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Fintech · Lumina

Scaled a payments platform to 5M transactions/day

Event-driven architecture on Kubernetes with full observability, hardened for compliance and burst traffic.

L
Fintech
5M/day
Transactions · Lumina
Client
Lumina
Industry
Fintech
Timeline
16 weeks
Year
2023
5M/day
Transactions
99.99%
Uptime
-45%
Cloud cost
The challenge

Lumina was scaling fast and their payments core couldn't keep up — spiky traffic caused timeouts, cloud costs were ballooning, and compliance audits were painful. One outage could mean lost licences.

GoKubernetesKafkaTerraformGrafana
How we approached it
  1. 01

    Re-designed the core as an event-driven system on Kubernetes with autoscaling.

  2. 02

    Introduced full observability — tracing, metrics and alerting — across every service.

  3. 03

    Hardened the platform for PCI-style compliance with audit trails baked in.

  4. 04

    Right-sized infrastructure and added spot capacity to cut cost without risk.

The outcome

The platform now clears 5M transactions a day at 99.99% uptime while cloud spend fell 45%. Audits went from weeks of scramble to a few clicks.

They made our payments platform boring — in the best way. It just works, at any scale, and costs less.
CTO · Lumina
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