Case studies & experiments
Selected product work across fintech, mobility, SaaS, design systems, and health — plus interaction experiments built in code.
ExperimentEnergy tracking for better daily decisions
Daygrain is my current product experiment: a personal energy and decision-making app built around daily logging, Apple Health signals, and honest self-awareness.
ExperimentBuilding petermarc.com — design, code, and AI in one repo
A full rebuild of my portfolio and services site: not a template swap, but a typed content layer, token-driven CSS, scroll-linked sections, and a component library shaped around how I actually pitch founder work — built iteratively in Cursor with the same stack I recommend to clients..
ExperimentHolographic card carousel
Klarna card selector that feels like flipping through Pokémon trading cards — ghost-duplicate infinite scroll, pointer tilt, accelerometer-driven holo layers, and iOS haptic steps..
ExperimentIcon burst
Native Apple-style app icons bursting outward in every direction on tap.
Have a product flow that feels harder to explain than it should?
Send me your product, MVP, deck, or prototype. I'll tell you where I'd start.