Hi, I’m David Paterni, a product designer for AI enabled SaaS and complex workflows.
I turn model outputs, predictive signals, and messy product logic into clear experiences people can trust and use, and as a Design Engineer, I build them in production.
Range, iOS rehab form coach
A doubt removal machine for solo knee rehab. On device pose estimation corrects form in real time without making a vulnerable person feel watched, and shows range of motion climbing week over week. Three live interactive moments inside.
Conformly, EAA compliance agent
Accessibility, delivered as evidence. Deterministic detection mapped to EN 301 549, fixes shipped as real pull requests, and a hash-chained, tamper-evident audit trail. It never says you're compliant; honest status is the product.
Vantage, time to insight
Observability. Turning a sea of fragmented signals into one line to the cause: hand-built accessible topology and flame-graph visualization, an AI read-lane, and a deliberate handoff to Oversee for execution.
1QR
Scan once. See the real total. Pay before anything moves.
Programmatic SEO that earns its long tail
How Much Would I Have If: a what-if investment calculator, ~1,070 static pages built to rank honestly.
Next.js + TypeScript + Tailwind, on Vercel
Criterion: The AI interview coach that shows its work.AI Product Design Lab
Short design explorations on turning model behavior into workflows people can trust, understand, and act on.
Turning overlooked behavior into a new product opportunity
How identifying a real world signing gap led to a high impact proof of concept for KeySign.
A review score you can't buy
DreadRobot: skeptical AI tool verdicts. A five axis score, hard caps for tools that lie, integrity enforced in the build.
Kinetic Design System
A consumer banking design system built around motion and clarity, with real tokens, components, and screens where money that moves feels like it.
Kernel Design System
Design system. Live, fluid, in light and dark, with real tokens, components, blocks, and screens.
Readout, data and dashboard design
Data visualization. The judgment behind a good dashboard: the right chart for the question, honest scales, drill-down on demand, and accessibility built in, not bolted on.
The Interaction Layer, a masterclass in how software feels
Seven principles of interaction design: feedback, perceived performance, affordances, reversibility, disclosure, direct manipulation, and input, each grounded in HCI law and proven with a live, hands-on demo.
Transforming customer context into actionable clarity
A case study on building a unified context feed that helps agents resolve conversations faster, powered by replay intelligence.
Designing clarity into large-scale personalization systems
A design-led approach to explaining model behavior, simulating change, and enabling confident decisions.
Notification Sieve
A calm, context-aware filter that intercepts the noise, escalates only what matters, and lets you catch up on your terms.
Designing real estate moments people can trust
A deeper look at how I transformed familiar home-search patterns into a high-trust experience, centered around Sneak Peek listings.