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Charlie Ellington.

Work.

What I'm building and tools. I also take on a select few client projects per year.

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Main Focus

Zebra Practice

OS for accountancy work.

The operating system for accountancy practices using AI. Built inside a fifteen-person practice; opening to new practices in 2027.

Website

Working with you

Design & Build Sprints

Designing and building critical user journeys and AI products, validated with real users.

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Built on the design process I've used with these teams.

Ethereum FoundationConsenSysRamp NetworkNexus MutualArbitrum

Selected work

AI diligence · Shipped in code

Research Tech

From API to investor-ready in four sprints. User testing led us from chat to structured evidence views.

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Research Tech AI diligence platform

Visual design · Animation

Ramp Network

Twelve motion spotlights in four days. A return to the team whose first product I designed in 2018.

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Your Balance
$100.00
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Earning 4.3% APY
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Client feedback

“I’m amazed. Unbelievable. Everything was done so fast and the quality of the insights from the user validation is incredible.”
BartoszCo-founder, Research Tech
“Shortest design cycle available on the market. Charlie is a master of communication, so working with him is not only very effective, but also a real pleasure.”
Szymon SypniewiczCo-founder of Ramp Network
More client feedback
“In a mere two weeks, they took a high-level concept and turned it into a visually stunning leaderboard app that delights our users. As a small, highly technical team, we found that because they were able to own all the design, UI/UX and front-end engineering related to the project, it allowed us to concentrate on back-end and data engineering, where our strengths lie.”
MikeCo-founder, Hummingbot
“We found Charlie by searching for the Ramp designer — we needed someone who actually understood fintech UX. His user testing caught what we never would have: users freezing on the first screen, not understanding why verification was needed. Insights that would have killed adoption. He delivered it all in production-ready code we could integrate directly — no Figma translation, no months of back-and-forth. His work was instrumental to securing our next round of funding.”
Philipp TothFounder, Paid247

Smaller things

History

First Chapters · Pre-2017

2013-2017

Yoga Retreat Company

Founded and scaled a yoga retreat company to €1.5M annual revenue. Learned everything about building a business from zero.

2008-2012

Teaching Sailing

My first 'job' was teaching sailing from a beach in Greece.

1989

Ocean Kid

On the ocean since I was eight, sailing, windsurfing, kitesurfing and later surfing.