Checkout & Subscriptions: Web/App-Käufe, Rabatt-Logik, GA4-Events/Kohorten, Fehlertoleranz & idempotente Webhooks. * APIs/Integrationen: Stripe (Subscriptions, Webhooks), Firebase/GA4 (Events/Conversions), App-Stores (Google Play, App Store) Grundverständnis. * Cloud & Infra: Azure (App Service, Storage, Key Vault, Private Endpoints, RBAC), Terraform (Remote State, Imports). * Analytics/MarTech: Adjust/MMP-Setups, Meta/Google App-Events-Mapping, Consent/Tagging (GTM), A/B-Testing.
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