About

Hi, I'm Sander

Hi, I'm Sander

Hi, I'm Sander

Hi, I'm Sander

About

With 19 years of experience, I lead product teams and work hands on in design, collaborating with stakeholders to build product experiences users love while driving measurable business impact.

One of the earliest lessons I learned was at Vodafone and Zalando. Working across international teams in London and Berlin taught me how to collaborate across cultures, align diverse perspectives, and operate effectively in complex organizations. It shaped how I communicate, lead, and build trust at scale.

In my opinion, design only succeeds when it delivers measurable outcomes. At EVBox, restructuring the core funnel led to a 15% increase in sales, reinforcing how directly design decisions influence business results.

Years later, at Booking.com, I learned the discipline of experimentation and testing at extreme scale. We tested cross platform features with tens of millions of daily visitors. Within minutes, hundreds of thousands of users were using a new hypothesis, providing immediate feedback and clear signals to iterate or move on. That way of working fundamentally changed how I approach product design.

At SiriusXM, I led and empowered design teams responsible for products used by millions. From presenting to the CEO and 80+ senior leaders to guiding teams through complex decisions, my focus was on connecting design to strategic direction. As Design Lead on a large scale website redesign serving more than 140 million annual visitors, this work delivered a 4.3% lift in conversion.

I lead product teams, partner closely with stakeholders, and work on complex platforms where decisions have real impact. I thrive in ambitious environments and care deeply about creating products that are not only well designed, but drive clear, measurable outcomes.

With 19 years of experience, I lead design teams and collaborate with stakeholders to build product experiences users love that drive measurable business impact.


One of the earliest lessons I learned was at Vodafone and Zalando. Working across international teams in London and Berlin taught me how to collaborate across cultures, align diverse perspectives, and operate effectively in complex organizations. It shaped how I communicate, lead, and build trust at scale.

In my opinion, design only succeeds when it delivers measurable outcomes. At EVBox, restructuring the core funnel led to a 15% increase in sales, reinforcing how directly design decisions influence business results.

Years later, at Booking.com, I learned the discipline of experimentation and testing at extreme scale. We tested cross platform features with tens of millions of daily visitors. Within minutes, hundreds of thousands of users were using a new hypothesis, providing immediate feedback and clear signals to iterate or move on. That way of working fundamentally changed how I approach product design.

At SiriusXM, I led and empowered design teams responsible for products used by millions. From presenting to the CEO and 80+ senior leaders to guiding teams through complex decisions, my focus was on connecting design to strategic direction. As Design Lead on a large scale website redesign serving more than 140 million annual visitors, this work delivered a 4.3% lift in conversion.

I lead product teams, partner closely with stakeholders, and work on complex platforms where decisions have real impact. I thrive in ambitious environments and care deeply about creating products that are not only well designed, but drive clear, measurable outcomes.

Freelance

Freelance

Fortune 500 / Enterprise corporations

Booking.com

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

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.

Fortune 300 company (name undisclosed due to NDA)

Fortune 300 company (name undisclosed due to NDA)

Hired by DNA.inc

Leading a design team to create a new cross platform streaming experience across TV, smartphone and web around the world’s biggest upcoming sports event for a Fortune 300 company.

T-Mobile

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.

Vodafone

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

Zalando

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

Large enterprises

EVBox

EVBox

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

Greenchoice

Greenchoice

Hired by Qikker Online

Redesign of an energy consumption and generation insight app for the largest sustainable energy provider in the Netherlands.

EuroParcs

EuroParcs

Hired by Fabrique

Designed their new website with brand new design system.

Royal FloraHolland

Royal FloraHolland

Hired by Vandejong

DLL

DLL

Designed their applications website.

Heijmans

Heijmans

Azbuka Vkusa

Azbuka Vkusa

Hired by IceMobile

Helped redesign their supermarket app

Startups and scale-ups

Hegg Energy

Hegg Energy

Designing their iOS and Android apps.

Restocks

Restocks

A full ecosystem of digital experiences: iOS & Android app, website redesign, new design system, and online magazine.

Anytime

Anytime

Hired by Fabrique

Redesigned their website.

Grutto

Grutto

Redesigned their website.

Aion

Aion

Hired by TBWA/X

Braingineers

Braingineers

Designed their online platform.

Boldking

Boldking

Redesigned ther sales funnel.

Verdify

Verdify

Designed their website.

Public institutions

University of Amsterdam

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

Gemeente Amsterdam

Organised and participated in multiple design sprints and designed a new online platform.

Amsterdam Smart City

Amsterdam Smart City

Redesigned their website.

Eye Filmmuseum

Eye Filmmuseum

Redesigned their website.

Chamber of Commerce

Chamber of Commerce

Redesigned a part of their website.

Fulltime

Fabrique

Fabrique

Visual / UX Designer

Generous

Generous

Senior Product & UX/UI Designer

Studio Jan Koek

Studio Jan Koek

Co-founded & Creative Director

Startups I co-founded

Fluently

Fluently

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

The Master Workshop

The Master Workshop

Master workshops by inspiring speakers teaching about creating digital products.

Let's book a call.

Let's book a call.

Let's book a call.

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© Sander Crombach 2026

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© Sander Crombach 2025

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© Sander Crombach 2025

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© Sander Crombach 2025

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Let's book a call.