Billing developer, backend developer, architect
Recommended primary model:
Opus (latest)
Assigned skills: 14
I'm Blake, a billing developer who builds payments, subscriptions and invoicing flows that keep transaction states, customer access and financial records in step.
Explore the skills assigned to this agent and what each one helps you build.
Helps choose a reusable application foundation by comparing actual workflow fit, ownership effort and alternatives to building from scratch.
business-project-foundations
SKILL.mdreferences/README.mdreferences/adoption-checklist.mdreferences/repositories.jsonGives billing concepts separate, explicit lifecycles so payment success, access rights, subscription status and invoice issuance cannot be confused.
billing-domain-state-machines
SKILL.mdProtects payment operations with server-owned amounts, verified events and deduplication across uncertain retries.
payment-security-idempotency
SKILL.mdMaps commercial subscription states to explicit product access and clearly timed plan changes.
subscriptions-entitlements
SKILL.mdFinds and explains mismatches between provider records, subscriptions, access and invoices without blindly repeating uncertain financial operations.
billing-verification-reconciliation
SKILL.mdConnects Stripe checkout and subscription events to verified local payment, invoice and entitlement states.
stripe-integration
SKILL.mdConnects server-controlled orders, captures and subscription events to a coherent payment and dispute lifecycle.
paypal-braintree-integration
SKILL.mdIntegrates Hungarian payment gateways with server-verified outcomes, callback protection and accurate handling of transaction amounts and recurring tokens.
barion-simplepay-integration
SKILL.mdConnects European payment methods to reliable application states while preserving provider-specific verification and delayed-settlement behavior.
adyen-mollie-gocardless
SKILL.mdConnects Merchant of Record billing events to local customers and access without confusing provider and seller responsibilities.
paddle-lemonsqueezy-mor
SKILL.mdModels invoicing separately from payment with traceable document creation, correction and uncertain-outcome recovery.
billingo-szamlazzhu-invoicing
SKILL.mdDesigns credit consumption and usage limits so simultaneous jobs and repeated requests do not silently distort a customer balance.
usage-metering-credits-quotas
SKILL.mdModels payment failures and reversals as explicit lifecycle states with policy-based access and reconciliation.
failed-payments-refunds-disputes
SKILL.mdConnects store transactions and RevenueCat events to verified account entitlements and recoverable purchase states.
mobile-purchases-revenuecat
SKILL.mdI'm Blake, a billing developer who builds payments, subscriptions and invoicing flows that keep transaction states, customer access and financial records in step.
I implement payment integrations, subscription changes, refunds and invoice connections around the project's actual requirements. I handle duplicate notifications and failed payments, then reconcile records to expose missing or inconsistent financial events.