OS Software Engineer, Evaluation

Apple, Inc.; Cupertino (CA); On-site; USD 129,000 - 225,000; Full time

Benefits offered by this job

Apple employee benefits

Stock programs and RSUs

Job summary

Apple Inc. is seeking an engineer for the on-device Experimentation service across macOS, iOS, and other Apple OSes.

You will design features, write high-performance libraries, and collaborate with cross-functional teams to enable developer and product capabilities—while focusing on memory, power, and user experience. You will work on the heart of the experimentation platform, delivering reliable functionality on devices used daily and contributing to AI-driven testing and experimentation

Qualifications

• Working proficiency in Objective-C, Swift, C/C++, Kotlin, or similar languages.
• Strong academic foundation in operating systems concepts, including concurrency, multi-threading, synchronization primitives, IPC, and memory management.
• Hands‑on experience developing low-level or systems software through internships, capstones, coursework, or open‑source projects.
• Excellent problem‑solving, debugging, and communication skills with team collaboration experience.
• Bachelor’s degree in Computer Science, Computer Engineering, or related technical discipline (or equivalent practical experience).
• Prior internship experience in systems software, embedded platforms, or platform engineering.
• Exposure to Unix/POSIX APIs, event loops, or system daemons/services.
• Experience in iOS, macOS, or similar OS.
• Appreciation of how platform design impacts end-user experience.
• Experience in experimentation or AI.

Responsibilities

• Design and implement new features and APIs for the on-device Experimentation service deployed across multiple Apple OSes.
• Develop and maintain high-performance libraries that are easy to use by developers.
• Participate in all phases of software development cycle from problem definition to testing and debugging.
• Diagnose and resolve issues across different layers of the software stack.
• Write unit and integration tests for new and existing code.
• Work with cross-functional teams to enable developer and product features.
• Appreciate how an OS design impacts end-user experience.

Skills

Obj-C/Swift/C++/Kotlin

OS concepts

Systems software

Problem solving

Internship experience

Unix/POSIX

iOS/macOS experience

UX impact understanding

Experimentation/AI

Education

Bachelor's degree in CS/CE or related field

Master's degree in CS/CE or related field

Tools

libdispatch/GCD

launchd/systemd

Job description

Cupertino, California, United States Software and Services

For the engineer that obsesses on how software can enable OS developers to evaluate and improve their features, there is no better place than Apple’s Experimentation team. The Experimentation team builds an end-to-end platform spanning the OS, data, and server for all the Apple OSes, operating at a scale of 2.5+ billion devices. We are addressing key challenges to accelerate the adoption of AI and an experimentation culture mindset across all Apple products/services. We are seeking engineers that can push the boundaries of low-level operating system technologies while maintaining a customer-centric focus on the developer and user experience.The mission of Evaluation is to measure, understand, and proactively improve all Apple features. We are looking for an engineer to build and extend the experimentation system for Apple to use across all our operating systems. You will be responsible for the on-device daemon and framework, that is at the heart of the experimentation platform. You will partner with feature teams across Apple to enable them to make a positive impact for the customers. You will ship code that runs on devices you use every day and powers a variety of Apple products. You will obsess over memory, power, performance in addition to the developer experience.

Description

Design and implement new features and APIs for the on-device Experimentation service that is deployed across multiple Apple operating systemsDevelop and maintain high-performance libraries that are easy to use by developersParticipate in all phases of software development cycle: from problem definition and design, through implementation, testing, and debuggingDiagnose and resolve issues across different layers of the software stackWrite unit and integration tests for new and existing codeWork with cross-functional teams to enable developer and product featuresAn appreciation how an OS design impacts end-user experience

Responsibilities

• Design and implement new features and APIs for the on-device Experimentation service that is deployed across multiple Apple operating systems
• Develop and maintain high-performance libraries that are easy to use by developers
• Participate in all phases of software development cycle: from problem definition and design, through implementation, testing, and debugging
• Diagnose and resolve issues across different layers of the software stack
• Write unit and integration tests for new and existing code
• Work with cross-functional teams to enable developer and product features
• An appreciation how an OS design impacts end-user experience

Minimum Qualifications

• Working proficiency in Objective-C, Swift, C/C++, Kotlin, or similar languages
• Strong academic foundation in operating systems concepts, including concurrency, multi-threading, synchronization primitives (mutexes, locks, semaphores), inter-process communication (IPC), and memory management.
• Hands‑on experience developing low-level or systems software through internships, academic capstones, coursework labs, or substantial open-source/personal projects (e.g., building a shell, multi‑threaded server, user‑space service, or operating system project).
• Excellent problem‑solving, debugging, and communication skills, with a track record of collaborating effectively in team or group‑project settings.
• Bachelor’s degree in Computer Science, Computer Engineering, or a related technical discipline (or equivalent practical experience).

Preferred Qualifications

• Prior software engineering internship experience in systems software, embedded platforms, or platform engineering.
• Exposure to Unix/POSIX APIs, event loops/run loops (libdispatch/GCD, kqueue, epoll), or system daemons/services (launchd, systemd).
• Experience in iOS, macOS, or similar operating systems
• An appreciation of how a platform design impacts end‑user experience
• Experience in experimentation or A/B testing and AI
• Master's degree in Computer Science, Computer Engineering, or a related technical discipline (or equivalent practical experience).

At Apple, base pay is one part of our total compensation package and is determined within a range. This provides the opportunity to progress as you grow and develop within a role. The base pay range for this role is between $129,300 and $225,300, and your base pay will depend on your skills, qualifications, experience, and location.

Apple employees also have the opportunity to become an Apple shareholder through participation in Apple’s discretionary employee stock programs. Apple employees are eligible for discretionary restricted stock unit awards, and can purchase Apple stock at a discount if voluntarily participating in Apple’s Employee Stock Purchase Plan. You’ll also receive benefits including: Comprehensive medical and dental coverage, retirement benefits, a range of discounted products and free services, and for formal education related to advancing your career at Apple, reimbursement for certain educational expenses — including tuition. Additionally, this role might be eligible for discretionary bonuses or commission payments as well as relocation. Learn more about Apple Benefits

Note: Apple benefit, compensation and employee stock programs are subject to eligibility requirements and other terms of the applicable plan or program.

Apple is an equal opportunity employer that is committed to inclusion and diversity. We seek to promote equal opportunity for all applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, Veteran status, or other legally protected characteristics. Learn more about your EEO rights as an applicant

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