Top iOS Developer Jobs in Chicago, IL

Design, build, test, and maintain iOS applications using Swift (Objective-C a plus). Collaborate with designers, product and backend teams, integrate RESTful APIs, perform unit testing and debugging, participate in code reviews and Agile ceremonies, and support App Store deployment.

Lead and mentor iOS development teams to design, build, test, release, and support high-quality mobile applications. Drive architecture, code reviews, CI/CD adoption, production troubleshooting, and cross-functional collaboration to meet business and security standards.

Lead design and development of high-performance, offline-capable iOS (iPad) and Android apps for mission-critical drone operations. Build real-time maps, video streaming, telemetry overlays; integrate with hardware; optimize battery, memory, and latency; implement offline-first sync; collaborate with backend/hardware teams; mentor engineers and establish CI/CD, testing, and security best practices.

The Core iOS Senior Engineer will lead mobile development projects, troubleshoot issues, and contribute to code reviews, requiring strong experience in Objective-C and mobile software development.

Build and ship native iOS features for onboarding, accounts, cards, payments, transfers, rewards and AI-assisted journeys. Improve performance, reliability and UX; integrate APIs and authentication; collaborate with product, design, backend and AI teams; own app quality and production issue debugging.

Lead iOS development for Thunderbird: design and improve mobile architecture, optimize performance and security, debug and test across unit/integration/automation, review and document technical decisions, own projects end-to-end, and collaborate with product, UX, and open-source contributors to deliver a scalable, accessible, and maintainable iOS app.

Lead design and development of Thunderbird's iOS app, improving architecture, performance, reliability, security, and accessibility. Own projects end-to-end, debug and test at unit/integration/automated levels, review code, mentor contributors, and document technical decisions while collaborating with product, UX, and open-source community.

The Senior iOS Engineer will lead product decisions, ship code for the iOS app, and enhance the app's architecture, ensuring a user-centric experience.

Design and build e-commerce iOS applications, integrate with back-end services, ensure performance and responsiveness, collaborate to define and ship features, identify and fix bugs and bottlenecks, maintain code quality and automation, and lead and mentor junior developers.

The Senior iOS Engineer will drive key engineering decisions, enhance the iOS app, and engage in product strategy discussions. Responsibilities include shipping production code and maintaining app architecture.

Design, build, and maintain high-quality iOS apps. Collaborate with PMs and designers, mentor engineers, and manage code ownership.

Own and ship the mobile app end-to-end: design architecture, implement native iOS/Android features (push, background tasks), integrate anti-smishing and verification-code protections, manage builds/releases and crash reporting, and collaborate with product, design, and security teams.

The role involves designing, developing, and maintaining iOS applications, driving technical architecture, and promoting knowledge sharing within the team.

Lead development and improvement of a production iOS app used by tens of thousands. Own architecture, UI, networking, local persistence, and automated tests. Collaborate with Android and backend teams, diagnose async and device-specific issues, use Xcode Instruments, CI, and crash/analytics tooling, and drive product-minded technical decisions.

Founding iOS Engineer to build the app's core intelligence layer. Must implement production CallKit and on-device continuous Speech Framework recognition, integrate with SwiftUI/CoreData, and optionally add Dynamic Island Live Activity via WidgetKit. Equity-only founding role; product details under NDA.