A massive codebase, a clean user experience.
CleenUI is licensed source code for enterprise teams. The component library and the production codebase that ship with it are designed to remove the recurring 6–12 month "build the foundation" tax from B2B software — so your team can spend its engineering budget on what actually wins customers.
Five years of compression.
Internal toolkit begins
Started as a personal codebase to avoid rebuilding the same auth, i18n, and DataGrid plumbing on every consulting engagement and tech startup.
First license
A social content startup leveraged the codebase, shipping to production in record time.
Modules formalized
The module system reorganized 18 months of accumulated capability into the 14 modules that ship today.
Public release
CleenUI opens to direct purchase. AI module added. Storybook published.
Twenty-five years
of enterprise modernization.
Shawn Livermore is the architect behind CleenUI and the lead on every engagement. As a software architect, AI strategist, author, and consultant with 25+ years in tech, he leads enterprise modernization efforts, AI-native platforms, and startups backed by venture capital and accelerators.
Shawn has helped billion-dollar and Fortune 500 organizations navigate complex digital transformations — modernizing legacy systems, exiting mainframes, and building future-ready architecture. He's architected and launched large-scale enterprise platforms across fintech, banking, mortgage, tax, insurance, legal, energy, e-commerce, healthcare, pharma, automotive, logistics, and government — often as part of multi-year transformation efforts involving acquisitions, cloud migration, and full-stack redevelopment.
More recently, his focus has shifted toward helping organizations build and operationalize AI practices — advising mid-sized companies on identifying high-impact AI use cases, training internal teams, and designing systems that integrate AI models effectively for automation, insight generation, and product intelligence.
That perspective is encoded into CleenUI. Every architectural decision — the two-layer cache, the row-level data access, the dynamic translation system, the LLM abstraction — comes from a real production obstacle that someone, somewhere, experienced.
→ Shawn's central argument is captured in the vibe-coding paradox — nine stages, two trajectories.
Books by the Architect of CleenUI
Shawn is an Amazon top-10 bestselling author in business nonfiction, published by Wiley — the fifth-largest publisher in the United States.
Six principles
baked into the codebase.
You should own the source code
SaaS lock-in is a tax on your future. CleenUI is licensed, not subscribed. The repo is yours, forever.
Foundations should be opinionated
"Configurable" usually means "you decide." We've decided. You can override anything, but you don't have to start from zero.
Architecture beats frameworks
We don't chase frameworks. We choose the right primitives — Dapper, Auth0, Redis, React — and integrate them properly.
The boring parts deserve craft
The DataGrid, the translation system, the role framework — these aren't glamorous. They're where most apps fall over. We obsess over them.
Onboarding is the product
Up to 30 days of architect engagement. You get the foundation and the person who built it. That's the deal.
Stay narrow, stay sharp
We don't build for everyone. CleenUI is for serious B2B applications with multi-tenant, internationalized, observable production requirements. If that's you, nobody fits better.
Talk to the architect, not a salesperson.
Every 30-minute architecture review is conducted by Shawn personally. No ridiculous sales funnel.