Jackson F. de A. Mafra

Senior Android & Kotlin Multiplatform engineer

I'm Jackson Mafra, a Brazilian software engineer living in Stockholm, Sweden, with 25+ years of code behind me.

Today I'm a Senior Android developer at Umain, where I work on the McDonald's global app with Kotlin, Jetpack Compose and Kotlin Multiplatform. Before going native mobile I spent years in back-end PHP and JavaScript/Node, and I still enjoy crossing stacks — from Swift on the server to Go and TypeScript. I have a long-running obsession with mobile security:

I build intentionally vulnerable apps, static-analysis tooling and attacker/defender demos, and I speak about Android and KMP at conferences and meetups (mDevCamp Prague, CocoaHeads Stockholm).

I write regularly on Medium and LinkedIn about Android internals, Kotlin Multiplatform and security, and I mentor developers moving into mobile and QA.

Off the keyboard, I'm a gamer and geek.