01 / The idea
A higher standard, in a fraction of the time.
For the last eighteen months, Evangelos has changed how the work gets built. The same custom websites, products, and systems, made to a higher standard, in a fraction of the time.
The change is a deliberate use of AI. Not a chatbot, and not a shortcut that ships something generic. Deep, scheduled workflows that take on the slow, mechanical parts, so the time goes where it matters: the decisions, the details, the things only judgment can get right.
You can see it in the work. Daras Dental had an old, tired website, rebuilt completely in two weeks, and built to last. The portfolio for Magnum photographer Nikos Economopoulos was built the same way. At Pnoe, the Precision platform has run on this approach for a year and a half.
Fast on its own is a commodity. Fast and custom and genuinely good, at the same time, is the point.
- The decisions
- The details
- What only judgment gets right
- Builds and checks
- Image pipelines
- SEO and performance audits
- First drafts
02 / AI for your work
AI that already knows your job.
Most people meet AI as a chat window. You open it, re-explain who you are, paste in your context, and start over tomorrow. It never learns your job.
We build the opposite: a setup that already knows your work, your tools, and your voice, and runs on a command. The tasks that used to take an afternoon take minutes, and still sound like you. Built on Claude Code and agent tooling, around one person's real work.
See how it worksProduct owners
A rough idea becomes a written spec, in your team's format and your voice.
Marketing strategists
A campaign thought becomes on-brand drafts, ready to review instead of write.
Business analysts
A new project becomes a structured analysis, run with the same commands every time.
Founders & small teams
The repeatable knowledge work stops eating your week.
03 / Selected work
Pnoe Precision
AI architecture & engineering
Pnoe turns a 10-minute breath test into a lab-grade read on your metabolism. Evangelos is its chief engineer and AI architect: the Precision iOS app, the engines that build each person's nutrition and training plan, and the architecture underneath. The analyzer it runs on matched lab equipment at a correlation of 0.98 in peer-reviewed research, which is why it now runs inside Equinox and Four Seasons.
View project →TrueLifeAudio
Web
A storefront for handmade high-end amplifiers and the brands TrueLifeAudio distributes. Built to feel as considered as the equipment it sells: fast, quiet, and out of the way, so the products and the reviews carry the room.
View project →Nikos Economopoulos
Web
A portfolio and print shop for the Magnum photographer, built to disappear so the photographs are the only thing you look at.
View project →Daras Dental
Web
An old, dated site for a dental practice, rebuilt completely in two weeks. Custom, fast, and built to last.
View project →Evangelos Tzemis
Photography · personal
A photographer's portfolio and print shop for my own street and documentary work, the interface kept out of the way of the frames.
View project →04 / What we do
Custom websites
Designed and built around your work, with speed and SEO treated as part of the design, and a CMS so you edit your own site. Daras Dental was rebuilt completely in two weeks.
Explore websites →
AI for your work
A setup built around one person's job: their tools, their voice, the work they repeat. Product owners, marketing strategists, analysts, and founders run it with a command instead of living in a chat window.
See how it works →
Custom apps
Backend, frontend, and native iOS and Android, built as one piece. The conventions are enforced by machines, so the hours go to your product. Precision ships this way.
Explore apps →
The speed comes from how we use AI. The decisions that make the work good are still made by hand.
05 / Range · brands we imagined
We do not only build. We imagine brands too.
Same hand, two souls. Sando and Scoop share one island and sound nothing alike.
FYLY
Brand identity · with George Tsavalos
A six-month rebrand built around one idea: sailing with people who know you.
06 / How we work
Evangelos leads and builds every project himself. When the work needs a specialist, he brings in a trusted partner, only when it is actually needed.
The people below are the ones he works with. They join the work directly, with no layer of management in between.
07 / About
Evangelos Tzemis started Lemonroot in 2023, after years of making things in different mediums.
He studied computer science in Athens and Copenhagen, where his research on touch interaction was published and his thesis proposed a new way to sense pressure on a screen. At CERN he co-wrote a machine-learning library used to untangle scientific records. At Beat he was lead developer on his team during a redesign of the ride-hailing app. At Pnoe he is chief engineer and AI architect.
Before software, and still alongside it, there was other craft. He directed a dance production that toured France for six months and played to fifty thousand people. He produces and engineers music, with ten albums recorded. He photographs, and sells the work.
The thread is not the medium. It is the attention. Each discipline teaches the same lesson from a different angle: how a thing is made is what it becomes.
08 / Contact
If you are building something you want to come out specific, not generic, we should talk.
Six short questions. You get a useful direction before you share your contact details.
- 01Start with the result
- 02See the likely project shape
- 03Send it for a personal review