Top Senior iOS Engineer Jobs in NYC, NY

Lead development of the Medal iOS app, owning architecture and shipping features for real-time recording, clipping, feeds, discovery, and chat. Collaborate with designers and backend teams, run experiments, use analytics and user feedback, and maintain high code and UX quality for millions of users.

Lead iOS architecture and deliver native Swift/SwiftUI features for a regulated financial client. Own modularization, state management, CI/CD, testing, secure data handling, API integration, and App Store releases. Mentor a mid-level engineer and enforce compliance and quality standards while leveraging AI-assisted tooling to accelerate delivery.

Lead design-first iOS development for a new collectibles marketplace: architect the app foundation, build high-fidelity animated interfaces, implement networking and real-time updates, ship fast experiments, improve performance and reliability, and set engineering standards while partnering with product and design.

As an iOS Engineer at Geo, you will develop user interfaces, own the app architecture, and write high-performance code.

Design, build, and maintain high-performance native iOS applications. Collaborate with cross-functional teams to define and ship features, ensure app performance and responsiveness, fix bugs, integrate RESTful APIs and third-party libraries, participate in code reviews, and evaluate new technologies to improve development efficiency.

Senior iOS developer to design and build maintainable, performant iOS apps using Swift/SwiftUI and modern concurrency. Build core UI infrastructure, write automated tests (XCTest/XCUITest), participate in code reviews, release apps to the App Store using CI/CD tooling, and partner cross-functionally to define mobile standards.

Build and ship iOS product features from idea to release using Swift and SwiftUI. Own user-facing experiences (discovery, purchase, opening, collection, wallet, redemption). Collaborate with founders, design, and backend. Use AI-assisted tools to accelerate development, test thoroughly, and maintain high quality.

Lead design and implementation of privacy-first iOS apps, build and iterate Cloaked Pay screens, own mobile payments, ship UI-heavy SwiftUI features, integrate REST/GraphQL APIs, use Core Data/offline storage, develop iOS and Safari extensions, enforce architecture and testing best practices, mentor engineers, and collaborate across design, backend, and product.

Build and lead the development of Sesame's iOS companion app while collaborating with engineering, design, and product teams to enhance user experience.

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.

Build and scale fan-facing iOS features using Swift and SwiftUI. Collaborate with product, design, and data across international teams, use AI tools to accelerate development, participate in A/B testing and analytics, and maintain high standards for performance, accessibility, and code quality.

Design, build, test, and maintain iOS applications using Swift and Objective-C. Collaborate with cross-functional teams, fix bugs, optimize performance, and evaluate new technologies to improve development efficiency.

Build and maintain iOS and tvOS features using Swift and UIKit. Collaborate with Product, Design, Backend, and QA to translate requirements, write clean tested code, investigate bugs and performance, participate in Agile ceremonies, and contribute to documentation and onboarding.

Lead development of Rogo's native iOS app, implementing features using Swift and SwiftUI, while establishing mobile practices and collaborating with teams.

Join a small team to develop innovative iOS applications focusing on AI, optimize performance, and enhance user experience. Expertise in Swift required.

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.

Founding iOS engineer to own end-to-end development of Harmonic's first iOS app: design and ship polished, AI-native mobile experiences, set architecture, testing and CI/CD, create reusable components, and mentor future mobile hires.

As a Senior iOS Engineer, you will lead feature development and architectural decisions for iOS/watchOS while mentoring other engineers and collaborating across teams to build high-quality consumer apps.

As an iOS Engineer at Ramp, you'll develop and enhance the mobile app, establish engineering standards, and collaborate with cross-functional teams.

Design and develop the iOS app for Suno, focusing on performance and user experience. Mentor team members and set technical direction.

Own and architect Polymarket's iOS product, build real-time trading experiences that handle live market data and fast-moving prices, lead iOS engineering standards, collaborate with product/design/backend, and mentor mobile engineers to ship high-quality production releases.

Lead architecture and development of Credit Genie’s iOS apps using Swift (Swift 6). Implement UX from design mocks, collaborate with product/marketing/engineering, improve development practices, mentor engineers, contribute across the development lifecycle, and evaluate emerging technologies to scale the app.

The Senior iOS Engineer will develop and maintain iOS applications, build cross-platform apps using Flutter, and collaborate with teams to enhance productivity and performance for clients.

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.

Design and build high-performance iOS trading interfaces handling real-time market data, complex order flows, and rich charting. Lead architecture, improve performance and observability, mentor engineers, collaborate with product/design/backend, and drive technical direction for pro-grade crypto trading on mobile.