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About

Bitcoin proved it. Now productized.

Independent senior engineer shipping productized builds on fixed-price, fixed-timeline terms. Four years of production Bitcoin — Pizza Ninjas (Sotheby's-auctioned Ordinals), Pizza Pets (1M+ on-chain interactions), and OrdinalsBot — taught me to ship under pressure. Same discipline now goes into $490 Landings, $990 AI Pilots, $1,990 WhatsApp Bots, and $6,500 Sprints.

2015

Chapter One · Before tech

The unconventional path.

No classroom ever fit how I learned.

David Dacruz in his early career
It was all a dream

I never went to high school. Not because I couldn't do it — it just wasn't built for how I learn, so I walked out at 15 and never looked back. Instead I worked. Gardener, odd jobs, small ventures. Every role taught me something real about shipping, customers, and finishing what you start.

Then I found code. Taught myself through Google, YouTube, and relentless trial and error — no bootcamp, no mentor, just a laptop and stubbornness. It was the first thing that actually fit. I just needed a place that worked the same way I did.

2017

Chapter Two · Foundation

42 Paris changed how I think.

42 was the first place that clicked. No teachers. No lectures. No grades. Just problems, peers, and the hard stuff — C, algorithms, networking, systems. You learn by breaking things and rebuilding them with the person next to you.

I thrived there, and they kept me on — invited me to join the 42 Network dev team, building the tools students and staff use every day. 42 doesn't teach you to code. It teaches you how to learn to learn. More on what 42 actually is →

Alongside the code, I picked up a Design Thinker certificate at 42 — because good software is a design problem before it's an engineering one.

David Dacruz — student at 42 Paris
Me — 42 Paris, the cluster days
42 teaches you how to learn to learn.
42 School Paris campus — the cluster
42 Paris — Google is your friend
2020

Chapter Three · Building from zero

42 Lisboa. Portugal begins.

The 42 Lisboa founding team
42 Lisboa founding team · Day one

When the opportunity came to help launch 42 in Lisbon, I didn't hesitate. I was hired from France as part of the founding dev team — building the systems, tools, and infrastructure from day one.

I learned that great products aren't just great code — they're the right systems, the right culture, and the right people aligned around a vision that actually makes sense.

2021

Chapter Four · Web3 & Bitcoin

Shipping on Bitcoin through every cycle.

Went freelance in 2021 and dove straight into web3. Tokenomics, DeFi architecture, smart contracts, go-to-market — through every narrative shift and every market condition. When the Runes protocol launched on Bitcoin's halving block (840,000), I inscribed a rune token on that first block.

Then Bitcoin Ordinals happened and the work got real. I was the Bitcoin developer and inscription engineer on Pizza Ninjas — a 1,500-piece Bitcoin-native PFP collection that went from zero to Sotheby's. "The Angel" sold for $139,700. Blue-chip status followed. Then Pizza Pets: the first on-chain pets game on Bitcoin, a deflationary survival game that crossed a million feeding interactions in its first season.

From late 2024 through early 2025 I joined OrdinalsBot as senior frontend engineer — launched Trio, the Bitcoin-native marketplace, with the team, and was the dev on the inscription pipeline for WikiLeaks' Project Spartacus: 76,911 Afghan War Log files permanently inscribed on Bitcoin via Ordinals.

The bear market taught me how to build things that survive when the hype disappears. Most people left. I stayed and kept shipping.

2025 — now

Chapter Five · What's next

AI, Ericeira, and what's next.

By 2025 AI stopped being a buzzword — it became inevitable. I'd seen this movie before with crypto: the ones who build seriously while everyone else is still posting threads end up defining the space. So I moved early.

Now I work from Ericeira. A surf town on the Atlantic where the pace is slower but the thinking is clearer. I didn't take the usual path to get here. I'm not planning to take the usual one from here either. I just build.

David Dacruz — digital architect in Ericeira
Still building
Build.Break.Fix.Repeat.

Toolkit

Engineering

TypeScript · JavaScript · Vue / Nuxt · React / Next.js · Node.js · Python · Solidity · C / C++

Infrastructure

Git / GitHub · Docker · AWS · Vercel · Netlify · Linux · CI/CD

Web3 & Blockchain

DeFi Architecture · Smart Contracts · Tokenomics · Go-to-Market · Community Strategy

AI & Automation

Agentic Workflows · LLM Integration · Prompt Engineering · n8n · Make

SEO & Growth

Technical SEO · Structured Data · Core Web Vitals · Analytics · Conversion

Design & Product

Figma · UX Design · System Design · Product Strategy · Wireframing

Leadership

Team Leadership · Roadmapping · Stakeholder Management · Mentorship · Hiring

How I work

Self-directed · Strategic thinking · Founder empathy · Clear communicator · Adaptable

Free download · 6 pages · PDF

10 AI workflows that actually save hours.

Real agentic workflows running in production — not prompt packs. Stacks, costs, and failure modes from projects that shipped.

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