sabbir.khan

Partner with me · Fractional CTO & technical co-founder

Your CTO — before you can afford a full-time one.

You’re a non-technical founder with a real idea. Investors want to see a product. Building one takes a senior engineer, and a senior engineer’s full salary is money you’ll have after the raise. Every early founder knows this loop — most get stuck in it.

Here’s my answer: I join as your CTO on a paid contract and build your app and the entire technical side of the company. Equity can replace part of the fee — that’s how the number fits a pre-seed budget — but it’s a paid engagement, not a favour.

Call it a fractional CTO, a founding CTO, or the technical co-founder you haven’t found yet. The label matters less than the arrangement: a senior engineer accountable for the entire technical side of your company, at a price you can carry before the raise.

The engagement

What you get

Your product, built end-to-end

From first wireframe to App Store and Play Store release, the product gets designed, architected and shipped — by one senior engineer who has done it for 12+ years.

Every technical decision, handled

Stack choices, architecture, vendors, releases — the entire technical side of your company is my problem, not yours. You get a CTO, not a contractor.

Weekly progress meetings

A standing weekly check-in, in plain English. You always know exactly where the product stands and what ships next.

You focus on funding & marketing

The division of labour is explicit: you own fundraising, marketing and customers. I own everything technical. That’s the whole point of the model.

Investor & pitch support

Technical due-diligence answers, architecture slides, roadmap credibility — when investors ask hard questions, your CTO is in the room.

Your future team, hired right

When funding lands, I interview and hire your first engineers and hand over a codebase they’ll thank you for. I’ve trained 100+ developers — building teams is familiar ground.

Compensation

A paid engagement, sized for a pre-seed budget: a monthly retainer or milestone fees, agreed before a single line of code is written. Equity can offset part of the fee — never all of it.

Proof, not promises

Live engagements

Live on the App Store · Compose Multiplatform

Diraya Education

As the startup’s CTO, I built Diraya Education — a “Learn & Share Islam” education app — as one Kotlin codebase with Compose Multiplatform, shipping iOS first with Android to follow from the same code. Scholar-verified Knowledge Bites, Seerah lessons with quizzes, streak tracking and shareable answers; Firebase Auth, Firestore, Crashlytics and Cloud Messaging, with PostHog analytics. Free to users, no paywall.

  • One Kotlin codebase: Compose Multiplatform UI shared across iOS and Android
  • Live on the App Store for iPhone — Android follows from the same code
  • Knowledge Bites, Seerah lessons with quizzes, streaks and shareable answers
  • Firebase Auth, Firestore, Crashlytics and Cloud Messaging, with PostHog analytics

Live on Google Play · Pre-seed, raising

Study Quran

As the startup’s CTO, I built its complete Android product in two months — working in my spare time. Google sign-in, a teacher marketplace, live class scheduling, free trials and secure payments, integrated against the founding team’s backend APIs alongside their admin panel. One senior engineer, zero to Play Store, while the founders focused on the raise.

  • Google sign-in, free trials and secure payments
  • Teacher marketplace with live class scheduling
  • Zero to Play Store in two months — built in spare time
  • Founders stayed 100% focused on their raise

In build

E-commerce startup

Full mobile product for an early-stage e-commerce venture — product, architecture and delivery handled end-to-end under the same partnership model.

In build

Language-learning app

A gamified education product in the Duolingo mold. I own the technical build while the founder validates the market.

More products are in build right now under this same model. They stay unnamed until their founders are ready to launch — that discretion is part of the deal.

Fit matters

I don’t say yes to every idea

I take on a small number of partnerships at a time — the model only works when both sides commit. Here’s what I look for:

01

You’re committed

This model only works with founders who are all-in on their venture. If it’s a side experiment, I’m not the right partner.

02

You own the business side

I take the technical hassle completely off your plate — which means you must be ready to drive fundraising and marketing with the same intensity.

03

We put it in writing

Scope, fees and any equity are agreed up front in a clear contract. Clean terms protect both of us and keep your cap table investor-ready.

Have an idea worth building?

Send me a short pitch: the problem, who has it, and why you’re the one to solve it. If it’s a fit, we talk the same week.