Whenever you're ready, walk me through how you'd approach this.
Develop a real-time transaction management system
Clarify the transaction lifecycle and decision outcomes, then design an end-to-end system that can ingest transaction events, evaluate risk or policy signals, make real-time decisions, and record outcomes for later analysis and model improvement. Address online serving, offline processing, data quality, evaluation, monitoring, and failure handling. State assumptions explicitly where scale, latency, or regulatory requirements are unspecified.