Payment Processing Pipeline
Reference architecture for payment processing covering checkout, webhooks, reconciliation, refunds, and accounting integration.
Components
Considerations
Alternatives
Complexity
Fit
When this blueprint fits
And when to walk away from it
When to use this
Payments are core to the product and you handle enough volume that reconciliation, refunds, and accounting integration need to be reliable not best-effort. Marketplaces, subscription products, and financial services all live here.
When NOT to use this
If your only payment surface is a single Stripe Checkout link and a once-a-month export, the lightweight integration is fine. This blueprint is for teams where payment correctness is part of the product.
Architecture
System components
Key building blocks of this architecture, layered from infrastructure up.
Checkout Service
Webhook Pipeline
Order State Machine
Reconciliation Service
Accounting Sync
Fraud Hooks
Refunds and Disputes
Planning
Critical considerations
The things I have learned the hard way and would not skip on the next build.
Options
Alternative approaches
Where I would consider a different shape entirely, with the trade-offs spelled out.
Implementation
Related playbooks
Step-by-step guides for the harder parts of this architecture.
Designing Event-Driven Systems
Event-driven architectures unlock real autonomy between services, and they expose a whole new category of bugs if you do not respect their constraints. This playbook is the design discipline I use: model events as facts, version schemas carefully, choose the right broker, build idempotent consumers, handle ordering and failure, and add the observability that makes async systems debuggable in production.
Securing Your API Endpoints
API security is not a sprinkle of middleware, it is a layered set of defenses where any one missing layer opens the door. This is my full checklist for hardening API endpoints: authentication, rate limiting, validation, CORS, audit logging, and the response headers that mitigate the long tail of browser-side attacks. Used on every production API I have shipped.
Production Monitoring & Observability
Observability is not three pillars on a slide, it is the difference between knowing why your system is misbehaving and guessing. This playbook is the monitoring stack I deploy on every production system: error tracking, structured logging, performance metrics, distributed tracing, and the dashboards and alerts that turn raw data into actionable signal without paging everyone at 3 AM.
In practice
Related case studies
Where I have applied this blueprint to real builds and what changed in practice.
Thinking
Related insights
Essays where I argue the trade-offs behind the choices in this blueprint.
Need help implementing this blueprint?
I help teams adapt blueprints like this to their specific requirements and ship from planning through production.
E-commerce
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