Siebe Koppert
Product Designer (early career) · Mobile
Delft, Netherlands
siebekoppert@gmail.com ·
+31 6 50 90 06 34
linkedin.com/in/siebe-koppert-82434533b
· siebe-koppert.pages.dev
Industrial Design Engineering graduate moving into product design for mobile. I like clear flows, honest product choices, and work that ships. Recent projects include Speelopvliegers (party game for women 50+) and Stira (privacy-first cycle app). Looking for an early-career Product Design role where I can grow craft full-time inside a strong consumer mobile team.
Selected work
Speelopvliegers — mobile party game
- Framed the core experience so one person hosts in the app and everyone else joins free via QR/web — less setup stress in a group.
- Designed the main play path (lobby → vote → reveal → results) with large targets, plain Dutch copy, and one clear action per screen.
- Made the free-to-paid path honest: 5 free questions, then a one-time unlock, with clear restore and no subscription confusion.
- Worked closely with the client on content, tone, legal and store readiness; turned feedback into product decisions without bloating the flow.
Stira — privacy-first period app
- Defined the core problem around trust: keep raw cycle data local/privacy-first, while optional partner sharing stays consent-based and easy to understand.
- Designed key journeys around control and calm UX for sensitive personal data — not growth-first defaults.
- Took concepts through to a working mobile product path, using building as a way to test design decisions in reality.
Padel Next Level — lesson booking
- Protected a tight V1 scope: students book lessons; trainer manages agenda, series, players and level.
- Kept delivery focused on reliability and client-readable test steps instead of marketplace feature sprawl.
Experience
AI Engineer — Global Software Solutions (Teteringen)
- Help the company move faster with AI and ship practical AI solutions on Microsoft Power Platform.
- Build and deliver Power Platform solutions for day-to-day business use; work with stakeholders on what actually needs automating.
- Strong at getting things out the door. Actively moving toward product design because I want ownership of problem framing and UX, not only ticket execution.
Education
BSc Industrial Design Engineering — TU Delft
Skills
Problem framing
User flows
Mobile UX
Stakeholder collaboration
Accessibility-minded UI
Figma (learning)
Prototype via real builds
Expo / web literacy
Dutch native
English professional