Top Senior iOS Developer Jobs in NYC, NY

Build, test, release, and maintain native Android and iOS applications across a portfolio of consumer mobile products. Use Kotlin, Swift, modern mobile frameworks, automated testing, analytics, experimentation, and AI coding agents to deliver high-quality software. Collaborate with product, design, marketing, operations, and engineering teams, measure user impact, manage app-store releases, and adapt across codebases and product pods.

Lead the iOS engineering team and technical architecture for Aave App. Build secure blockchain functionality including wallets, private keys, transaction signing, RPC interactions, gas estimation, and onchain data flows. Establish standards for Swift and UIKit development, testing, observability, performance, release safety, and incident response. Remain hands-on with foundational architecture and security-sensitive features while mentoring engineers and partnering with product, design, backend, protocol, and security teams.

Own Android and iOS mobile development for a large consumer VPN product. Inherit and modernize existing codebases, integrate native VPN networking libraries, improve security, testing, CI/CD, release management, and app-store compliance. Collaborate with product, design, backend, DevOps, and marketing teams to deliver reliable user-facing features. Diagnose networking issues across mobile and Go components, optimize connection performance, and use AI coding agents responsibly.

Develop native applications for iPhone, iPad, Apple TV, and Apple Vision Pro. Lead feature development across the application lifecycle, write well-tested and performant code, resolve production issues, improve team processes, and collaborate on sustainable architectures. Mentor engineers through code reviews and pair programming, guide agile delivery, and present solutions to technical and non-technical stakeholders. Integrate backend systems, web services, and third-party software, with AVPlayer and video playback experience preferred.

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 a Staff iOS Engineer, you will lead mobile app architecture, collaborate with teams, improve development practices, mentor engineers, and stay updated with industry trends.

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

As a Senior iOS Engineer, you will develop features for Duolingo's short-form lessons, collaborate on software projects, mentor junior engineers, and optimize applications. Responsibilities include building iOS apps in Swift and enhancing user engagement in educational content.

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 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.

Lead ownership of the iOS platform: build offline-first apps with local persistence and sync, real-time communication, media capture/uploads, location/scheduling, and polished, accessible UI/UX for multiple user roles.

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.

Develop and ship production-quality mobile apps using React Native and native iOS/Android technologies. Translate product requirements into performant, maintainable code, support prototyping and internal testing, and test/debug apps across a wide variety of mobile devices.

Build and enhance iOS applications using cutting-edge technology, collaborating with various teams to develop user-friendly mobile experiences and optimize app performance.

The Senior Product Engineer will deliver the iOS app for Stream, collaborating across teams for architecture, optimization, and user experience enhancements.

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 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.

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.

The Senior iOS Engineer will design and optimize the iOS SDK, improve performance, enhance testing, lead releases, and advocate best practices.

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.

The Senior iOS Engineer will architect and develop connectivity features for the Oura iOS app, collaborating with firmware teams and ensuring high code quality.