
Senior Software Engineer, Apple Ads
Required skills
- C-like language
- cross-process communication
- concurrent programming
- client SDKs
- high-performance
- complex codebases
- legacy components
- OS fundamentals
- privacy-by-architecture
- on-device business logic
Nice to have
- Ad tech
- Apple platform
- Swift
- Objective-C
- public APIs
- SDKs
Role summary
Apple Ads is seeking a Senior Software Engineer to build on-device systems for ad delivery across the Apple ecosystem. This role focuses on systems and platform engineering, involving OS daemons, frameworks, and SDKs for ad fetching, ranking, filtering, policy enforcement, and privacy protection. Requires deep understanding of OS fundamentals, C-like languages, cross-process communication, concurrent programming, and building high-performance client SDKs. Experience with complex codebases and privacy-by-architecture is essential. Preferred qualifications include AdTech experience, Apple platform knowledge (Swift/Obj-C), public API design, and specific Apple technologies like XPC and Swift concurrency.
Description
We build the on-device systems that deliver ads across the Apple ecosystem: OS daemons, frameworks, and SDKs that fetch, rank and filter ad candidates; enforce ad policy and legal compliance; and protect user privacy before our partner apps even render anything. This is not a UI or app-building role: this is a systems and platform engineering position that requires working knowledge of cross-process communication, concurrency, on-device business logic, and privacy-by-architecture at scale.
Minimum Qualifications
Bachelor's degree or equivalent. Deep understanding of OS fundamentals (process/memory management, scheduling, file systems), on any platform — Apple experience not required Professional software development in a C-like language Familiarity with cross-process communication Advanced understanding of concurrent programming concepts and design patterns — multi-threading, synchronization, locking, and reasoning about races/deadlocks Experience building and operating high-performance client SDKs or libraries — including caching, versioning, breaking changes, and feature-flagged rollouts Experience on complex, long-lived codebases, sometimes with legacy components. Quickly learns new tech; excellent communication
Preferred Qualifications
Ad tech; Apple-platform fundamentals incl. Swift/Obj-C; designing/maintaining public APIs or SDKs for external developers; CoreData/libdispatch/XPC/Swift concurrency/daemons; telemetry/observability; client-server networking
Sample Apple interview questions
- 1
Design a typeahead box for a search engine
system designmedium - 2
Design a rate limiter
system designmedium - 3
Architect a key-value store for distributed systems.
system designmedium - 4
Design a system to schedule jobs in a distributed environment
system designmedium - 5
What is an API and how does it work?
technicalmedium
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