Sr Messages Infrastructure Engineer

Every day, millions of people connect via Messages, expressing and sharing with the people who matter most to them in many different ways. We are constantly adding new communication tools for iMessage, all with end-to-end encryption for both individual and group conversations. We believe privacy is a fundamental human right, and you’ll incorporate this belief into everything we build.

Designing and maintaining the on-device architecture that stores, vends, and syncs Messages data across iOS, macOS, watchOS, and visionOS.
Developing robust data structures, APIs, and database schemas to support innovative new Messages features.
Building and optimizing sync infrastructure, specifically focusing on Messages in iCloud and CloudKit integration.
Managing system daemons, attachment storage, and transcoding pipelines.
Creating testable code to rigorously test changes and ensure consistent quality and backwards compatibility over time.
Collaborating with cross-functional teams—including peer engineers on protocols, security, platform API, and user experience—to build exciting new features.

Strong object-oriented development and design skills
At least 6 years of industry experience building mobile applications
The ability to adapt quickly to new technical environments and resolve sophisticated problems
A passion for modular, maintainable, testable code

At least 2 years of prior hands-on iOS or macOS application development
Experience with Swift and/or Objective-C preferred
Experience with databases (SQLite), sync frameworks (CloudKit), and system daemons (XPC)
Experience with system concepts including multi-threaded processing, synchronization, and interprocess communication
Experience maintaining legacy code and backwards compatibility, with a record of replacing legacy code with new things in non-disruptive ways
Specific experience defining and driving data structures, APIs, or persistence layers for communication features

Join Apple’s Messages team as an engineer responsible for designing and ensuring the robustness of Messages core on-device architecture and sync infrastructure. Our team is dedicated to creating exceptional user experiences, as Messages is a crucial platform for secure global connections. You will focus on the foundational data structures, APIs, and persistence layers that power Messages across iOS, macOS, watchOS, and visionOS. Work on building and scaling infrastructure related to Messages in iCloud utilizing CloudKit, SQLite databases, and system daemons. You will have the opportunity to work closely with partner teams in iCloud, Telephony, IdentityServices. Come be part of the team helping our customers connect to their most important people in delightful, expressive ways.

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 $181,100 and $318,400, 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

At Apple, we believe accessibility is a fundamental human right. You’ll find that idea reflected in everything here — in our culture, our benefits and our digital tools. By welcoming as many perspectives as possible, we help you build a career where you feel like you belong.

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Apple accepts applications to this posting on an ongoing basis.