Patrick McKenzie

Patrick McKenzie sits at one of the stranger intersections in tech: he is a software engineer who writes better than most journalists, a marketer who thinks better than most engineers, and a fintech expert who explains ACH transfers and stablecoin rails in prose clear enough for a curious high school student. He is the person you want when something technically complex also happens to matter enormously.

Right now, he is writing. Specifically, he writes Bits about Money, a newsletter about the plumbing of financial systems - the clearinghouses, the payment rails, the fraud mechanics, the regulatory scaffolding that makes money move without anyone thinking too hard about it. It is one of the best-read fintech publications on the internet, and it reads like nothing else: part systems engineering breakdown, part financial history, part wry observation about how institutions actually work.

He is also an advisor at Stripe, where he spent six years as a full-time employee working on Stripe Atlas - the product that lets a founder in Lagos or Lagos or Warsaw incorporate a US company from their laptop. And he hosts Complex Systems, a weekly podcast about the technical and human factors underlying the infrastructure most people never think about until it breaks.

The handle is patio11. It has been patio11 since 1996, when he signed up for CompuServe and needed to disambiguate from other people who might also go by Patio - a nickname from a friend from Puerto Rico. He chose his favorite number. Thirty years later, the handle travels with him everywhere: Twitter, Hacker News, the internet's long memory. It is the kind of detail that tells you something about the man: consistent, idiosyncratic, and exactly the sort of footnote he would himself document at length.

After college, most American engineers go to San Francisco or Seattle. Patrick McKenzie went to Japan. For six years he worked as a Japanese salaryman - the specific, cultural, exhausting kind - while moonlighting on software. He moved to Japan not because of some grand entrepreneurial plan, but because that is what he did, and two decades later he is still there, having become one of the most knowledgeable English-language commentators on Japanese business, finance, and bureaucracy alive.

The first company he built during those years was Bingo Card Creator. A tool that let teachers print customized bingo cards. It sounds almost deliberately humble - and that is rather the point. The business was modest enough that he could understand it completely. It became a laboratory for every lesson he would later teach about SEO, conversion optimization, email marketing, and the quiet economics of software. He figured out that creating thousands of specific, narrow pages for specific searches could generate 50% of sales and 75% of profits. He figured out that a single automated email could produce a 20% upgrade rate. He wrote all of this down.

He left Japanese employment in 2010 and went full-time on his own. He built Appointment Reminder next - a Twilio-based service that called and texted dental patients to remind them of their appointments. Unglamorous, useful, profitable. The kind of business nobody tweets about because it doesn't have a compelling narrative, except that it worked, and he wrote about that too.

In early 2021, the COVID vaccine rollout was a disaster of coordination. Millions of doses were available. Millions of Americans wanted them. Nobody could reliably tell you where to go. Official systems were broken, incomplete, or weeks behind reality. Into this gap stepped Patrick McKenzie, who led an organization called VaccinateCA - which began in California and grew into a shadow national vaccine location database built by volunteers calling pharmacies by hand.

VaccinateCA is described, in retrospect, as probably saving a high four-figure number of lives. It was a real-world proof of a theory McKenzie had been writing about for fifteen years: that motivated, technically capable people working fast can outrun institutional inertia on timescales that actually matter. The official systems eventually caught up. The volunteers had already done the work.

He describes it as his proudest professional accomplishment. For a man who has generated millions of dollars in reader raises with a single essay and helped build the infrastructure that incorporated thousands of companies, that is a meaningful statement about where he thinks leverage actually lives.

McKenzie has been writing publicly since 2006. The essays accumulate like sediment: each one a specific, useful thing, and together a record of how someone thinks about software, business, money, and institutions over two decades of practice. He has written 4.7 million words. The count keeps climbing.

The most famous piece is the salary negotiation essay - a 4,000-word argument that engineers treat negotiation as a moral failing when it is actually a professional skill, and that the financial stakes are too enormous to be squeamish about. It was written in 2012. It still generates emails from readers every year, reporting raises that compound across job transitions. The running total of documented raises: $15 million and climbing. He tweets about the emails occasionally, with evident pleasure.

Then there is "Don't Call Yourself A Programmer" - career advice that is less about not using the word programmer and more about understanding that engineers solve business problems and should position themselves accordingly. And "Falsehoods Programmers Believe About Names," which started a genre of similar articles about the assumptions software quietly bakes in about the world.

Mark McGranaghan coined "Patio11's Law," which states: "The number of software businesses in the world is larger than you think, even after you've taken into account Patio11's Law." It is a joke about epistemic humility and a serious point about the invisibility of healthy, unglamorous software businesses. Most of them never appear in TechCrunch. Most of them serve dentists and property managers and school administrators, and most of them are quietly profitable, and McKenzie has been writing about this reality since before it became a startup culture talking point.

The law having his name attached to it is fitting. He has spent twenty years arguing that the interesting action in software is not always in the high-visibility companies, that leverage exists everywhere if you know where to look, and that the businesses nobody talks about are often the ones worth understanding. He understands this from the inside - he built those businesses, in Japan, at night, without venture capital, and wrote about every lesson in public.

The fintech space is full of people who understand finance and people who understand software. Very few of them understand both well enough to explain how the two collide. McKenzie does, partly because he has spent his career living in the collision zone - building software businesses, working inside one of the most important financial infrastructure companies in the world, writing tens of thousands of words about payment rails and regulatory frameworks and what a bank actually does when you send a wire.

What separates his writing from most technical journalism is that he does not simplify by removing complexity. He simplifies by choosing the right frame - finding the analogy or the structural insight that makes a confusing system suddenly legible. ACH is not just "how direct deposits work." It is a fifty-year-old system designed for a world of physical paper that has quietly become the backbone of modern US financial infrastructure, with all the accumulated weirdness that implies. McKenzie explains this without condescension and without obscurantism, and that combination is rarer than it should be.

He is also one of the internet's honest people about the mechanics of career progression. The salary negotiation essay exists because he watched smart engineers treat negotiation as vaguely shameful, leave money on the table, and then feel virtuous about it. His position is simple and correct: negotiation is a professional skill, the stakes are enormous, and being squeamish about it is a luxury most people cannot afford. Fifteen million dollars in documented reader raises suggests he was right.