Product Owner & Expert AnalystProduct OwnerTurkcell13 years

I take enterprise products from idea to delivery.

I have been a product owner at Turkcell since 2017: from public tenders to legal workflows, I define the scope of enterprise processes that still run by hand, and I follow delivery all the way through. That is my main job. Outside work I apply the same discipline on my own with AI — not as a replacement for it, but as something that feeds it. Ten of the apps that came out of that are on the App Store.

Not in a hurry? You can also walk through all of this in 3D tour mode

// I started out watching alarms at three in the morning at Ericsson; the road led here.

Regaip Sefa Çotur
Regaip Sefa Çotur
Istanbul · 2026
A frame from the 3D tour: a walkable island, the project showcase and the roads 3D Tour

You can explore this portfolio by walking through it

The projects, the CV path and the social area are laid out on a walkable island. I built it from scratch with Three.js.

🚶 Enter the 3D tour

How I Work

01

I own it end to end

My job does not stop at writing the spec: I also decide the scope, the data model and which features are genuinely needed. Saying "no online payments, one admin account is enough" on Aktif Life was part of that ownership — building a tool that is actually used rather than one that does everything.

02

I chase the root cause

When something "behaves strangely", I do not stop there. I diagnosed the location bug in Rota Planlayıcı live in the simulator and followed it all the way to a library change; I solved the white screen in Sakin Nokta by digging down to the limits of the render engine.

03

I narrow scope deliberately

On every project I also define clearly what will not be built, and I keep that in writing. Leaving something out of scope is as much a decision as putting it in — and usually the harder one.

Curious where these habits come from: the story that starts with watching alarms at three in the morning →

Open to talk

What I am looking for

Senior Product Owner and product management roles — especially where complex enterprise processes turn into products. I am always glad to talk about how AI-assisted development changes product decisions, too.

Istanbul · hybrid or remote · [email protected]

Products I Built With AI

Ten of them are live on the App Store. For my enterprise work and the rest, see the projects page.

Outside Work

Cartoons

One frame, one sharp joke

The design of this site comes from there too. My favourites are on the hobbies page.

Series

The long-running ones

Shows I have followed for years, dropped, and come back to.

Films

Watched again and again

I do not rate them; these are simply the ones I keep going back to.

Let's talk

A Product Owner role, a process that needs to go digital, or the question "could we build this with AI" — all three go to the same address.