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3 editions attended.

On stage.

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talk · Berlin 2026

Building a Bitcoin POS With Merchants, Not For Them

A field report from building Numo, an open-source Bitcoin tap to pay POS. This talk walks through the feedback loop: how testimonials, feedback, feature requests drove priority, how we approached user testing, where merchant needs diverged from developer assumptions, and what a merchant first UX actually demands.

30m agenda
talk · Riga 2025

The state of ecash design: progress, risks, and what’s ahead.

The state of ecashdesin : progress, risks, and what’s ahead. Over the past few years, Cashu has gone from an experimental concept to a growing ecosystem. I want to highlight the major development breakthroughs that helped get us here, the problems we’re still solving, and what might be coming next. I’ll go over stuff like: How people are finding mints (and how tools like bitcoinmints.com + Nostr are helping) What wallets are doing to help users avoid getting rugged How we’re starting to show mint reliability through things like the mint auditor Some newer, more experimental features like multinut payments, mint authorization, and NIP 60 wallets, It’s basically a look at what’s been figured out, what’s still messy, and what’s coming next, from the perspective of a designer who is working on this day-to-day.

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