Payments & billing

Payment, subscription & billing integration for SaaS.

Build revenue-critical flows around the real states: trial, active, past due, failed, canceled, refunded, and everything your product needs to do when money and access meet.

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Billing is a state machine your customers can feel.

Payment integrations touch signup, access, invoices, support, finance, and retention. A successful charge is only one path. The product also needs a coherent response to failed payments, delayed webhooks, refunds, plan changes, and customers who need to update their payment method.

I have worked on Stripe subscriptions, metering, payment gateways, tokenization, VGS-backed flows, Laravel APIs, and the product surfaces around billing.

What I can help implement

SubscriptionsPlans, trials, recurring charges, upgrades, downgrades, cancellations, and access rules.

Usage and meteringCapture usage data and connect it to a billing model when the product needs more than flat pricing.

Webhooks and statesProcess payment events reliably and keep product state aligned with the provider.

Customer billingPortals, invoices, payment method updates, receipts, and support-facing billing context.

TokenizationVGS and tokenized card-data patterns that keep raw payment details outside more of the app.

Recovery and reconciliationFailed payment handling, retries, internal visibility, and concepts that help finance reconcile the system.

A billing workflow that accounts for reality

Customer action→Provider→Webhook→Product state→Customer + ops

PCI-aware implementation is about practical data boundaries and responsible scope. It is not a claim that one integration makes a business compliant by itself.

Relevant proof

Selected work includes a usage-based Stripe billing system and a PCI-aware payment vault implementation for SaaS workflows. See the case studies.

Questions buyers ask

Payment work beyond the happy path.

Can you integrate Stripe or another payment provider?

Yes. The exact implementation depends on the provider, payment model, product access rules, and the billing operations your team needs to support.

Do you build subscription and metered billing?

I can help with subscription states and usage-based billing flows where the product and payment model require them. The first step is mapping the state transitions and source of truth.

What does PCI-aware mean here?

It means designing practical boundaries around sensitive card data, such as tokenization or vaulting patterns, while recognizing that compliance responsibilities extend beyond code.

How do you handle failed payments?

Model the payment state, the customer-facing message, retries or provider events, access behavior, and the internal path for support or finance to understand what happened.

Make revenue flows easier to own

Bring the billing edge case.

Share the provider, the current product state, and the failure that keeps reaching support or finance.

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