Ehsanul Hoque

About

I've spent five+ years writing Kotlin across surfaces — production Android apps, a cross-platform chat SDK in Kotlin Multiplatform with shared UI in Compose Multiplatform, build tooling, and the backend-adjacent glue around them. Real-time chat over WebSocket, WebRTC voice calls, in-app billing on Google and Huawei, offline sync, encrypted downloaders, and the unglamorous infra that keeps things stable in the hands of users on a thousand different devices.

Currently with Numrah (remote from Dhaka), where I built a production chat SDK from scratch in Kotlin Multiplatform — shared Compose Multiplatform UI, consumed by several apps in production — shipped two apps end-to-end, and helped pull a legacy Kotlin app from a 2.5-star rating up to 4.5 by chasing crashes and migrating it from RxJava to Coroutines and Flow. Before that, two product orgs in Dhaka — native Android, Flutter cross-platform, an app that crossed a million users.

I like the boring half of the work: the WebSocket reconnect that survives a dropped connection, the encrypted downloader that streams chunks without spiking RAM on a budget phone, the Gradle plugin you can delete to cut build times in half, the Python script that automates the release. I write here occasionally about what I learn — the notes are mostly for future me, but you're welcome to read them.

Off-keyboard: long walks across Dhaka, slow coffee, and the occasional half-finished side project that taught me something useful before it died.