Md Sabbir Ahmed Khan · Singapore
Senior Android Engineer. Product Builder. Startup CTO.
I’m Sabbir — “Rey” to most people. For 12+ years I’ve shipped production Android: DJI drone-control systems, Samsung Health, fintech across two markets, and complete MVPs for founders who needed a CTO before they could afford one.
01 · Pathways
What brings you here?
For recruiters & eng leaders
Hire me
12+ years of senior Android engineering — Kotlin, Compose, KMM. Currently leading a mission-critical drone-app rewrite in Singapore. Open to senior, staff and lead roles worldwide; relocation-ready.
See the workFor clients
Build your product
You bring the idea. I design, architect and ship it — AI-accelerated velocity with 12 years of engineering discipline behind every decision, from first commit to store release.
How I workFor founders
Partner with me
No technical co-founder? I become your CTO under contract: I build the entire product now, and earn a percentage plus equity when you raise. Your job is the raise — mine is everything technical.
Read the model12 +
years shipping Android
100 +
apps delivered as founder of Power GP BD
500 K+
downloads on a single app (Theatre)
100 +
developers trained across Asia, selected by Google
02 · Selected work
Projects that shipped.
Case study
DJI Drone-Control Platform
Ground-up rewrite of a mission-critical drone app — multi-module architecture, real-time TCP, now flying in production.
Read morePlay Store
Football Predictor 2026
A bracket engine that resolves FIFA’s new 48-team knockout from 450+ combinations — in real time, fully offline.
Read moreEquity CTO
Study Quran
A startup’s complete Android product — teacher marketplace, live classes, payments — built solo in two months.
Read moreOpen source
GitHub Client
My “how I write code” exhibit: multi-module clean architecture, Compose M3, and real unit + UI tests.
Read moreAI-first, engineer-led
Coding agents write faster than any human. Judgment still decides what ships — and I own every line.
03 · Next step
Let’s build something that ships.
A role, a product, or a partnership — the first step is the same.