Crafting impactful products for 10+ years, engaging over 160,000 users, collecting over €23 million in donations and connecting over 500 communities worldwide.

Genève, Switzerland

Member since Mar 2025

UX Design / Research

UI / Visual Design

Mobile Design

UX designer (Senior) at Sietzema UX 2024–Present

UX designer (Senior) at Donkey Mobile 2019–2024

UX designer at Touchwonders 2017–2019

UX designer at DutchGiraffe 2016–2017

UX designer at Shifft 2014–2015

Bachelors in Communication and multimedia design, Rotterdam University of applied sciences 2016

Freelance or contract opportunities

Full-time opportunities

3 followers 13 following 234 tags

Available for new projects

Get in touch Sietze-Jan Sietzema