Software Engineer - UI Rendering

Apple•Cupertino, CA

About The Position

Apple's Compositing, Color, and Display Software organization provides the graphics software foundation for all of Apple's innovative products, including iPhone, iPad, Apple TV, Mac and Apple Watch. Our goal is to enable developers and HI designers to create exceptional visual experiences by efficiently utilizing hardware acceleration and color technologies through compositing and display. The technologies we develop are central to enabling enhanced experiences across our platforms, including acceleration for Liquid Glass UI material and presenting HDR content with the highest quality. We are looking for a talented Software Engineer with rendering expertise to join our UI Rendering team. In this role, you will contribute directly to the core systems that manage how graphics are displayed across all Apple devices. You will join the UI Rendering team and gain exposure to diverse technical challenges across rendering configurations. You will work on core rendering features, platform and device-specific code. You will implement features, debug complex issues, and build hands-on experience across different areas of UI Rendering. You will collaborate with GPU driver teams, display teams and Metal framework engineers to understand how the pieces fit together. Our team values versatility, deep technical expertise and a proactive approach to problem solving. We work in complex Unix-based codebases, where autonomy, strong debugging skills and the willingness to dive deep into intricate system level code are essential. You will develop the ability to work across different technical areas, a valuable skill for your career growth. As part of the team, you will contribute to the Core Animation graphics compositing and rendering engine that powers visual experiences across iPhone, iPad, Mac, Apple TV, and Apple Watch. You will implement and build the graphics technologies that bring our user interfaces to life, from foundational compositing systems to cutting-edge visual effects. Working at the heart of our graphics stack, you will bridge the gap between creative vision and technical reality. You will partner directly with HI designers to prototype and productize new visual concepts, collaborate with framework engineers to expose powerful rendering capabilities, and work alongside our Metal and GPU teams to unlock the full potential of Apple Silicon. From next-generation material systems to sophisticated animation techniques, you will help shape the visual foundation that defines how millions experience Apple products every day.

Requirements

Bachelor's or Master's degree in Computer Science or related field, or equivalent practical experience
3+ years experience in software development
1+ years experience with real-time rendering and computer graphics
Ability to write code and develop complex software in C/C++
Strong debugging and triaging skills for complex, multi-layered systems issues
Solid understanding of computer science fundamentals: data structures, algorithms and operating system concepts
Foundational understanding of Operating Systems, Computer Architecture, and CPU/GPU programming including memory subsystems
Comfortable working in Unix/Linux environments and using command-line tools
Curiosity and drive to tackle complex systems and new technologies
Good problem solving skills and attention to detail
Adaptability and interest in working across different technical areas

Nice To Haves

Experience with graphics performance analysis and optimization techniques
Excellent collaboration skills with cross-functional teams on complex large-scale projects
Ability to leverage GenAI to speed up development and increase quality
Experience with Mac or iOS application development using Swift or Objective-C
Hands-on experience with Metal or modern graphics APIs (Vulkan, DirectX)
Experience with layer-based rendering systems or scene graph architectures
Knowledge of color management, HDR, and wide color gamut workflows
Experience with CPU/GPU synchronization and multi-threaded rendering architectures
Experience with client/server or multi-process graphics architectures
Familiarity with GPU profiling tools and performance optimization for mobile platforms
Experience shipping consumer graphics products
Experience with automated testing frameworks for graphics rendering

Responsibilities

Contribute to core UI Rendering code across different areas of the team.
Implement features across Apple platforms
Maintain and improve critical platform code
Debug and resolve UI Rendering issues across UI stack
Work with codebases across different Apple Platforms.
Design, implement, and test Core Animation UI rendering features and compositing technologies across all Apple platforms
Partner with HI designers and framework teams to enable new visual experiences and design language evolution
Collaborate with Metal graphics framework and GPU and Display teams to leverage and influence platform capabilities for rendering innovation
Make critical technical decisions balancing visual quality, implementation complexity, and platform constraints
Develop tools and workflows that enable rapid iteration from design concept to production-ready rendering features
Ensure rendering quality, correctness, and visual fidelity across diverse content and platform configurations
Optimize rendering performance and power efficiency across Apple's diverse hardware ecosystem