Full-Stack iOS Developer (SwiftUI + Node.js) – Real-Time Blockchain Alert App

We are seeking a full-stack iOS developer to build a Blockchain event alert app and its supporting backend infrastructure. The system monitors real-time public blockchain data streams and sends sub-2-second push notifications to mobile users based on customizable backend filtering logic. All UI wireframes, backend architecture specs, and API documentation will be provided upon hire. Figma design will be provided as well. Tech Stack iOS App: SwiftUI (iOS 17+) Backend Runtime: Node.js / TypeScript (Hosted on Railway) Database & Push: Firebase (Firestore + FCM) Monetization: RevenueCat (In-app subscriptions & free trial paywall) Data Streams: EVM Webhook API (Alchemy) + REST APIs Scope of Work iOS Mobile App (SwiftUI) Build 3 primary screens: Feed View, Tracked Entities View, and Settings. Implement a 4-step interactive onboarding flow with a RevenueCat paywall. Manage FCM push tokens for instant delivery. Backend Engine (Node.js on Railway) Real-time Pipeline: Build a Webhook listener processing incoming EVM payloads. Parse events, check threshold rules, and dispatch FCM push alerts in under 2 seconds. Daily Curation (Cron Job): Build a 00:00 UTC scheduled task that queries public APIs, evaluates performance parameters, and updates the active monitoring watchlist in Firestore and the Alchemy Webhook. Please start the very first line of your proposal with the word 'FAST' so I know you read the full description and aren't an automated bot