Top IoS Developer Jobs in Toronto

Lead the technical direction and delivery of Bitcoin and stablecoin experiences for iOS across Cash App, Square, and Bitkey. Build and ship complex features end to end, establish architecture and shared systems, integrate backend services, improve testing and release safety, and mentor engineers. Collaborate across product, design, Android, web, and backend teams while applying AI-assisted development practices and contributing to secure, reliable customer experiences.

Lead technical direction and hands-on development of Bitcoin and stablecoin iOS products across Cash App, Square, and Bitkey. Own architecture, implementation, testing, service integration, rollout, observability, security, and post-launch improvements. Build foundational systems, mentor engineers, influence cross-team standards, collaborate across platforms, and integrate AI-assisted development tools while maintaining software quality and reliability.

Design and build scalable, high-performance iOS experiences for crypto perpetuals trading, including real-time market data, charting, order entry, position management, and risk-aware workflows. Partner with product, design, backend, infrastructure, and data teams to deliver reliable mobile trading tools. Lead technical planning, improve performance and observability, support incident resolution, establish engineering standards, and mentor iOS engineers.

Develop and support full-stack Java applications, APIs, middleware, and native iOS applications across their lifecycle. Responsibilities include coding, testing, production troubleshooting, incident response, root-cause analysis, vulnerability remediation, monitoring, upgrades, disaster recovery, and continuous improvement. The role collaborates with technical and business partners and includes rotating on-call and after-hours support.

Lead the development of foundational iOS platform systems, shared frameworks, developer tools, architecture standards, and multi-quarter migrations across Cash App and Square. Drive performance, reliability, security, testing, observability, release safety, and AI-assisted development practices. This hands-on individual contributor role influences multiple teams, develops technical leaders, and partners broadly to improve iOS engineering quality, productivity, and product outcomes.

Build and release secure, high-performance mobile applications for digital asset users across iOS and Android. Own features from design through post-launch monitoring, integrate RESTful APIs, manage offline state and caching, implement comprehensive testing, and debug complex issues. The role requires deep experience with React Native, iOS, or Android development and collaboration in a fast-paced, onsite Toronto environment.

Develop and maintain customer-facing features in eBay’s core iOS application using Swift and SwiftUI. Integrate REST APIs, follow MVC and MVVM patterns, write tested and maintainable code, debug production features, participate in code reviews, and collaborate with Product, Design, Backend, and mobile engineering teams. Independently deliver scoped features for vehicle parts, recommendations, and international marketplace experiences while exploring AI-assisted development tools.

Develop and lead frontend platform engineering for native and hybrid mobile applications. Build reusable, well-tested Android and iOS SDK components, contribute to architecture and system design, collaborate with product and engineering teams, own customer-facing deliverables, and identify product improvements while maintaining strong engineering standards.

Own iOS technical direction for Everand and Scribd growth, retention, and monetization features. Build subscription, paywall, and in-app purchase flows using StoreKit; ship experiments; integrate APIs; improve stability and reduce technical debt. Collaborate with backend, web, and Android teams, lead technical initiatives, and mentor engineers while delivering scalable Swift applications.

Develop and own high-quality iOS software for a global courier offers and incentives experience. Collaborate with product managers and engineering teams on product definition, manage delivery timelines, integrate server-side APIs within a microservices ecosystem, and apply modularization and clean architecture. Contribute to code reviews, pair programming, inner-source projects, and the iOS guild by sharing development practices and standards.

Lead the architecture and evolution of native iOS foundations supporting seller-facing applications. Identify systemic problems, define platform strategy and standards, build prototypes and reference implementations, lead multi-quarter migrations, and establish practices for quality, testing, observability, release safety, and maintainability. Develop senior engineers and create scalable ownership models across teams.

Build and maintain iOS features for international Brokerage, Money, and Crypto products, including equities trading, account management, and onboarding. Collaborate with product, design, backend, compliance, and operations teams. Improve performance, testing, observability, release processes, and scalable mobile architecture while contributing to code reviews, documentation, and technical design discussions.

Build and scale customer-facing iOS marketplace experiences using Swift and SwiftUI. Implement feature-flagged functionality, write unit and UI tests, collaborate with Product, Design, Android, backend, QA, and senior iOS engineers, and take increasing ownership of reliability and operational health. Use AI tools for coding, refactoring, testing, debugging, documentation, and reducing repetitive work while critically validating generated outputs.

Build and scale customer-facing iOS applications for OPENLANE’s wholesale vehicle marketplace. Responsibilities include designing Swift and SwiftUI features, leading iOS architecture and UIKit modernization, improving testing and release practices, managing cross-cutting concerns such as authentication and analytics, using AI development tools, mentoring engineers, and collaborating with Product, Android, backend, platform, and QA teams.

Develop and maintain iOS, tvOS, and visionOS streaming applications using Swift and SwiftUI. Design scalable, testable architectures, integrate RESTful backend services, optimize audio/video playback and buffering, analyze performance, and collaborate cross-functionally on new features. Participate in code reviews, estimation, troubleshooting, automated testing, and applying AI-assisted development tools to improve productivity and code quality.

Develop and maintain native iPhone and iPad applications for hotel, rental car, and air travel bookings. Build innovative features using Swift, SwiftUI, Xcode, and the latest iOS SDK. Collaborate with product managers, developers, and UI/UX specialists to deliver fast, stable mobile experiences. Apply modern concurrency, architecture, persistence, dependency management, testing, and computer science principles. Mentor junior developers and potentially contribute to Android initiatives.

Lead delivery of major iOS software components and platform capabilities, collaborating with engineers and architects. Design, develop, test, implement, and support technical solutions throughout the software development lifecycle. Improve engineering practices, contribute technical and architectural expertise, and mentor junior, intermediate, and senior mobile engineers. The role requires advanced hands-on development using native iOS technologies, Swift, and SwiftUI, with exposure to cloud and agile environments.

Lead delivery of major iOS platform components, provide hands-on technical design and architecture, and contribute throughout the software development lifecycle. Design, develop, test, implement, and support technical solutions while improving engineering practices. Mentor mobile associates and advise technical and business stakeholders on evolving technologies. The role requires advanced Native iOS development using Swift and SwiftUI, application architecture, and agile collaboration.

Lead the architecture, development, performance, release process, and roadmap for SimpleStudy’s consumer iOS app. Mentor existing mobile engineers, establish technical direction, deliver polished native experiences, run experimentation and analytics, manage App Store operations, and collaborate with engineering and product leadership. The role involves Swift, SwiftUI, UIKit, testing, performance optimization, crash monitoring, and potential mobile team expansion.

Design, develop, and maintain Thunderbird's iOS app with a focus on performance, reliability, security, accessibility, and scalability. Own projects end-to-end, debug and test across unit/integration/automation, review code, reduce technical debt, document architecture, and collaborate with product, UX, and the open-source community.

Develop and maintain native iOS applications using Swift, focusing on performance, scalability, usability, and robust architecture. Partner with product, design, and engineering teams on planning and delivery; troubleshoot complex issues; write tests; maintain CI/CD workflows; and improve code quality. The role includes technical leadership, mentoring junior engineers, documentation, code reviews, and staying current with iOS technologies and development practices.

Own the iOS mobile roadmap and technical strategy for Superhuman Mail. Lead high-impact, complex engineering initiatives; define the mobile platform’s architecture, technical foundations, and one-to-two-year vision; partner with product and engineering leadership on strategy and execution; mentor senior engineers; drive cross-functional alignment; and promote AI-native software development practices while delivering reliable, high-quality mobile experiences.

Design, build, and maintain high-quality iOS applications using Swift (and Kotlin where applicable). Collaborate with cross-functional teams to implement features, optimize performance, fix bugs, integrate with GraphQL APIs, write tests, participate in code reviews, and produce technical documentation while partnering with UX/UI designers.

As a Staff iOS Engineer, you will develop and enhance key iOS app features, collaborate with cross-functional teams, and shape technical standards.

Develop iOS applications for consumer and enterprise clients using Swift. Responsibilities include writing maintainable and performant software, code reviews, extensive testing, researching development tools, collaborating with team members, and improving workflows. The role requires knowledge of mobile application architecture, UI frameworks, REST APIs, server-side integration, and common architectural patterns such as MVVM, MVP, and MVC.