Builder
of small
useful things.
John W. Harris — a one-person studio shipping a few software products, a longevity practice, and a monthly letter on the slow variables. Built like a building: drawn first, framed slowly, finished well.
Studio
elevation.
Scale 1:50 · plan viewThe studio is one desk and a small backlog. I keep a portfolio of work — software, writing, a longevity practice — because the interesting questions live at the seams between them.
I work the way I'd frame a house: drawn first, dimensioned, then framed slowly. Most of what you see here was sketched in a notebook for a year before it shipped. I prefer small bets that improve with time.
The work is unscaled, on purpose. A few seats. A few products. One letter. If that's the kind of thing you like, the letter at the bottom is the best way to follow along.
Plan view —
ventures.
06 lots · 03 occupied · 03 framedLightweight SaaS for clinicians: structured intake, lab review, and care plans patients can actually read. Built for small practices that don't need an enterprise EHR.
A monthly letter on healthspan, the slow variables, and the books and papers worth your time.
A reference site for common longevity labs — what they mean, what they don't, and how clinicians read them.
Small cash-pay longevity practice. 8 seats. Long visits.
A short book on healthspan, drafted in the open. Out 2027.
Small checks into health & dev-tool teams I want to learn from.
Specification —
writing.
Last 30 · sorted by dateField guide —
the long arc.
Free PDF · 32 pp · signed linkA short field guide to the small set of variables that, when tended for decades, do most of the work. Drawn from the clinic, the literature, and the books I keep coming back to.
- N.01What 'healthspan' actually means once you strip the marketing.
- N.02The five slow variables that compound over decades.
- N.03A reading list — short, opinionated, mostly free.
One letter,
once a month.
Notes from the studio: what I'm drawing, what I'm framing, and the one or two things I learned at the bedside that month. Plain text. No noise.