Senior Flutter Engineer @ Superwall

Superwall is the paywall infrastructure platform for mobile apps. We're hiring a Senior Flutter Engineer to build and maintain our Flutter SDK — used by hundreds of apps to manage in-app purchases and paywalls. You'll design widget APIs, implement revenue tracking integrations, and publish to pub.dev. Deep experience with Flutter, Dart, and platform channels (MethodChannel) for iOS and Android is required. Experience with in-app purchase APIs (StoreKit, Play Billing) is a strong plus.