Modernising a payments platform without stopping the business
A regulated fintech needed to replatform core services while keeping audit trails intact and releases predictable.
The challenge
Legacy services were tightly coupled, deployments were manual, and compliance reviews slowed every release. Leadership needed a path to cloud-native architecture without a risky big-bang cutover.
How we approached it
Map what cannot break
Mapped critical payment flows and isolated the highest-risk modules for phased migration.
Automate with audit in mind
Introduced CI/CD, environment promotion, and infrastructure-as-code with audit-friendly change logs.
Validate beside production
Ran dual-write and shadow traffic patterns so new services could be validated beside production.
Hand over operations cleanly
Embedded observability and runbooks so operations could own the platform after handover.
Outcomes
Predictable releases
Releases moved from quarterly batches to weekly cadence with rollback paths.
Regulator-ready controls
Audit-ready documentation and access controls satisfied regulator review.
Safe cutover
Core transaction services migrated with no unplanned downtime during cutover windows.
Technologies involved
- React
- Node.js
- PostgreSQL
- AWS
- Docker
- Kubernetes
- GitHub Actions
In their words
“Agam delivered our platform modernization on scope, on time, and with audit-ready documentation.”