We’re a stealth-mode Bitcoin company, focused on researching, designing, and developing applications that leverage Bitcoin and P2P networks to create an independent alternative digital economy where users can operate in a self-sovereign, user-centric paradigm.

We are creating platforms to incentivize and facilitate Bitcoin adoption, self-custody, digital autonomy, and circular economy…


We’re a stealth-mode Bitcoin company, focused on researching, designing, and developing applications that leverage Bitcoin and P2P networks to create an alternative digital economy.

We are creating platforms to incentivize and facilitate Bitcoin adoption, self-custody, digital autonomy, and circular economy by providing new utility to Bitcoin users.

Senior NodeJS Engineer

  • Contract type: Full-time

with John Carvalho

A New Bitcoin Podcast Experiment: The Biz

Today, we launched a new podcast series called The Biz. On the surface, many people will see it as just another Bitcoin podcast, but this post will give some insight as to what makes it novel.

Specifically, I’ll explain the content, the monetization, and the technology behind The Biz.

The Content: Bitcoin Builders

I’ve…


What’s in the blocks?

Units of Trust vs. Units of Work

We have concepts of money, currency, store of value, credit, IOU, commodity, etc. Each is an abstraction of how we measure value together, and the tools we use to express that value.

In hindsight, fiat mostly functions as a unit of trust. It is centrally issued and its issuance and…


Last week was my final week at Bitrefill. Throughout the past year, I did my very best to help grow their brand, product, partners, team, and revenue.

Bitrefill, and I as well, had our best year so far:

  • We added literally thousands of new brands of gift cards and refills…

This was originally posted at Bitcoin Magazine on May 21, 2019.

To Bitcoin or Not to Bitcoin

During the “scaling debate” before the SegWit2X user-activated soft fork (UASF), Bitcoin businesses were getting their first bitter taste of Bitcoin’s censorship resistance. They wanted change to be easier. They wanted their influence to be effective. They wanted to…


When a person receives rare information, he may utilize it, curate it, arbitrage it, or discard it. Those wishing to arbitrage ignorance about Bitcoin are assuming the role of The Greatest Fool.

Armed with his charm and his heavy bag of shitcoins, he led the lads to the ledge.

The Greatest Fool is racing against the propagation of best-information & understanding in hopes of selling counterfeit opportunities…


The Gates of Bitcoin don’t actually exist. They are an imaginary construction that exists only in the minds of those that are a slave to those that imagined it.

As a permissionless, censorship-resistant system anyone is welcome to come and go as they please, no matter which role they choose…


It is no secret that Vitalik Buterin likes complexity. While I am surely not qualified to get into the crypto-nitty-gritty, I have a certain knack for distilling concepts into digestible morsels. In this post, I will attempt to break down his most recent offering: Base Layers And Functionality Escape Velocity


Surprisingly, 10 years after Bitcoin’s creation, most people still don’t know the correct answer to this question:

44% of respondents understand Bitcoin.

I assure you, there is a single correct answer.

Understanding of Bitcoin behaves like a moving target while we are still in the early adoption phase. It takes years to understand Bitcoin, and…

John Carvalho

Bitcoin Game Theory & Strategy

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