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probelalkhan/README.md

Belal Khan. Android engineer and Google Developer Expert focused on on-device AI.

Follow Belal Khan on Instagram Watch Simplified Coding on YouTube Connect with Belal Khan on LinkedIn

Website  ·  Google Developer Expert profile  ·  Email


Hello. I am Belal.

I am a Senior Android Engineer at American Express, a Google Developer Expert for Android, and the creator of Simplified Coding.

For more than 10 years, I have built mobile products, designed Android architecture, and helped developers turn difficult ideas into software they can ship. Today, much of my work explores the point where mobile engineering meets AI.

Mobile systems

Scalable Android architecture, Kotlin, Jetpack Compose, Kotlin Multiplatform, modularization, performance, testing, and developer tooling.

AI on the phone

Local LLMs, on-device RAG, Gemma, Gemini Nano, LiteRT, llama.cpp, privacy, memory limits, latency, and reliable inference.

Selected work

A Gradle plugin that generates Retrofit APIs and Kotlin models from YAML using KotlinPoet.

Gradle Kotlin KotlinPoet

Hands-on Android examples for local generative AI using Gemini Nano and ML Kit GenAI APIs.

Android On-device AI Gemini Nano

A multi-module Android application built with Kotlin, Jetpack Compose, and modern architecture.

Compose Modular architecture Kotlin

A complete authentication flow with Compose, Ktor, token refresh, Hilt, and clean architecture.

Ktor Hilt Clean architecture

What I am exploring now

I am investigating what changes when useful AI moves from the cloud to the phone. My current work covers local inference, retrieval-augmented generation, private document search, model constraints, and the engineering tradeoffs required to make these systems useful on Android.

Android Kotlin Jetpack Compose Kotlin Multiplatform Gradle On-device AI Gemma Retrieval augmented generation

Beyond the code

Through Simplified Coding, I share practical Android, Kotlin, AI, and software engineering lessons with more than 118K YouTube subscribers. Apps I have worked on and published have crossed 2M downloads.

I speak and run workshops for developer communities. I also serve on the Droidcon India Program Committee and contribute as a mentor, reviewer, and hackathon jury member.

Good engineering is not only about making something work. It is about understanding the tradeoffs, making the decision clear, and helping the next engineer move faster.

Engineering activity

Belal Khan GitHub contribution streak


Build carefully. Explain clearly. Keep learning.

Instagram  ·  YouTube  ·  LinkedIn

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