About

Hi, I’m Ricardo — an Android engineer with over 10 years of experience building for the platform. Portuguese by origin, based in Poland by choice (the food is excellent and I have no regrets).

I spend most of my time writing Kotlin and thinking about architecture, software design, trade-offs, and how to write code that’s still readable a year from now. I’ve also been writing about Android for a while — I’ve co-authored three published books on Android development, all available on Kodeco. You’ll also find most of my Android/Kotlin articles there.

Outside of work: I’m into specialty coffee (the kind that comes with tasting notes and a suspicious price-to-volume ratio), gaming, anime — One Piece is objectively the best and I will not be taking questions — mechanical keyboards (I build my own), and my dog, who is obviously the best and cutest dog in the whole world. I also go to the gym and try to eat well. That said, I never say no to a good burger.

You can find me across the internet:

• GitHub: rcosteira79
• Stack Overflow: ricardo-costeira
• Kodeco: rcosteira
• Medium: @rcosteira79
• LinkedIn: rcosteira
• Mastodon: @rcosteira79@androiddev.social
• Bluesky: @rcosteira.bsky.social
• X / Twitter: @rcosteira79

If you’d rather see the formal version of all this, here’s my CV.