I've spent 10+ years building Android below the app layer: system services, HALs, Binder, OTA/recovery, and lately Android Automotive audio at RNTBCI and Marelli. Before that I worked on JioBook's multi-window framework at Radisys, rugged Zebra handhelds, and Sonim's carrier builds for AT&T, Verizon and Sprint. I write about Android internals on Android Audio and my AOSP boot-sequence guides, which get 2K+ monthly readers. If you're an app developer moving into platform or automotive work, or you're preparing for framework interviews, I can help you get there faster.