Engineering, in our words
Postmortems, architecture decisions, and trade-offs from shipping fintech infrastructure, stablecoin payment rails, Web3, and AI systems in production. Honest, occasionally opinionated.
Fintech·July 13, 2026·8 min readNanopayments: settling sub-cent agent payments
Nanopayments let agents settle USDC amounts smaller than a network fee. How batching, netting and fractional-cent accounting make sub-cent payments work.
Read post
Fintech·July 6, 2026·7 min readDouble-entry ledgers: the backbone of every fintech app
A double-entry ledger is the 500-year-old accounting model under every fintech app. How it works, the invariants that keep money correct, and why it matters.
Read post
Web3·June 29, 2026·8 min readUpgradeable smart contracts: proxy patterns, trade-offs
How upgradeable smart contracts work, the transparent, UUPS, and diamond proxy patterns, the storage collisions and admin-key risks, and when not to use them.
Read post
Fintech·June 22, 2026·9 min readPayment reconciliation: build an engine that survives
A practical guide to building a payment reconciliation engine that survives partial settlement files, PSP fees, and FX, plus the matching ladder it needs.
Read post
Web3·June 15, 2026·8 min readReal-world asset tokenization: architecture and trade-offs
A field guide to real-world asset tokenization architecture, the token standards, oracle and custody assumptions, and the trade-offs that decide if it works.
Read post
AI/ML·June 10, 2026·7 min readClaude Fable 5 and the long-horizon agent problem
Claude Fable 5 keeps agents coherent for hours, not minutes. What changed, why it matters for fintech automation, and where you still need a human gate.
Read post
AI/ML·June 5, 2026·12 min readAgentic payments: what x402, AP2 and MPP mean for builders
Four agentic payment standards launched in a year. What x402, Google AP2, Stripe MPP, and OpenAI's ACP each do, how they differ, and what you need to build.
Read post- Fintech·April 20, 2026·8 min read
Shipping stablecoin rails without the pain
What we learned launching a USDC-powered remittance corridor, settlement timing, custody trade-offs, and the boring infrastructure that makes it actually work.
Read post