OneSignal is a customer engagement platform for mobile push, web push, email, SMS/RCS, and in-app messaging — ConnectSoft integrates it when product teams need lifecycle journeys tied to real user behavior, not batch blasts.
We implement the OneSignal REST API from ASP.NET Core services: outbound notifications, user and segment updates, and event-driven triggers aligned with Microsoft Azure hosting and Application Insights telemetry.
SDK initialization (mobile, web) stays in client apps; server-side we focus on API keys in Azure Key Vault, idempotent webhook handlers for delivery events, and clear boundaries between marketing sends and transactional product notifications.
OneSignal pairs naturally with Segment, Braze, Mailchimp, and Firebase-class stacks — we document identity mapping and channel ownership so engagement does not fragment across systems.
