Writing & technical notes
Writing on frontend systems, billing workflows and AI product interfaces.
Technical notes from projects, prototypes and product workflow analysis.
Testing Help-Center Retrieval Before Generation
Comparing TF-IDF, embeddings and hybrid retrieval on a fake help-center dataset
Designing a UI QA Inspector That Separates Screenshot Evidence from DOM Evidence
Lessons from building a UI QA tool that drafts findings from screenshots and DOM snippets.
Designing a Review Queue for Revenue-Risk Support Messages
How I designed a support message review queue that turns messy billing requests into structured, inspectable risk signals.
Why SaaS Billing Systems Still Get Failed Payments Wrong
A breakdown of the flat retry pattern: treating different payment failures the same, then applying one retry and access policy to all of them.