Nuriye Sultan Kostak · Senior Product Designer / UX/UIEverything can be designed.

I like exploring what an idea could become. I work to understand people, try different approaches, and turn ideas into products people can use.

Hi! I'm Nuriye

Values

What guides my decisions

Research comes first: the market, the data and what others got wrong. If I don't understand the problem, I can't design for it.

What users need, what the business needs, what design adds and what the team can build. I weigh them together.

Dashboards show what is happening. People tell me why. I want both before I decide.

What they're trying to do, where they get stuck and why they leave.

I ship what solves the problem, measure it, then improve it.

Every screen needs a reason. I give flow, structure and words the same care as the visuals.

I design for the real team, budget and timeline, then make it as clear and useful as those limits allow.

An eight-stage growth system for clients who dropped off after their first sessions.

A home screen that changes between morning and evening.

Some results along the way

~50%more paid sessions after a booking and payment redesign

+55%conversion uplift from eight months of A/B testing

22×return on a single CRO initiative

Where I've workedHopgogo · HiDoctor · Erlab · Invesp

Work with me

I take on a few projects at a time. Each one starts the same way: understanding the problem before designing anything.

Are you a designer? I also mentor on portfolios, job search and growing in your career. Mentoring →

I write about psychology, AI and the business side of UX.