iOS Developer

About RapNet

RapNet operates the world’s largest online diamond trading network, providing professional-grade digital infrastructure to thousands of businesses globally. Our systems are performance-driven, data-intensive, and built to operate at scale in a real-time trading environment.

Role Overview

We are seeking a skilled iOS Developer to join our team and work on an established, large-scale native iOS application. This is a mature production codebase with complex architecture, real-time functionality, and enterprise-level technical requirements. You will collaborate closely with backend, product, and design teams to build scalable features and maintain a high standard of engineering quality.

This is primarily a strong mobile engineering role, with occasional integration of AI-powered capabilities where relevant to product needs.

Tech Stack

Swift 5 | UIKit + Storyboards | URLSession + Apollo (GraphQL) | Core Data | Auth0 | Firebase (Crashlytics, FCM, Analytics, Remote Config) | SendBird | Ably | Intercom | Mixpanel | New Relic | CocoaPodsWhat

What You’ll Work With

• Large-scale production codebase using MVVM architecture with custom reactive bindings
• Swift and Objective-C interoperability
• Real-time messaging and push notification systems
• Complex search, filtering, and dynamic list interfaces
• Multi-language localization (English and Chinese)
• Minimum supported version: iOS 12.4
  
  

• Develop and maintain production-level iOS features
• Write clean, maintainable, and scalable code
• Collaborate cross-functionally to deliver new functionality
• Optimize performance and troubleshoot issues
• Participate in code reviews and architectural discussions
• Maintain high engineering standards across releases
  
  

• 5+ years of iOS development experience
• Strong proficiency in Swift and UIKit
• Experience working on large, production mobile applications
• Solid understanding of mobile architecture patterns (MVVM preferred)
• Experience integrating APIs (REST and/or GraphQL)
• Experience with Git-based workflows
• Experience using Cursor or similar AI-assisted development tools
• Familiarity with integrating AI APIs or intelligent features into apps