Architected a QR‑code login flow to authenticate new devices through Tunnelbroker via an identity service API to verify keys.

Supported spoiler markdown across web, iOS, and Android clients with React, React Native, and flow‑typed Javascript.

Implemented a feature to pin chat messages involving database schema updates to MariaDB and SQLite, alongside a redux‑persist migration to ensure consistency across varying client versions.

Prototyped drawing functionality supported across over 5,000,000 Alexa devices such as the Echo Show 15 with Java and Alexa Presentation Language (APL)

Leveraged Kotlin and the MockK library to integrate unit tests to target the draw feature and widgets panel

Optimized the Android Flood Fill algorithm to improve standard fill tool performance by between 200-800% and reduce memory consumption