Hey, I'm Paul.
I build things
people use.

E2E Testing

Auth0 Universal Login, global setup/teardown, the Google OAuth button hijack, and what broke when we actually ran them

Accessibility

WCAG 2.1 AA compliance — vitest-axe for unit-level scans, systematic primitive audits, and where automated tooling helps vs. where it doesn't

Shared Design System

Extracting tokens and components into @paul-portfolio npm packages — CSS custom properties, thin framework wrappers, and token aliasing across React and Angular apps

AI Agent Patterns

SSE streaming, state machines, tool call UI, approval gates, and streaming markdown — the patterns behind modern agent interfaces

AI Security & Bare Repo Attacks

Prompt injection via CLAUDE.md, hardened least-privilege configs, deny lists, and sandboxed environments for untrusted code

V2 Redesign

URL-based version routing with next/dynamic bundle splitting — Three.js out of the default path, v2 ships a clean slate

Render Performance

Runtime rendering costs: context instability, resize allocation, backdrop-filter GPU pressure, and unbounded DOM growth

Operator Dashboard

Fleet management with tiered polling, optimistic updates, data freshness, and a globalThis singleton for in-memory state

CI E2E Reliability

Auth0 crashing all middleware from a module-level throw, and a search test that needed page.route to stop depending on an external API

Web Vitals

Real-user metrics, sendBeacon, P75, and the collection pipeline

Messenger Auth Bug

Why links opened in Facebook Messenger showed a logged-in hub for unauthenticated users, and the two-line fix

Performance Improvements

Eliminating the dark-mode flash, ISR on static pages, lazy-loading below-fold sections, and caching public API routes

Testing

640+ tests (623 unit + 17 e2e), Vitest + MSW + Playwright, and the delay() trick for proving optimistic updates fire before the server responds

API Hardening

Zod validation, fixed-window rate limiting, and body size limits across every API route

Ketsup

A social app for image and text posts, built and shipped at its own domain

Route Restructure

Why / replaced /protected, the force-static trade-off, and how auth is still enforced

UI Redesign

Why CSS keyframes gave way to Framer Motion, where Three.js went, and what's actually measurably better

CSP & Security

Why 'unsafe-inline' is the right call for Next.js static pages, and what actually prevents XSS

Bundle Analysis

How the analyzer found Auth0Provider shipping jose to the browser for no reason

GraphQL

Why GraphQL, why plain fetch over Apollo

NBA Playoffs Bracket

TDD with MSW, derived state, TBD resolution, submit vs. auto-save design, and leaderboard before results

Calendar

Views, timezone handling, BFF auth pattern

TCG Pages

API proxy, server/client split, pagination patterns

Search Bar

Server/client split, filtering, and trade-offs

Landing Page

Section layout and functionality preview

Styling Decisions

CSS Modules vs Tailwind v4 and design tokens