Case studies of systems I designed and shipped — payments, messaging, offline mobile, and AI features with real retrieval behind them.
The four systems that best show how I work: hard constraints, clear architecture, and something running.
BalloAds previewAn advertising and messaging platform that speaks SMPP to a mobile network directly
RoleTechnical strategy and architecture, plus backend implementation across messaging, audiences, billing and access control. I lead the team building it.
Live · Case study →
One AI service for a whole product suite, behind ports rather than SDK calls
RoleArchitecture and implementation.
Live · Case study →
Octo previewEvent ticketing for venues where the network drops exactly when you need it
RoleArchitecture and backend implementation — payments, ticket integrity, and the offline scan reconciliation model.
Live · Case study · 3 decision records →
A money app whose AI assistant can act on your finances but cannot quietly rewrite them
RoleArchitecture and implementation of the assistant's tool layer, the confirmation and staging model, and the row-level security boundary it runs inside.
Case study · 1 decision record →
Production SaaS and trading infrastructure that didn’t need a full featured slot.
2025 — 2026
Binary event markets with an automated market maker and a double-entry ledger underneath
Five reconciliation checks over one set of books, recomputed on every write
2026
Automated trading bots, and the risk limits that actually stop them
Substantial delivery that I can’t name in full — or whose hardest problems are already covered above.
Client onboarding through to payment: contracts with e-signature, invoicing, card payments, payroll with statutory deductions, and an append-only ledger with a full audit trail. Built for an employer; not named here.
A mobile-first marketplace for the Zambian market, pairing a storefront with community features that let buyers back local creators directly, plus a wallet service alongside it.
A retail storefront and the service behind it — catalogue, cart, checkout and order management. Client work, so not named.
The public site for the company I am CTO of, plus the CMS behind it and the back-office and CRM surfaces the team works in day to day.
