"Office Requirement This position is required to be in the office 3 days a week. About Us Sauce Labs is the world’s largest full-lifecycle test automation platform and the company behind Selenium. Trusted by 80% of the world’s top ten largest financial institutions and over 300000 enterprise users Sauce Labs provides the only AI platform capable of turning business intent into autonomous testing and quality assurance. With a proprietary dataset of 8.7 billion test runs Sauce Labs empowers the Fortune 2000 to bridge the gap between AI-driven code generation and enterprise-grade software quality. Learn more at saucelabs.com The Role Sauce Labs seeks a passionate Senior iOS Simulator Automation Engineer to join the Virtual iOS team. Sauce Labs' ""Virtual Device Cloud"" platform enables customers to test their mobile apps and browsers on remotely hosted iOS simulators at massive scale. In this role you will be a Senior Engineer to work within our agile development team. You will partner closely with the Product Owner Engineering Managers and principal engineers to drive the technical roadmap architect next-generation virtualization solutions and mentor junior team members to elevate the capabilities of the entire Virtual iOS team Responsibilities Design scale and maintain the automated deployment pipelines for cloud-based iOS simulator runtimes ensuring high availability and fault tolerance. Lead initiatives for iOS simulator runtime start-time optimization and infrastructure efficiency significantly reducing latency for end-users. Architect robust security boundaries and hardening strategies to ensure iOS simulators are secure isolated and performant under heavy multi-tenant workloads. Own and optimize the integration of major test frameworks (Appium XCTest) used for testing apps and browsers on iOS simulators ensuring seamless compatibility with new iOS/macOS releases. Mentor and guide mid-level and junior engineers fostering a culture of technical excellence code quality and innovative problem-solving. Evaluate emerging Apple technologies and virtualization trends to continuously modernize the Sauce Labs infrastructure. Required Skills 5+ years of professional software engineering experience with a heavy focus on macOS/iOS infrastructure or automation. Mastery of Xcode internals command-line tools and the iOS simulator runtime environment. Proven track record of automating and optimizing macOS environments at scale (bare-metal cloud or hybrid infrastructure). Deep production-level experience with mobile testing automation frameworks specifically Appium and XCTest. Hands-on experience creating solutions using the Apple Virtualization Framework on Apple Silicon. Strong communication skills with a proven ability to influence technical roadmaps write technical design documents (RFCs) and lead cross-functional initiatives. Valued Skills Low-Level Systems Knowledge Deep understanding of macOS internals the Darwin kernel hypervisors and file system mechanics (APFS). App Development Hands-on experience with native iOS application development (Swift/Objective-C) to better understand customer pain points. Tooling & Ecosystem Experience managing Apple Virtualization tools at scale (e.g. Tart Anka or Orka). Open Source Contributor Active contributor to the Appium or Selenium OSS projects or other relevant mobile/automation open-source communities. Please note our privacy terms when applying for a job at Sauce Labs. Sauce Labs is proud to be an Equal Opportunity employer and values diversity at our company. We do not discriminate on the basis of race religion color national origin gender identity/expression/status sexual orientation age marital status veteran status or disability status. Security responsibilities at Sauce At Sauce we will commit to supporting the health and safety of employees and properties partnering with internal stakeholders to learn and act on ever-evolving security protocols and procedures. You’ll be expected to fully comply with all policies and procedures related to security at the department and org wide level and exercise a ‘security first’ approach to how we design build & run our products and services."