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Product designer based in europe

Crafting Intuitive Digital Experiences That Drive Results

Turning insights into strategic, growth-focused design solutions tailored for you. I design scalable, impact-driven UX that converts and retains users

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Services

Here's how I can help

Design focused on understanding users' needs and behaviours. I create custom, user-centric designs. They not only look stunning but also function seamlessly for your users.

Product Design

I design digital experiences that simplify workflows, increase engagement, and boost conversion rates.

Design Systems

Scalable design systems that ensure brand consistency and reduces development time by +30%

User Research

I conduct deep user research to uncover insights that drive better product decisions, reducing UX debt early on

UX Audit

I identify usability pain points and optimize flows, improving task completion rates and customer satisfaction.

Portfolio

Recent work

Here's a collection of some previous projects. But please bear in mind that the majority of my work is covered under NDA and is not available publicly.

Celonis

Streamlining UX at Celonis

Reduced onboarding friction, boosted workflow success rates, and established scalable research frameworks.

CarMagic

Redefining Digital Car Ownership Through User-Centered Design

Simplifying car maintenance with a mobile-first app, growing customer retention rates by 5–9% MoM.

Freshly

Transforming Beauty Appointments: Designing an Intuitive Online Booking Flow for Freshly

An all-in-one platform for beauty salon business owner to manage their day-to-day operations.

Whistle

Bridging Mobile & Desktop: Redesigning Whistle’s Selling Experience for Increased Conversions

Whistle is a selling app to resell electronics, like iPhones, MacBooks, iPads, and other electronic devices.

Meet Your Designer, Kostas

I’m Kostas, a Product Designer based in Europe with 10+ years of experience. I specialize in creating user-centric designs that drive engagement and deliver value. I’ve worked with a range of clients across industries like fintech, SaaS, and e-commerce, providing innovative, reliable design solutions.

Testimonials

What People Say

Hala

Staff Product Designer

Celonis

Kostas has a really pleasant personality & a good sense of humour which helps break the ice and can be very effective in putting users at ease in usability tests. He learns fast and maintains a calm demeanor and thinks clearly in difficult or stressful situations which is a great advantage in a teammate.

Andrew

Head of Product Design

Kaleo Design

We have worked with Kostas on numerous projects and he is always professional, timely and executes his product design process fluidly. Kostas is a great asset on any project we work with him on. We highly recommend him for your app design, web design needs.

Philip

Co-founder

BTNG Studio

Working with Kostas has been a very positive experience. He's very communicative and able to quickly pick up any project. His unique mixture of UX and Online Marketing make him a valuable partner of BTNG.

Ben

Team Manager

Former Colleague

Kostas is a fantastic person to work alongside. His efficiency and work ethic are great at delivering projects quickly and his knowledge helped me out no end.

Sebastian

Product Manager

Celonis

Kostas and I worked on making the first contact points with our product an easy and intuitive experience. He continuously championed our users, thereby facilitating a user-centred design. Thanks to his excellent work, we understand our users better, and the product is easier to use. Kostas is also a pleasant and fun person to work with.

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