Banking & Payments
High-availability payment architecture for a banking institution
Legacy payment stack replaced with a fault-tolerant, PCI-DSS compliant platform — sub-80ms latency, go-live with no maintenance window.
Context
A bank operated a monolithic payment platform with processing latency exceeding 400ms at peak hours and recurring incidents during load spikes. PCI-DSS compliance was partial and the system could not be evolved without a service outage.
Challenge
Replace the production payment platform with no service interruption, achieve sub-80ms latency with 99.99% availability, and reach full PCI-DSS compliance — within a timeline constrained by the board.
Our approach
How we built it
Progressive legacy replacement via strangler fig pattern, with dual-stack routing enabling traffic cutover service by service. Event-driven architecture (Kafka) for decoupling and fault tolerance. Load testing integrated at each phase. Go-live with no maintenance window via progressive traffic migration.
Engagement model
Measured outcomes
< 80 ms
P99 latency in production
99.99%
Availability since go-live
PCI-DSS
Compliance achieved at go-live
Your project
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