event-sourcing

Event Sourcing Under MiFID II: When the Complexity Pays for Itself

Regulators fined Wall Street firms $1.8 billion for missing records. Not fraud — records. Event sourcing is complex and expensive. It's also the best architecture to answer 'prove what happened' from the data itself.

Resilient by Design: What I Learned Building for Regulated Finance

Most engineers optimise for uptime. In regulated finance, that instinct will cost you. What I learned about failing hard, recovering deliberately, and building compliance into the architecture.