Rasterfield

Hi, I'm Miyuki!

Designing complex application platforms that scale—without creating risk, friction, or long-term maintenance debt.

Built, maintained, and QA checked using Claude Code — AI-assisted development from design to deployment.

Case Study 01

White-Label Product & Auth0 Integration

After a security incident exposed registration vulnerabilities, redesigned and integrated Auth0 for 250,000 members across a white-label superannuation platform serving 5 client brands — without breaking consistency across any of them.

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White-Label Product & Auth0 Integration
Case Study 02

Recurring Contribution Visibility

Built the first-ever operational tool for finance teams to track and manage 600–800 monthly contributions across complex settlement cycles — designed as a strategic bridge to PayTo instant payments.

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Recurring Contribution Visibility
Case Study 03

Personal Contributions Automation

Replaced a manual Excel-based exception process with a scalable in-system workflow for managing 250+ daily personal contribution transactions — bringing unallocated transaction handling off spreadsheets and into the platform.

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Personal Contributions Automation
Case Study 04

AI in Practice

Two experiments applying AI to real design workflows — competitor benchmarking that killed a low-value feature request, and AI-accelerated research synthesis. Honest about where AI helped and where it didn't.

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AI in Practice
Graphic Design

Graphic Design & Art Direction

Personal design projects exploring print, packaging, and visual identity — from Bauhaus-inspired strategy cards to annual wine label art direction.

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Graphic Design