Founder and CEO

Tallybook · Lisbon

Built an invoicing and payment-reminder service for freelancers from one paid plan to 20,000+ paying customers and $2.1M in annual revenue, with a team of nine and no outside investment.

Co-founder, product and operations

Paperweight · Lisbon

Co-founded a paid note-taking app for university students with Tomás Reis; grew it to 38,000 paying users and led the sale to Northfold in 2019.

Founder

Quietdesk · Vienna

Designed, built and sold a paid focus timer for desktop computers; closed it after a year and wrote up what went wrong.

Billing analyst

Danubia Freight · Vienna

Rebuilt the payment process for about 200 self-employed drivers, cutting the average time from delivery to payment from 41 days to 12.

B.A. Economics

Department of Economics, Budapest · Budapest

Thesis on late payment among small suppliers in the Hungarian printing trade.

Profit Is a Feature (book, 2024)

Notes on running a software company without investors, revised from The Small Ledger; about 11,000 copies sold in its first year.

The Small Ledger (newsletter, 2020-present)

A monthly letter on pricing, hiring and cash flow for small software companies; about 24,000 subscribers.

Forty small companies to watch

Makers Quarterly (Tallybook)

Charging from day one, again

Kettle & Code podcast, episode 140

The price page is the product

Receipt Club, Lisbon