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Design, AI & Prototyping Stack

Design, AI &
Prototyping Stack

Design, AI & Prototyping Stack

A few projects I'm proud of.

A few projects I'm proud of.

What I've shipped, what I learned,
where the design got pushed back on hardest.

What I've shipped, what I learned, where the design got pushed back on hardest.

What I shipped. What I learned.
Where the design was pushed the hardest.

Guardrail

An AI-assisted UX workflow that turned two workshops into a working interactive prototype scientists could pressure-test in three weeks.

Workshop synthesis into a five-step decision flow

Interactive prototype built in three weeks

Three usability forums with domain experts

Read Case Study

Guardrail constraint panel grouping hard stops, watchouts, adjacent checks, and brand rules.

Guardrail

An AI-assisted UX workflow that turned two workshops into a working interactive prototype scientists could pressure-test in three weeks.

Workshop synthesis into a five-step decision flow

Interactive prototype built in three weeks

Three usability forums with domain experts

Three usability forums with domain experts

Read Case Study

OnCase

An evidence-led attention layer for community-based case managers, with synthetic sessions used to test the research protocol while primary user validation remains the next step.

60-entry evidence catalog with source classification

Five synthetic adversarial sessions used to test the research protocol

Accessible Material 3 prototype backed by 103 checks

Supervised referral agent with approval gates

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OnCase attention view with evidence and system blind spots visible

OnCase

An evidence-led attention layer for community-based case managers, with synthetic sessions used to test the research protocol while primary user validation remains the next step.

60-entry evidence catalog with source classification

Five synthetic adversarial sessions used to test the research protocol

Accessible Material 3 prototype backed by 103 checks

Accessible Material 3 prototype backed by 103 checks

Read Case Study

Solen Health App

A health app making a doctor's reasoning visible, not a diagnosis, built from a real diagnostic odyssey.

Eight survey participants navigating unresolved care

Questions and reasoning made visible, not conclusions

Working interactive prototype

Four rounds of usability testing and iteration

Read Case Study

Solen mobile care timeline organized by concern and date.

Solen Health App

A health app making a doctor's reasoning visible, not a diagnosis, built from a real diagnostic odyssey.

Eight survey participants navigating unresolved care

Questions and reasoning made visible, not conclusions

Working interactive prototype

Working interactive prototype

Read Case Study

Keep Pace

A ride-aware fueling assistant for cyclists

Cupboard-first planning model

Plan → Ride → Reflect learning loop

Glanceable, low-attention in-ride UI

Live MVP prototype

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Keep Pace in-ride screen showing upcoming fuel and remaining food.

Keep Pace

A ride-aware fueling assistant for cyclists

Cupboard-first planning model

Plan → Ride → Reflect learning loop

Glanceable, low-attention in-ride UI

Glanceable, low-attention in-ride UI

Read Case Study

View all case studies

View all case studies

Proven Impact at Enterprise Scale

A decade in UX — including seven years leading design across 25+ global brands at Estée Lauder. Strategy, systems, mentorship, and an AI-enabled practice that compounds team velocity.

Under 1 week

functional prototype ·
usability testing began in week two

Estée Lauder

4-5 active builds

aligned through shared design standards · across a 20+ application ecosystem

Estée Lauder

4–6 teams.
25+ global brands.

primary design voice across the
Concept-to-Market platform

Estée Lauder

Under 1 week

functional prototype ·
usability testing began in week two

functional prototype ·
usability testing began in week two

Estée Lauder

4–5 active builds

aligned through shared design standards · across a 20+ application ecosystem

Estée Lauder

4–6 teams.
25+ global brands.

primary design voice across the
Concept-to-Market platform

Estée Lauder

"Ahead of the curve on integrating AI into his workflow, particularly around A/B testing and validation, which has compressed our design cycles meaningfully."

John Farese

Technical Director · Estée Lauder

"A rare ability to translate technical and regulatory requirements into clear, human-centered experiences teams can align around with confidence."

David Kaufman

R&D and PLM Systems · Estée Lauder

"Bringing ideas from our smartest and brightest to life — balancing the needs of users with our own business goals."

Chris Hickey

CEO · RingLead

Behind the numbers: a structured AI-enabled design practice combining ChatGPT, Claude, Firefly, Figma, Vite, and Vercel; design standards adopted across the Concept-to-Market platform; and a decade of cross-functional UX leadership at Estée Lauder, Dopamine, and RingLead.

How I Work

Where do you tend to add the most value?

Usually around the second or third sprint of an initiative — once the team realizes the problem is messier than the brief implied. I'm useful when the requirements are still moving and someone needs to translate technical, regulatory, and business constraints into something the team can actually decide against. (At Estée Lauder this looks like Concept-to-Market workflows; before that it was data-heavy SaaS at RingLead.)

Where do you tend to add the most value?

What does your AI-enabled practice actually look like?

What kind of team do you work best with?

LinkedIn

© 2026 Michael Cullinan Principal UX Designer

LinkedIn

© 2026 Michael Cullinan Principal UX Designer

LinkedIn

© 2026 Michael Cullinan Principal UX Designer