Paulo Tadashi Tokikawa
iOS engineer. I build native SwiftUI apps backed by clean data models, and I keep my UI layer in a design system separate from any single app — so the same components can outlive the product they were built for.
This is a living notebook, not a brochure: case studies, architecture notes, and the occasional dead end.
Projects
Klassify
Build your own rating system — custom categories, custom parameters, your own scoring logic.
KikawsDS
The SwiftUI component library every app of mine draws from — versioned and tested independently.
See the full projects page for more.
Under the hood
Each project page links to a case study with the problem, the data model, and what's still in progress. Two more pages go deeper on how it's all put together:
- Architecture overview — the principles behind both projects: why models own their invariants, why persistence stays at the edges.
- Why I split out a design system — the reasoning behind KikawsDS living in its own package instead of inside Klassify.