Scaling a global payments platform without downtime.
A fast-growing payments provider partnered with Velinsa to re-architect a monolithic system into an event-driven platform that could support new markets and higher volumes without sacrificing compliance or reliability.
From monolith constraints to growth blocker
The client’s core payments engine was a single monolithic application deployed to a small number of regions. Each new feature increased complexity and slowed down releases, and the team struggled to support new products and regulatory changes.
- Release cycles of 6–8 weeks with coordinated “all-hands” deployments.
- Growing backlog of partner integrations and region-specific requirements.
- Limited visibility into transaction flows and failure modes.
Designing a resilient payments platform
- Define target architecture and migration strategy.
- Implement event-driven services around a central payments ledger.
- Introduce observability and incident management practices.
- Enable internal teams with patterns, playbooks, and training.
Phased migration that kept the business running.
Velinsa coordinated a phased cutover that reduced risk while delivering incremental value, starting with read-only shadow traffic and culminating in full blue/green releases.
Baseline & target state
Mapped current transaction flows, failure modes, and SLAs; defined target event-driven design.
Strangler services
Introduced edge services for authentication, routing, and idempotency without touching the core.
Event backbone
Implemented an event bus and ledger service, gradually moving critical workflows onto streams.
Cutover & optimisation
Rolled out blue/green deployments, tuned performance, and handed over with runbooks and training.