Subscription & ACH Payment Upgrade
Modernized subscription and ACH payment infrastructure while protecting existing customers and active transaction flows.
- Stripe
- ACH
- Subscriptions
- Webhooks
01 — Client Situation
Why the client needed this
The client needed to improve an existing payment system with additional payment capabilities—richer subscription behavior and ACH support—without disrupting customers already on active billing flows.
02 — Challenge
What made this difficult
The upgrade needed to protect existing customers and active transaction flows. Subscription lifecycle states, ACH settlement timelines, webhook reliability, and migration paths all had to stay coherent.
03 — Approach
Recommendation and decision making
Reviewed the existing payment architecture before implementing improvements. Billing logic was re-centered around Stripe subscription and payment-method primitives, with backend services owning business state.
- Audit Existing Billing
- Model Subscription Lifecycle
- Add ACH Methods
- Update Webhooks
- Migration Support
- Customer Portal Updates
04 — Architecture
How the pieces connect
A system map of the major layers, integrations, and operational paths in this project.
05 — Implementation
What was built
- ACH support for bank payment methods
- Subscription improvements across lifecycle states
- Payment method handling and customer portal entry points
- Webhook updates for invoices, failures, and dunning
- Migration support for existing customers and assumptions
06 — Outcome
What changed
Modernized the payment infrastructure while maintaining existing workflows—subscriptions and ACH became easier to reason about across customer actions and webhook events.
Have a similar system to build?
Let's discuss the architecture, integrations, and delivery approach for your product, payment flow, or AI workflow.
Start a Conversation