UK FPS AWS Architecture Guide

TL;DR: Payments infrastructure is more than just APIs and retries. If you can’t trace the lifecycle of a single transaction, you risk losing customer trust, failing audits, and slowing down product velocity.

In this post, I dive into why every modern fintech needs a robust control plane and how to start building one using our open-source blueprint.

Why Fintechs Hit the Same Infrastructure Roadblock

Fast-growing fintechs often launch with well-designed APIs and a smooth user experience. But as transaction volumes increase and edge cases multiply, predictable issues emerge:

Payments get stuck in unknown states

Support teams struggle to explain what happened

Engineers get called at 2 AM without the right context

Audits fail due to missing event trails

Refunds drag on, frustrating customers

Why does this happen? Because most teams focus on building the data plane—the part that executes payments—but overlook the control plane, which governs, tracks, and secures the payment flows.

What Is a Control Plane in Fintech?

Borrowing from cloud infrastructure terminology:

The data plane performs the actual processing.

The control plane manages orchestration, state transitions, and enforcement of rules.

In fintech, a control plane:

Orchestrates payment state transitions

Captures retries, approvals, and failures

Provides comprehensive audit trails

Offers business-centric observability (e.g., “Where is payment ID 123xyz and why is it pending?”)

Embeds regulatory compliance into system behavior

Without a control plane, you’re essentially running sensitive batch processes with blindfolds on.

What You Need (But Probably Don’t Have Yet)

Building a true control plane requires:

Stateful orchestration (AWS Step Functions)

Event stream visibility (EventBridge, Kafka, SNS)

Correlated observability (logs, metrics, and traces tied to payment IDs)

Automated compliance hooks (IAM audits, PII redaction, encryption at rest and in transit)

Region-aware failover and partitioning

Sounds complex? That’s because it is.

That’s why I created and open-sourced—a ready-to-use infrastructure blueprint to get you 80% of the way there

Let’s Build Together

Have feedback? Suggestions? Want to contribute to the blueprint?

Drop a GitHub issue, comment here, or join our cloud fintech builders channel (coming soon).

And if you’re a CTO, CPO, or lead engineer navigating cloud architecture for high-trust systems — our invite-only CEO Cloud Strategy Partnership is now accepting Q3 members. Apply here.