Hi, I’m Jeroen
At Postman, that means working on the kind of product complexity most designers avoid: messy systems, overlapping workflows, millions of developers depending on things working right. I care as much about what gets built as how it’s designed.
Unpacking those problems, asking uncomfortable questions, understanding how things actually work. That’s where I do my best work. AI is a big part of how I do that now. I use ChatGPT and Cursor constantly to explore ideas, challenge my own thinking, and get prototypes in front of people fast. It made me faster and more capable, and it pulled me closer to engineering, which is where I think design is heading anyway.
I’m often in the codebase. Prototyping, experimenting, occasionally fixing a rough edge myself rather than filing a ticket. It means the details actually get handled: the states, the edge cases, the interactions that usually get lost between design and engineering.
Outside of work, I’m usually renovating my house, sketching in 3D in SketchUp, or building some app that only solves a problem for me. Oh, and I’m a metalhead. That’s me.
experience
Where I've been
Senior Product Designer
Postman • from 08/2022 to present
I joined as Product Designer and was promoted to Senior. I work on collaboration and workspace systems used by 35M+ developers. The problems are rarely isolated: navigation, sharing, permissions, and discovery all touch each other, and changes ripple across the product. I dig into the complexity first, define the right problem, and design end-to-end solutions before deciding how they look. I build alliances across disciplines, product, engineering, and leverage those relationships to move complex multi-team initiatives forward. I mentor designers, help evolve how the team approaches AI and prototyping, and contribute to the design system.
- Simplified the workspace model from five types to three, driving 24% paid collaborator growth and ~$2M ARR in a single quarter
- Increased share conversion from 8% to 28% through UX-led improvements across key flows and interaction patterns
- Grew weekly comments from ~750 to 7,000+ through discoverability and ease of use
- Prototyped interaction models directly in code (HTML/CSS/JS) to validate ideas early and reduce design–engineering handoff
- Identified and resolved UX “paper cuts” and edge cases across core flows, improving product quality and reducing friction at scale
- Communicated design decisions and trade-offs clearly in async environments across product, engineering, and data
Product Designer
Ubisoft, i3D • from 09/2018 to 08/2022
Sole designer on an infrastructure platform used by game studios to run multiplayer games for 250M+ players. The backend was powerful but API-first with no real frontend. Teams configured deployments through documentation and APIs, with little visibility into what would actually happen at runtime. I redesigned the entire product end-to-end: server management, order flows, login, monitoring, and every operational workflow in between, turning a system that was hard to predict into one that teams could configure and operate confidently under real launch pressure.
- Designed the full platform end-to-end, from no frontend to a complete operational system serving 250M+ players
- Built the design system from scratch across all tooling
- Supported launches of The Division, Rocket League, and Skull and Bones
Designer
Studio Steenbergen • from 10/2008 to 10/2018
Designed and shipped 75+ client websites end-to-end: UX, branding, build, and SEO. Handled the full process from client brief to launch, mostly solo.
Education & Courses
How I got here
Reforge • 2021/2022
Scaling Product Delivery
User Insights for Product Decisions
Growth.Design • 2021
Product Psychology Mastery
Nielsen Norman Group • 2020
UX Master Certification
CareerFoundry • 2019/2020
UX Design
Competence Factory • 2019
Usability
Interaction Design
Skills & Tools
What I bring
- End-to-end product design (0 to 1 and scale)
- Human-AI interaction design
- Complex workflow and systems design
- Design-engineering collaboration with limited handoffs
- Prototyping in code (HTML, CSS, JS, AI-assisted)
- Interaction design for high-density UI
- Design systems and scalable patterns
- Edge case and failure-state design (shift-left thinking)
- Product strategy and decision-making
- Async collaboration and communication
- AI-native product workflows
- High ownership in fast-paced environments
- Figma, Cursor, ChatGPT, Claude Code, Lovable, Git, SketchUp, Adobe