"The larger and more challenging the project, the more I thrive."
Fortune 500 / Enterprise corporations I worked for as a freelancer

Booking.com
Designed and experiment tested cross-platform wishlist features with tens of millions of daily visitors, for the world's leader in online travel.

SiriusXM
Hired by DNA.inc
Led a team of four designers from Spain and the Netherlands and collaborated with New York teams to redesign the website of one of the biggest U.S. audio platforms with over 140 million annual visits, resulting in a 4.3% increase in sales rate after launch.

Vodafone
Designed a brand new consumer IoT smartphone app to transform your home into a smart home, for a well-known Fortune 500 company.

Zalando
Redesigned of a smartphone app and desktop web app for in-house startup Collabary, part of a world-famous e-commerce enterprise.

T-Mobile
Designed a new sales funnel for purchasing a fixed telecom package for home use, designed for one of the largest mobile communications companies worldwide.
Large enterprises I worked for as a freelancer

EVBox
Led the redesign of EVBox.com, driving a 15% boost in conversion for a global company with over 550,000 EV chargers.

Greenchoice
Hired by Qikker Online
Redesign of an energy consumption and generation insight app for the largest sustainable energy provider in the Netherlands.

EuroParcs
Hired by Fabrique

Royal FloraHolland
Hired by Vandejong

DLL

Heijmans

Azbuka Vkusa
Hired by IceMobile
Startups and scale-ups I've worked for as a freelancer

Hegg Energy

Restocks

Anytime
Hired by Fabrique

Grutto

Aion
Hired by TBWA/X

Braingineers

Boldking

Verdify
Public institutions I worked for as a freelancer

University of Amsterdam
Led two teams to redesign the website of the largest university in the Netherlands - a 200,000-page giant - with a new modular grid and design system.

Gemeente Amsterdam

Amsterdam Smart City

Eye Filmmuseum

Chamber of Commerce
Agencies I worked at fulltime

Generous
Senior Product & UX/UI Designer

Fabrique
Visual / UX Designer

Studio Jan Koek
Co-founded & Creative Director
Startups I co-founded

Appeteaser
Get real user feedback on your Figma / Bolt / Lovable prototype.

Fluently
Online distraction-free editor with a multilingual translator, grammar checker, and synonyms library built-in.

Very Disco
Everything ever mentioned on your favourite podcasts.

My Queue
Create a playlist of written articles.

CaseChat
Everything ever mentioned on your favourite podcasts.

The Master Workshop
Master workshops by inspiring speakers teaching about creating digital products.