Top iOS Developer Jobs in Seattle, WA

As an iOS Engineer on the Buyer Growth team, you will lead growth initiatives, develop features for our iOS app, and collaborate with various teams to improve user acquisition and retention.

Design, implement, and optimize high-performance iOS features and apps using Objective-C and related technologies. Work with design teams, conduct code reviews, evaluate tradeoffs, leverage AI tools to accelerate development, and ensure performance, multithreading, and low-power optimizations for Snapchat's camera experiences.

Lead architecture, build, test, and scale Gusto's iOS app and mobile infrastructure. Improve build pipelines, automated testing, release processes, and foundational services (push, accessibility, localization). Collaborate across product, design, security, and infrastructure teams; prototype, iterate, and launch customer-focused features while mentoring engineers.

The iOS Developer will be responsible for app development, testing, and debugging, utilizing Agile methodologies and various tools throughout the product lifecycle.

The iOS Developer will design, develop, test, and maintain applications on iOS, ensuring quality and performance while collaborating in Agile teams.

Own and develop native iOS experiences for traveler protection across shopping, checkout, booking, and post‑booking. Design technical solutions, collaborate with cross‑functional teams, write testable and observable code, resolve production issues, and safely integrate AI/ML features while maintaining security and performance.

The iOS Developer will focus on native iOS app development, requiring expertise in building customer-facing applications using Swift. Candidates must have a Computer Science degree and 8-10 years of experience.

The iOS Developer will build customer-facing native apps, develop mobile applications interfacing with RESTful services, and ensure performance and usability while maintaining high availability and uptime for solutions.

As an iOS Engineer, you will build the Sesame app for wearable devices, collaborating with design and firmware teams to create a seamless user experience while maintaining code quality and performance.

Build and maintain high-performance iOS apps using Swift and SwiftUI; integrate with GraphQL and REST backends; work with server-driven UI; collaborate with product, design, and backend teams; contribute to CI/CD, automated testing, performance, accessibility, and code reviews; adopt AI-assisted development and platform best practices.

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.

Own and enhance native iOS applications: build end-to-end features and UIs, integrate REST APIs and push notifications, optimize performance and localization, and manage releases across multiple regions while collaborating with a distributed team.

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 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.

The Software Developer will focus on Apple development using C++, Objective-C, and AutoLayout, and may develop automated tests while validating code changes.

Design, build, and maintain Compass iOS app features using Swift and modern Swift paradigms. Collaborate with Product, Design, and Engineering to scope and deliver well-tested, user-focused features, perform code reviews, write documentation, and propose engineering-led platform improvements.

The iOS Engineer will build foundational Swift frameworks, enhance app performance and reliability, develop internal tooling, and collaborate with product engineering teams.

Lead development of native iOS features (food tracking, activity logging, weight trends, AI-driven insights), deliver premium UI/UX with modern Apple frameworks, own flagship initiatives (Lock Screen Widgets, Live Activities, health data integrations), shape app architecture and standards, and collaborate cross-functionally while mentoring engineers.

The role involves iOS application development and project management, requiring experience in iOS development, testing, and agile methodologies.

Develop and manage iOS applications from design through publishing, utilizing strong communication and agile methodologies to ensure project success.

Design and build mobile applications (primarily iOS), ensure app performance and quality, define and ship new features with a development team, identify and fix bottlenecks and bugs, maintain code quality and automation, and actively communicate progress and challenges with team members.

The role involves leading key engineering decisions, actively shipping code for the iOS app, participating in product discussions, and enhancing app architecture. Candidates should focus on user experience and product evolution.