Northwind Pay
A unified payments platform processing cross-border transfers in 30+ currencies, rebuilt on an event-driven core for sub-second settlement.
Northwind Financial needed to consolidate four aging payment systems into one platform that could settle cross-border transfers instantly and scale with their global expansion.
The challenge
Their legacy stack settled payments in batches, sometimes taking days, and couldn't handle concurrent load during peak windows. Two prior vendors had failed to deliver a working replacement in over two years. Compliance and auditability were non-negotiable.
Our approach
- 1
Re-architected the core around an event-driven ledger with an immutable audit trail.
- 2
Introduced idempotent, exactly-once processing to eliminate double-spends under load.
- 3
Built a real-time FX engine supporting 30+ currencies with mid-market pricing.
- 4
Rolled out gradually behind feature flags with zero-downtime data migration.
The results
HEXAVO rebuilt our payments core in four months — something two prior vendors failed to deliver in two years. Settlement is now instant.
- Client
- Northwind Financial
- Industry
- Fintech
- Year
- 2025
- Duration
- 5 months
- Cloud & DevOps
- Custom Software
- Data Engineering
- Next.js
- Go
- PostgreSQL
- Kafka
- AWS
- Terraform
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