Payments infrastructure I have built and operate, and financial-services engineering under regulatory constraint. Money moving correctly is a measurement problem too.
A payment gateway built on Cloudflare Workers, pairing Xero invoice validation with NAB Unified Checkout to cut transaction fees for small businesses. An invoice is validated against Xero before payment is accepted, so the money and the books agree by construction rather than by reconciliation.
In production with its first client.
I built and have operated robotcombatevents.com since 2017: a Rails platform serving the global combat-robotics community, handling event registration and entry fees through Stripe Connect so organisers are paid directly.
Nine years in production, which is its own kind of credential — payouts, refunds, disputes and tax handling across many jurisdictions, run by one person.
Consulting through DiUS on an Iress financial-services platform, I built microservices for Design and Distribution Obligations compliance reporting, and migrated legacy applications to AWS (S3, Lambda, EC2, Route 53). React, Python, Docker, Terraform.
An event-sourced translation service automating frontend localisation on merge to master, and helping introduce Hypothesis Driven Development on Envato Elements — contributing to a 50% conversion-rate increase over eight months.