states, animations, and Portuguese messages via keyword matching
Pixel art rendering: 64x64 sprites rendered with nearest-neighbor filtering and optional 4-frame animation, all defined as ImageBitmap resources
Push notifications: Firebase Cloud Messaging for real-time tracking updates via Supabase edge functions
Clipboard intelligence: Detects tracking codes on the clipboard and suggests adding them via a bottom sheet

My Role & Process

Solo developer under BigRat Studios. Designed the pixel art sprites, built the full Android app with Jetpack Compose + Material3, implemented the carrier detection and tracking normalization layer, and set up the CI/CD pipeline for Play Store deployment.

Key Technical Decisions

Ktor over Retrofit — lightweight, Kotlin-native HTTP client that plays well with coroutines
Room for local persistence — offline-first with PackageEntity and TrackingEventEntity
Hilt for DI — standard Android DI, keeps the single-module architecture clean
PressStart2P font — reinforces the pixel-art identity across the entire UI
Supabase for backend — auth, postgrest, and edge functions without managing infrastructure

Outcome

Currently in closed testing on Google Play. The app supports all major Brazilian carriers, features a fully animated capybara companion, and is positioned for public launch.

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