Onchain since 2019 · Ex-Coinbase
I ship production AI agents and onchain features for crypto teams. In two weeks.
Fixed scope. Fixed price. One feature, shipped to production with tests and a handoff doc. You own all the code.
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
What is an onchain product development sprint?
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.
- 01
Agent wallet with guardrails
Policy checks, spend limits, approvals, transaction execution, and an inspectable audit trail.
- 02
USDC or x402 payments
One end-to-end payment path with retries, confirmation states, tests, and operating notes.
- 03
Smart-wallet or contract integration
A customer-facing Base or Optimism flow with gas handling, failure recovery, and release evidence.
The offer
The Agentic Onchain Sprint
2 weeks · fixed price · one shipped feature · you own the code
Agent wallet + guardrails
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.
Onchain payment rails
Add x402 micropayments or USDC payment rails to an existing product. Wired, tested, reversible.
Base / Optimism integration
Smart-wallet onboarding, gasless transactions, and a Solidity contract wired through OnchainKit.
Prototype to production
Turn a half-working Cursor or Bolt onchain prototype into a tested feature that won’t lose funds.
How it works
One call to a shipped feature
Book a 15-min scope call
Free, no deposit. Tell me the one feature you want shipped and I will tell you straight whether it is a clean two-week sprint.
Reserve + fixed SOW
A 10% deposit locks the founding price and start window, credited in full. One-page scope and one acceptance criterion. Another 40% is due only after you accept the SOW and date.
Two-week build
I ship it solo on a hard deadline, with tests and adversarial-input checks.
Ship + handoff
Production code, tests, and a handoff doc. You own all of it. Retainer optional.
What it costs
No hourly. No ambiguity.
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
One day a week
Ongoing ownership of onchain and AI technical decisions, month to month
How it worksWhy me
Crypto teams hire on trust, not portfolios.
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.
Got a feature stuck in prototype?
Book 15 minutes and get a straight answer on fit and price. The deposit comes after the call, never before it.