Seven years designing shipping, delivery and pickup at Shopify.
I was the sole designer on cross-functional squads there, taking work from pitch through execution. Since leaving in 2025 I've been designing and building my own projects with AI-assisted development, and taking part in hackathons around Tokyo.
Open to product design roles at English-friendly companies in Tokyo — simon.callsen@gmail.com
01Case studies
Rebuilding how stores price shipping, to match how merchants actually think about it
Making it clear how each store location is set up online
Letting stores move stock between locations, so one missing item stops blocking an order
02Personal projects
A daily study dashboard that tracks textbook progress, drills vocabulary with spaced repetition, and pulls in anime, news, and generated stories for reading practice.
A Steam Deck plugin that reads Japanese text on screen, looks up each word in a dictionary, and saves them for later study — without leaving your game.
Study tool to practice conjugating Japanese verbs
03Hackathon projects
Parse Japanese nutrition labels (栄養成分表示) into a simplified, honest view.
Pick a kanji, see what it is made of, keep exploring. Neo4j + Daytona graph explorer with a pixel UI.
Find the best train station exits for your destination.
An agentic browser-based game.
04Background
Designing and shipping personal projects using AI-assisted development, and participating in hackathons
Japanese language studies from Beginner 1 (~N5) to Advanced 5 (~N2)
- Senior UX Designer2023–2025
Designed merchant-facing experiences across shipping labels, multi-location fulfillment, local delivery, pickup and order routing
- UX Designer2018–2023
- UX Intern2018
Graphic Design Advanced Diploma