Lead Software Engineer - iOS

We know that people want great value combined with an excellent experience from a bank they can trust, so we launched our digital bank, Chase UK, to revolutionise mobile banking with seamless journeys that our customers love. We're already trusted by millions in the US and we're quickly catching up in the UK - but how we do things here is a little different. We're building the bank of the future from scratch, channelling our start-up mentality every step of the way - meaning you'll have the opportunity to make a real impact.

As a Lead Software Engineer - iOS Engineer within JPMorgan Chase's International Consumer Bank, you'll design and build secure, high-performance, cloud-connected iOS applications in a flat-structure, product-oriented team. You'll own end-to-end delivery across the SDLC-from architecture and design through implementation, testing, release, and observability-while partnering closely with our Front-End Engineering team, including React Native colleagues, to ship delightful, compliant, and resilient customer experiences.

Job responsibilities:

• Lead a React‑Native‑first architecture while delivering native iOS modules in Swift where they add clear value.
• Build and maintain Expo modules that expose iOS capabilities to React Native; ensure clean integration with the iOS project.
• Contribute to the React Native codebase (TypeScript/JavaScript), including component APIs, shared utilities, and the cross‑platform design system.
• Architect and implement native iOS features (SwiftUI and/or UIKit) with strong emphasis on performance, accessibility, and maintainability.
• Design resilient networking for cloud services (URLSession, background tasks, WebSockets where appropriate), with retry/backoff, efficient payloads, and offline‑aware caching.
• Uphold iOS security best practices: Keychain, App Transport Security, certificate pinning, Secure Enclave, biometrics, and privacy‑by‑design data handling.
• Ensure compliance with Apple Human Interface Guidelines, App Store Review Guidelines, ATS, and accessibility standards.
• Test comprehensively: unit/integration (XCTest), UI automation (XCUITest), and end‑to‑end coverage for critical flows (e.g., Detox).
• Optimize performance and observability across RN and native boundaries; profile with Xcode Instruments and enforce performance budgets (startup, memory, battery, UI responsiveness).
• Partner cross‑functionally (Front‑End, Backend, Product, Design); own releases (code signing/provisioning, TestFlight/App Store), troubleshoot across devices/OS, and mentor developers while driving continuous improvement.

• Formal training or certification on iOS concepts and proficient applied experience
• Significant experience delivering production iOS applications in Swift, with mastery of platform APIs (SwiftUI and/or UIKit), concurrency (async/await, GCD), and modular architectures (e.g., MVVM).
• Strong networking expertise on iOS: URLSession, background tasks, structured error handling, resilient retry/backoff, efficient payloads, pagination, and offline‑aware caching; solid understanding of RESTful APIs.
• Deep knowledge of iOS security best practices: Keychain, App Transport Security, TLS certificate pinning, biometrics via LocalAuthentication, Secure Enclave, and privacy‑first data handling.
• Firm understanding of Apple standards: Human Interface Guidelines, App Store Review Guidelines, ATS, and accessibility (VoiceOver, Dynamic Type, contrast).
• Proficiency in testing for reliability: unit/integration with XCTest, UI automation with XCUITest; ability to design testable code and maintain deterministic CI pipelines.
• Performance and observability skills: profiling with Xcode Instruments (startup time, memory, battery), structured logging, and crash analytics; ability to set and meet performance budgets.
• Experience with release and distribution: code signing/provisioning, TestFlight/App Store submissions, staged rollouts, and post‑release monitoring.
• Familiarity with dependency and build tooling: Swift Package Manager and/or CocoaPods, Xcode build settings, and project configuration.
• Strong collaboration and communication skills; effective partnership with Front‑End Engineering, backend services, product, and design; clear written and verbal communication in English.
• Comfortable working in a dynamic, agile, geographically distributed environment; drives high‑quality code reviews, documentation, and continuous improvement.

• Experience contributing to React Native codebases (TypeScript/JavaScript) and collaborating across native/RN boundaries.
• Experience building Expo modules to expose iOS capabilities to React Native and integrating them cleanly into iOS projects.
• Familiarity with modern React patterns (Hooks, Suspense) and RN‑native bridging concepts.
• Experience with end‑to‑end testing for mobile (e.g., Detox, Appium, WebdriverIO).
• Knowledge of mobile observability (structured logging, metrics, crash analytics).
• Familiarity with GraphQL alongside REST.
• Experience with design systems and component‑driven development across native and RN.