Top IoS Developer Jobs in Toronto

Lead design and implementation of Neighborhoods mobile experiences across Cash App and Square. Shape cross-team architecture, stay hands-on with iOS development (SwiftUI, Workflow), drive integrations for discovery, ordering, loyalty, and fulfillment, mentor engineers, and apply AI-assisted workflows to accelerate development and quality.

Lead technical direction and architecture for Neighborhoods mobile across Cash App and Square. Drive cross-organizational integration, remain hands-on in iOS development (SwiftUI, Workflow), apply AI-native engineering practices, mentor engineers, and collaborate with backend, web, Android, product, and design partners to deliver reliable, scalable 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.

Lead design and implementation of eBay Live iOS features, translate requirements into maintainable code, mentor engineers, drive architecture and productivity improvements, own large functional areas, and collaborate cross-functionally to deliver scalable live-shopping experiences.

Contract iOS Developer to build and maintain iOS front-end and mobile features, work on web application integration using AngularJS/Backbone, and consume web services (REST, JAX-RS, XML-RPC, JSON-RPC, SOAP). Requires strong OO analysis, design, implementation and maintenance skills. 6-12 month contract in Toronto.

Lead cross-team iOS engineering for Neighborhoods across Cash App and Square: define architecture, stay hands-on with SwiftUI/Workflow codebases, deliver integrated loyalty/ordering features, mentor engineers, and adopt AI-native workflows to accelerate development and quality.

Lead technical direction and architecture for Neighborhoods mobile experiences across Cash App and Square. Drive cross-organizational mobile initiatives, stay hands-on in iOS development, partner with backend/web/Android teams, mentor engineers, and apply AI-assisted workflows to accelerate feature development and quality.

Build and lead development of Pinner-facing iOS features from ideation through release. Collaborate with product, design, and backend teams, prototype and run A/B tests, architect scalable solutions, employ automated testing, and leverage AI to accelerate and improve engineering outputs while ensuring quality and verification of AI-assisted work.

Develop innovative mobile solutions collaboratively with cross-functional teams, focusing on native iOS applications and user experience best practices.

Design and implement selling features for eBay's iOS app. Build native iOS production-ready code, apply modern design patterns, write unit and UI tests, collaborate with product and services teams, debug network issues, and iterate quickly within an Agile engineering team.

Lead design and delivery of production-grade iOS agent solutions. Implement agent workflows, integrations, CI/CD, testing, observability, and secure features. Provide technical leadership, mentor engineers, drive code quality, and ensure implementations meet business and regulatory requirements.

Design, implement, and release scalable iOS features and frameworks working with product, design, and backend teams. Prototype, run A/B tests, apply automated testing, and use AI responsibly to speed workflows while ensuring quality, data protection, and maintainability for millions of users.

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

Develop and maintain iOS applications, ensuring performance and quality, collaborating with team members, and addressing bottlenecks and bugs.

Design, build, and maintain high-performance modular features for eBay's core iOS app. Collaborate with product, design, backend and analytics teams, integrate APIs (including GraphQL), manage app state, ensure performance and stability, write tests, participate in Agile processes, and contribute to CI/CD and code reviews.

The role involves leading engineering decisions, actively shipping code, participating in product discussions, and maintaining app architecture for Speechify's iOS app.

Develop and maintain high-quality iOS applications, focusing on performance, scalability, and user experience while collaborating with cross-functional teams.

As a Senior iOS Engineer, you will develop and maintain high-quality iOS apps, optimize user experiences, collaborate with teams, implement CI/CD pipelines, and mentor junior engineers.

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.

Lead design and implement deep mobile platform integrations (primarily iOS) across the Graykey product. Debug across layers (Python, native C/C++, OS userspace and kernel), analyze crash dumps and disassembled binaries, drive features from design through production, mentor engineers, and collaborate with firmware and product teams to ensure reliable multi‑device, multi‑OS operation.

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.

As a Senior iOS SDK Engineer, you will lead the development of Sentry's iOS SDK, innovating features and designing APIs while leveraging advanced Apple technologies and ensuring robust architecture for high scalability.

Build and maintain Pricelines iPhone and iPad apps using Swift/SwiftUI and Xcode. Implement features, ensure performance and stability, collaborate with product and design, apply modern concurrency and mobile architecture patterns, and mentor junior engineers.

As a Senior iOS Developer, you will develop iOS applications, lead major product features, mentor developers, and ensure high-quality software through testing and code reviews.

As an iOS Developer, you'll develop consumer and enterprise applications, participate in code reviews, and engage in testing to ensure quality software delivery.