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I'm Dennis and my goal is to help improving the UX/UI of Bitcoin-related projects.
Currently I'm working full-time on BTCPay Server – an open-source, self-hosted payment processor for Bitcoin.

If you want to donate via bitcoin, please visit my bitcoin donation page.

BTCPay Server

At BTCPay Server I help with mostly UI related feature development like the wallet setup redesign or improving several sections of the app. I am also maintaining the technical side of the official BTCPay Server documentation and improving the content of the docs. If you are curious: I've written a detailed post about migrating the docs from GitBook to Vuepress and the thoughts behind this.

JAM - JoinMarket Web UI

A web UI for JoinMarket with a focus on user-friendliness. The UI aims to provide sensible defaults and be easy to use for beginners while still providing the features advanced users expect. We're aiming to make the JoinMarket Web UI available for different node systems.


Started as a podcast, this became a hub and platform for the german-speaking Bitcoin community: Einundzwanzig publishes multiple podcast shows a week and our YouTube channel features lots of video tutorials. We organize events like the Bitcoin Zitadelle and have sparked 30+ meetups in Germany, Austria and Switzerland.


The UIengine is a workbench for UI-driven development: A tool for developers and designers to build and document web sites and apps. I develop and maintain the project and we are also using it to document the BTCPay Server Design System.


The RaspiBlitz is a Bitcoin and Lightning node, which runs on a Raspberry Pi. I'm a delighted user myself and have come to love the platform for building on it: That's why I've added my stacking-sats-kraken script and kindle-display server as bonus scripts to the RaspiBlitz. Especially the kindle display was well received and I love seeing people spin up their own instances.


18 sponsors are funding dennisreimann’s work.


When I started to work on open source full-time in April 2020 my goal was to find out how to make all of this viable and sustainable. $2500 per month would allow me to cover my fixed costs, which would be awesome.


Featured work

  1. btcpayserver/btcpayserver

    Accept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor.

  2. joinmarket-webui/jam

    Your sats. Your privacy. Your profit.

    JavaScript 87
  3. Einundzwanzig-Podcast/

    Einundzwanzig Podcast Website

    Pug 14
  4. dennisreimann/

    Support bitcoin developers so they can focus on building our future.

    CSS 56
  5. dennisreimann/uiengine

    Workbench for UI-driven development

    JavaScript 357
  6. dennisreimann/kindle-display

    Kindle Status Display

    CSS 48

14% towards $2,500 per month goal

@Kukks @jlopp
@tylerspalding @PatrickZGW @MarkusTurm @dergigi @fabthefoxx

Kukks and 17 others sponsor this goal

Select a tier

$ a month

Choose a custom amount.

$2 a month


Thanks 🌱

$5 a month


Pays my coffee ☕️

$10 a month


Feeds our cat 🐈

$20 a month


Feeds our dog 🐕

$50 a month


Even though that seems too generous, I highly appreciate your faith in my work 💸

$100 a month


You need my help sometimes and want the opportunity to reach out? Here we go 👯