Simon Callsen

Simon Callsen

Senior UX Designer

7 years at Shopify – now building my own tools in Tokyo.

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Currently Building
Katsuyou Drill

Katsuyou Drill

updated 3 weeks ago

A tool to practice conjugating Japanese grammar forms.

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Japanese Study

Japanese Study

updated today

Personal Japanese study learning tool.

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Case Studies
Shipping Rates Refactor
Shopify2025

Shipping Rates Refactor

Redesigned how shipping rates are presented in Shopify's admin—making a technically complex pricing structure approachable for first-time setup while remaining flexible for advanced use cases.

Available on request
Pickup in Store Extensibility
Shopify2024

Pickup in Store Extensibility

Redesigned Shopify's buy-online-pickup-in-store system to support inventory transfers across locations, unlocking a critical use case for multi-location merchants.

Available on request
About

I spent seven years at Shopify designing shipping and fulfillment software, starting as an intern and leaving as a senior designer.

I enjoyed working on larger problems that spanned multiple teams—taking them from initial pitch through to execution.

I'm currently based in Tokyo, going to Japanese language school, and building my own tools on the side. I'm looking for a product design role at an English-friendly company in Japan.

simon.callsen@gmail.com