$490 Live in a Day · $1,990 WhatsApp Bot · $990 AI Pilot · $6,500 Sprint
Shipped live.
In days.
Small, fixed-price builds — live on your stack in days, not months. Start with a landing in a day, a WhatsApp bot in a week, or a production AI pilot in three. Live or refunded.
Track record · four credentials
Not a deck. Real shipped work with public outcomes.
- 01Case study
Sotheby's · December 2023
·$139,700
Pizza Ninjas — inscription #1 auctioned
Blue-chip Bitcoin Ordinals collection. The Angel sold at Sotheby's, publicly verifiable on-chain. Bitcoin developer and inscription engineer — led the full mint and on-chain pipeline.
- 02Case study
On-chain interactions
·1M+ feeds
Pizza Pets — first on-chain pets on Bitcoin
Core developer on the inscription stack, game-state engine, and multi-chain airdrop mechanics. Deflationary by design — dead pets burn forever.
- 03Case study
Co-founder · 2025
·EVA Online
Contextual Persistence Protocol with Paul Jenkins
AI agent with on-chain memory built with Marvel writer Paul Jenkins. $EVA on Virtuals/Base, bonding-curve launch graduated to Uniswap V2.
- 04About 42
Education
·42 · Paris + Lisboa
Alumnus and founding team of 42 Lisboa
Peer-learning, project-based CS at the highest bar in Europe. Helped launch the Portuguese campus; trained hundreds of developers.
Also: Fractional CTO on Side.xyz (three-axis pivot, 2023) · Engrave Protocol MCP server · Project Spartacus (WikiLeaks archive inscribed on Bitcoin) · Trio Marketplace for OrdinalsBot. All case studies →
Primary · productized ladder
Small, productized.
Shipped live in days.
Fixed-price builds, live on your stack — not in a deck. Start at $490 and climb as the work earns its keep. AI Pilots credit forward into the Sprint if you go bigger. Live or refunded.
- 01
$490
1 day · live
Live in a Day
Landing page live on your domain before you sleep. Built with Claude, yours to keep.
- 02
$990
3 days · live
AI Pilot Workflow
One small AI automation shipped live. Credited toward the Sprint.
- 03
$1,990
1 week · live
WhatsApp AI Bot
Claude-powered bot on your WhatsApp Business number. Stop replying to the same ten questions.
- 04
$6,500
14 days · fixed
The AI Sprint
Full production AI workflow. Live by day 14 or refunded.
Deeper · when the work compounds
Programs, retainers, and team workshops.
- 01
From $18,000
8–12 weeks
Multi-Workflow Program
Three AI workflows sequenced for compounding ROI. 60-day post-launch support.
- 02
From $3,500/mo
Ongoing
AI Automation Retainer
Continuous build and tune across your automation stack. Scoped to automation work, not the CTO seat.
- 03
Quoted
½–1 day
Team Workshop
Private team session. Tool audits, workflow design, your team ships a working artifact.
Also — and selectively — Fractional CTO for pre-Series A founders, SEO & AI consulting, and Bitcoin engineering — the proof-of-work behind the productized offers (Pizza Ninjas, Pizza Pets, OrdinalsBot).
About
Not a typical developer story.
Taught myself to code with Google and YouTube before anyone gave me a chance. That led to 42 School in Paris — no teachers, no curriculum. Stayed on as staff, then helped build 42 Lisboa as part of the founding team.
Four years deep in Bitcoin (Pizza Ninjas, Pizza Pets, OrdinalsBot) taught me to ship under pressure on infrastructure that doesn't forgive. Same shipping discipline now goes into AI automation for SaaS — Pilots and Sprints, built from Ericeira.
Latest insights
From the blog.
How Much Does AI Automation Cost in 2026? The Honest Breakdown (USD, EUR, GBP, AUD)
Real pricing for AI automation projects in 2026. Build costs, monthly API and infra costs, consultant rates, and ROI math — with ranges in USD, EUR, GBP, and AUD for US, EU, UK, and Australian businesses.
How to Never Hit Claude's Session Limit Again: The Harness Discipline
A practical playbook for staying under Claude's session and usage limits — model routing, subagents, /clear discipline, and the daily rhythm that keeps Claude Code cheap, fast, and sharp without burning your weekly quota.
AI Automation for SaaS Companies: The 7 Workflows That Actually Move the Needle
The specific AI automations that move key SaaS metrics — support triage, churn detection, onboarding personalisation, expansion signals. Real examples with numbers from n SaaS companies.
David Dacruz
Replies in ~24h
Next step
You have an idea. I ship.
A handful of engagements at a time. If you're building something ambitious in AI, web3, or the real world — tell me about it. I'll come back with an honest take.