Jul 16, 2026 • 4 min read
What `adb` Can Teach You About Broken Android IPC Protections
When Android developers hear “permissions,” they usually think about camera prompts, location access, notifications, or storage. But some of the more…
The engineering notebook
Notes from the work.
Android development, architecture, performance, security and the experience of building software.
64 articles · Page 1 of 6
Jul 15, 2026 • 13 min read
How I Used a QA Agent Workflow to Reduce Manual Testing Pressure
Manual testing has a way of growing quietly. This QA agent workflow uses structured documentation, mappings, reports, and prompts to improve traceability…
Jul 8, 2026 • 6 min read
Last year, I worked on a project where we had to build not one, but two versions of the same app.
Last year, I worked on a project where we had to build not one, but two versions of the same app. One ran in the personal profile. The other ran in the…
Jun 17, 2026 • 22 min read
Development, Life, and the Mask No One Sees
A personal story about social anxiety, software, fatherhood, and learning to understand the person behind the mask.
Jun 15, 2026 • 8 min read
Preview-Driven Screenshot Testing For Locales, Keys, And Font Scale
Preview-Driven Screenshot Testing For Locales, Keys, And Font Scale Some testing work starts with a bug. This one started with a client requirement. They…
May 18, 2026 • 7 min read
Dejavu, Compose, And The Difference Between Performance Wins And Guardrails
Dejavu, Compose, And The Difference Between Performance Wins And Guardrails When I first decided to try Dejavu, I was hoping for a slightly dramatic…
May 8, 2026 • 7 min read
Verifying Hardware-Backed Keystore on a Custom Android Build
Verifying Hardware-Backed Keystore on a Custom Android Build When people talk about Android Keystore, the conversation often becomes vague very quickly…
April 20, 2026 • 9 min read
How I Used Perfetto to Separate Real Startup Improvements From Plausible Ones
How I Used Perfetto to Separate Real Startup Improvements From Plausible Ones By the time I opened Perfetto, the app was already faster. That was the…
April 10, 2026 • 7 min read
From Doubt to Demo: A BLE File Transfer PoC for Android and macOS
From Doubt to Demo: A BLE File Transfer PoC for Android and macOS GitHub - LethalMaus/BluetoothFileTransfer Contribute to LethalMaus/BluetoothFileTransfer…
March 26, 2026 • 6 min read
Turning a Wear OS Complication Into a Launcher Shortcut
Turning a Wear OS Complication Into a Launcher Shortcut Wear OS apps often live in the background. Users install them, open them once or twice, and then…
March 23, 2026 • 6 min read
Why HTTPS Alone Is Not Enough for Sensitive Android Payloads
Why HTTPS Alone Is Not Enough for Sensitive Android Payloads When most Android teams talk about securing data in transit, the conversation usually stops…
Mar 16, 2026 • 10 min read
How I Found a 34% Startup Win in a Modern Compose App
How I Found a 34% Startup Win in a Modern Compose App It is easy to assume the big startup wins are already gone once an Android app is modern, uses…