Side projects · 2026

Three things I built
because I wanted to use them.

Not demos. Each one is live, each one solves a problem I actually had, and each is careful about the same thing: saying where its numbers come from, and admitting when it does not know.

InvestFriends

Friends compare how their investing is going — as percentages, never amounts.

  • A private circle shows everyone's progress on one scale, so a first savings plan sits beside a twenty-year portfolio without either being embarrassing.
  • Nobody ever learns what anybody holds, paid, or is worth. That is enforced by what the app stores, not by everyone being polite.
  • Imports a CSV straight from Trade Republic or finanzen.net ZERO, resolves each ISIN to a live price, and fills in dividends on its own.
Live
since 18 Aug 2026
Built with
Next.js 16 · Clerk · Drizzle + Neon · next-intl · Vitest + Playwright

Working title — the name is provisional

Open InvestFriends
  • A circle chart in dark mode showing four members' returns as percentage lines over a year, with a feed of buys and sells beneath it.

    An example circle — invented friends, real prices

Fairground

What a company is worth, on assumptions you set yourself.

  • Four valuation models run side by side and are never averaged into one number — where they disagree is the answer worth having.
  • Growth, margins, cost of capital and holding period are all yours to change, and every figure moves as you type.
  • A model that cannot price a company is greyed out with the reason. Nothing is guessed to fill a gap.
Live
since 13 Aug 2026
Built with
Next.js · Drizzle + Neon · SEC EDGAR filings · end-of-day prices

Personal learning project — not investment advice

Open Fairground
  • A stock page for Apple: four valuation models each with its own verdict and reasoning, beside the range of what they say the company is worth.

    Four models, four verdicts, one set of assumptions

Product Role Navigator

The same job title covers very different work. This says which work.

  • Describes what product roles in software actually involve, across eight areas of skill and twelve reference roles.
  • Rate a role you are hiring for, or paste an advert and put your own profile beside it to see exactly where the two diverge.
  • Every number states its source — quoted, reference, derived, or edited by you — and says plainly when something was never stated at all.
Live
since 12 Aug 2026
Built with
One standalone HTML file · no backend · UK GDS capability framework

Seven axes quote GDS; the eighth is authored and marked as such

Open the Navigator
  • The opening screen, offering to rate a role you are hiring for or to analyse a job advert.

    Two ways in: hiring for a role, or sizing one up