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Product Design & Strategy

Your product is more complex than it needs to be

Let's find out why.
Let's solve that together.
I've seen this before.
The right specialist
Brutal clarity.
The right diagnosis.
Your product has potential. The gap between where it is and where it should be is costing you growth.
Brands we worked with
Case studies

Work that speaks for itself

THE CLARITY METHOD

How complexity becomes clarity.

Five phases: Diagnose, Align, Design, Build, Compound. Every engagement follows this thread, whether it's a two-week audit or a multi-year partnership.

The Method

The five-phase process for every engagement.

A structured sequence for finding the real problem, aligning on what matters, and designing and building the solution, without losing anything in translation. The format flexes. The method doesn't.

The Engine

The AI infrastructure that powers every phase.

A custom-built multi-agent AI system designed for consulting work. It's why one practitioner can go deeper in research, iterate further in design, and carry context from one engagement into the next.

The Audit

Two weeks to find where your product is losing growth.

Two weeks to diagnose where your product is losing growth and deliver a prioritised roadmap. The natural place to start — and the entry point into the full method.
Services

From strategy to implementation

Product Strategy
"Align your product with what drives growth." Connect design decisions to business outcomes, roadmap prioritisation, positioning, what to build first and why with what drives growth.
UX Research
"Understand the real problem before solving it." Interviews, journey mapping, competitive analysis. The goal isn't more data, it's the right diagnosis.
UX/UI Design
Make complex products obvious to use. The core of everything I do. Interface design, interaction patterns, information architecture, turning complexity into experiences users understand immediately. Obvious is harder than clever.
Design Systems
"Consistent, scalable, built to last." Component libraries, design tokens, governance. Not a UI kit, the operating system for how your product scales.
Build & Ship
"From concept to live product." I stay involved through implementation. The gap between design intent and what actually ships is where most value gets lost. I close it.
Monitor and scale
"Measure impact, iterate, and grow over time." Post-launch analytics, iterative improvements. Design isn't done when it ships, it's done when it compounds.
About me

I care about two things: improving people's lives and driving business growth.

Founders come to me when something isn't working and nobody can name it. I find it. Then I design and build the solution, from strategy to shipped product. 17 years across advertising, UX, and product design means the diagnosis goes deep.
About me
Strategic depth
Business fluency, product thinking, 17 years in the room where decisions get made.
AI-built consulting infrastructure
Trained AI specialists in research, strategy, design, and implementation, all orchestrated through human experience.
Adrien Castelain - Product Design Consultant working with clients during a workshop
Project phase
Discovery audit
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Strategy
Implementation
Deployment
Monitoring
Testimonials

In their words.

Adrien brings rare strategic clarity to experience design. He defined how our hardware and software needed to interact as one.
Bill Knight
Creative Director, Versed
Dan Rutter — CEO at Digital Surge
Adrien has proven to be an exceptional product consultant. His attention to detail and innovative designs have significantly improved our user experience.
Nick Roskam — CTO at SAV.com
Nick Roskam
CTO at SAV
Adrien has provided a collaborative approach to design which has revolutionised our customer experience. The final product speaks for itself.
Dan Rutter
Co-Founder, Digital Surge
Dan Rutter — CEO at Digital Surge

Your product won't get simpler on its own.

Two weeks to diagnose where your product is losing growth.