Backend systems, built to be trusted.

Delta ingestion, queue-buffered writes and read-replica clustering that keep search instant while millions of listings change underneath it.

AI-synthesised exam content that stays quarantined until a human domain expert signs it off — then reaches candidates through sub-20ms typo-tolerant search.

A resident daemon that replaces brittle cron jobs, then sizes every position against the asset's own volatility before anything is dispatched.

Commands and queries kept apart all the way down to the payment API — the same CQRS split as Case 02, in a domain where a mistake moves real money.

A Go daemon that pulls in parallel, remuxes streams in memory without a lossy re-encode, and picks up exactly where a broken transfer stopped.