Quby basically threw me their Android app and said 'it's broken, fix it.' No documentation. No one to explain the code. The app was crashing constantly and draining phone batteries, and thousands of people with Toon thermostats were angry.
This project represents the kind of technical leadership and strategic thinking that drives successful platform transformations. Working with Quby (Toon by Eneco), we tackled complex challenges that required both deep technical expertise and business strategy alignment.
The approach combined hands-on technical execution with strategic oversight, ensuring that every technical decision supported broader business objectives. This is the kind of fractional CTO engagement that transforms companies from being limited by their technology to being empowered by it.
The results demonstrate what's possible when you combine migration expertise with technical leadership: faster delivery, improved team productivity, and sustainable growth built on modern technology foundations.
Reverse-engineered undocumented codebase to understand architecture
Identified and fixed critical performance and stability issues
Optimized battery usage and connectivity with IoT devices
Delivered working solutions without requiring extensive documentation or support
Successfully navigated complex, undocumented Android codebase
Fixed critical app crashes and battery drain issues
Maintained IoT connectivity while improving performance
Delivered results independently without technical guidance
Resolved critical user experience issues that were driving customer complaints
Demonstrated ability to work independently with challenging codebases
Proved I could deliver results without handholding or extensive documentation
Established reputation for tackling difficult technical challenges independently
This taught me that you don't always get perfect handovers and documentation. Sometimes you just have to dig in, read the code like a detective story, and figure it out. Now when clients say 'warning: our code is a mess,' I'm not worried.
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