From messy product idea to dev-ready prototype in 2 weeks
I'm Peter Marc. I help technical founders turn rough ideas, unclear AI features, and half-built MVPs into product flows your team can test, pitch, and ship.
Selected clientsKlarnaRakbankGuestyWoltAmazonEasyPark
Startups don't need more design theatre. They need product clarity
Most early products aren't held back by missing pixels. They're held back by unclear thinking that everyone can feel but no one has time to fix.
Your MVP is hard to explain
The idea is strong, but it takes three paragraphs and a diagram before anyone gets it.
Your demo needs too much narration
The product can't carry the story on its own, so every pitch leans on a founder talking over it.
Engineering is moving faster than design
Devs are shipping while the product direction is still being figured out in real time.
AI features feel powerful but unclear
There's real capability under the hood, but the experience doesn't make it obvious or trustworthy.
The product looks less mature than the company
The team and ambition are serious. The interface quietly undersells both.
You need senior judgment, not a full-time hire
You want someone who's seen this before, without committing to a headcount you can't justify yet.
A focused 2-week sprint
Not a full redesign theatre piece — a tight loop from diagnosis to something your team can ship.
[ 01 ]
Diagnose
Audit the flow, funnel, or demo. Map where clarity, trust, or momentum breaks — and what to fix first.
[ 02 ]
Prototype
Turn the priority into flows and a clickable prototype your team can test with users, investors, or engineering.
[ 03 ]
Handoff
Leave with dev-ready decisions, specs, and a clear backlog — not another deck that needs narration.
Founder speed. Senior design judgment
I'm not an agency and not a generic freelancer. I'm one senior product designer who can sit in the messy middle with you — from a rough idea, not only a polished brief.
I've shipped products where unclear UX costs real money: fintech onboarding, mobile commerce, platform merges. I use AI tools to compress product cycles, not to replace thinking.
This isn't a typical client-service relationship. I share feedback honestly, align with founders and product teams, and care about outcomes as much as the work itself.
I can move from strategy to prototype to handoff without dropping the thread. I know when you need a system and when you just need to ship.
Fifteen years of shipping real product
I've worked on products where unclear UX costs real money and trust: fintech, mobile, logistics, and complex B2B, across startups, scaleups, and enterprise teams.
Services for startups that need product clarity, activation and faster delivery
I find the exact moments where users, buyers or teams lose clarity, then turn them into sharper flows, prototypes, and implementation-ready decisions.
Activation & Onboarding
Fix the path from signup to first value.
Demo & Sales Experience
Make complex products easier to understand, demo and sell.
AI Workflow Sprint
Help product teams move faster from idea to prototype and implementation.
Design System & UI Debt
Reduce inconsistency and speed up product delivery as the product scales.
Writing about AI-native product design, design systems, and startup execution
Short, opinionated notes on building product with less theatre and more clarity.
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.