Senior iOS App Developer for Push Notification Integration Delivery

CoreData Systems

Contract · Remote · Flexible hours

About the role

CoreData Systems is undertaking a major performance and reliability overhaul of its customer‑facing iOS services. We need an experienced iOS App Developer to redesign critical pathways, reduce latency, and ensure crash‑free operation under load.

Key responsibilities

• Profile existing codebase and pinpoint bottlenecks
• Refactor networking layers to use efficient REST API patterns
• Implement robust error handling and retry logic
• Optimize UI rendering for smoother interactions
• Write unit and UI tests to guarantee stability
• Collaborate with QA and backend teams for end‑to‑end validation

Must-have skills

• 5+ years Swift development for iOS
• Deep knowledge of REST API integration and performance tuning
• Experience with Instruments, Xcode profiling, and memory management
• Proven track record of delivering high‑reliability mobile apps

Nice to have

• Familiarity with Combine or RxSwift
• Background in CI/CD pipelines for iOS