Onchain since 2019 · Ex-Coinbase
A complete first product or the next feature. Design, build, test, deploy, and hand off. You own the code. Product builds are scoped separately from the feature-sprint prices below.
1 founding-rate sprint remains across all build offers.
$ agent.execute --policy=spend-cap
14:22:01AGENTintent: swap 250 USDC → ETH on Base
14:22:01GUARDpolicy check: daily cap $1,000 — ok
14:22:02WALLETsigned via CDP smart wallet
14:22:04CHAINtx 0x9f…3a confirmed · block 21,847,412
14:22:04AUDITlogged · reversible · human-approved
status: shipped to production in 11 days▍
Experience and ecosystem
Onchain product development
An onchain product development sprint is a fixed-scope engagement that ships one wallet, payment, smart-contract, or AI-agent capability into a production product.
This 10-working-day sprint covers the customer path, protocol integration, transaction safety, tests, observability, deployment, and handoff for one bounded outcome. It is for teams that already know what users need and want senior implementation without an open-ended agency build.
Policy checks, spend limits, approvals, transaction execution, and an inspectable audit trail.
One end-to-end payment path with retries, confirmation states, tests, and operating notes.
A customer-facing Base or Optimism flow with gas handling, failure recovery, and release evidence.
The offer
2 weeks · fixed price · one shipped feature · you own the code
Give an AI agent a wallet and safe onchain execution via Coinbase AgentKit and the CDP SDK — spend limits, policy checks, and an audit log.
Add x402 micropayments or USDC payment rails to an existing product. Wired, tested, reversible.
Smart-wallet onboarding, gasless transactions, and a Solidity contract wired through OnchainKit.
Turn a half-working Cursor or Bolt onchain prototype into a tested feature that won’t lose funds.
How it works
Free, no deposit. Tell me the product you want to build or the feature you want shipped. I will tell you straight what fits a two-week build.
A 10% deposit reserves the founding price, not a start date, and is credited in full. One-page scope and one acceptance criterion. Another 40% is due only after you accept the SOW and date.
I ship it solo on a hard deadline, with tests and adversarial-input checks.
Production code, tests, and a handoff doc. You own all of it. Retainer optional.
What it costs
Agentic Onchain Sprint
$18,000
One shared founding-rate slot at $12,000
10 working days · one shipped feature · you own all the code
Security hardening
+$3,000
Sprint add-on
Audit-prep pass: adversarial review, key handling, gas and edge cases
Fractional CTO
$12,000/mo
$10,000 founding first month; then $12,000/mo by agreement
Ongoing ownership of onchain and AI technical decisions, month to month
How it worksWhy me
I spent three years as an engineer at Coinbase (2019–2022), and I work as a fractional CTO for teams shipping onchain and AI products. I build on the exact frontier your investors keep asking about — agents with wallets — and I ship fast. You do not have to take that on faith: every sprint is one written acceptance criterion, a day-5 vertical slice you can run yourself, release evidence, and a 14-day defect warranty on code your team owns.
One senior builder from scope through production handoff. No agency relay, anonymous team, or portfolio theater.
Book 15 minutes and get a straight answer on fit and price. The deposit comes after the call, never before it.
Written path
Name the user path, protocol boundary, deadline, and assets that exist today. You will get a written fit response before any deposit decision.