Guillem Roca Guillem

Software Engineer — Android · Barcelona

Currently building at Wallapop

Based in Barcelona.

About

I re-envision how people interact with media technologies.

I’m an Android engineer in Barcelona, currently building at Wallapop, and an expert in Kotlin, Android and Jetpack Compose.

Lately I’ve been packaging Android and Kotlin Multiplatform engineering practices into skills for AI coding agents.

Projects

Pinned on GitHub,
refreshed daily.

agent-skills-android Production-grade engineering skills for AI coding agents tailored to Android Shell Stars: 2
androidify Sample app for Androidify Kotlin Stars: 0
compose-multiplatform Compose Multiplatform, a modern UI framework for Kotlin that makes building performant and beautiful user interfaces easy and enjoyable. Kotlin Stars: 2
compose-recompositions Some samples to explain how recompisitions work and how to optimize the implementation Kotlin Stars: 0
sample-chat Pubnub Sample Chat architecture Kotlin Stars: 0
samples-jetpack-compose A collection of Jetpack Compose sample projects demonstrating best practices, UI components, and advanced features. Kotlin Stars: 0

All repositories

Stack

01 Android
02 Kotlin
03 Jetpack Compose
04 Kotlin Multiplatform
05 Java
06 Gradle
07 MVVM / MVI
08 Clean Architecture
09 Coroutines

Elsewhere

About

Catalan by language, retro gamer by habit.

Outside work I translate games and handheld software into Catalan, tinker with retro handhelds, and build small apps just for the fun of it.

Lately

Translating: AM2R, Another Metroid 2 Remake, into Catalan
Localizing: spruceOS for retro handhelds, in Catalan
Following: N64 decompilations: Paper Mario, Star Fox 64

Made for fun

Elsewhere