
Apple GPU Compiler Backend Engineer
Required skills
- C++
- Compiler Backend
- LLVM
- GPU Architecture
- Apple Silicon
Nice to have
- Instruction Selection
- Instruction Scheduling
- Register Allocation
- Production Compiler Issues
Role summary
Apple is seeking a skilled Compiler Backend Engineer to design, implement, and productize advanced backend compiler optimizations for Apple Silicon GPUs. This role involves working across the full lifecycle from prototyping to production shipping, collaborating with hardware and software teams to resolve complex compiler and performance challenges. The engineer will contribute to an LLVM-based compiler backend, impacting graphics, gaming, and machine learning workloads across all Apple devices with a GPU. The position requires a strong background in compiler backend technologies, knowledge of GPU architectures, and demonstrated autonomy in resolving technical challenges.
Description
Our GPU Compiler Backend team is responsible for the design, implementation, and productization of the compiler that generates optimized code for Apple Silicon GPUs. We build synergies with hardware and software teams, from early architecture exploration through production hardening and shipping, and serve as the last line of defense for performance and correctness before code reaches customers. We are seeking a skilled Compiler Backend Engineer to join our team. This role spans driving compiler optimization projects to completion, resolving complex, ambiguous production issues escalated by key partners (ProApps, Machine Learning, and Gaming), and contributing to the exploration of new GPU architecture features. You will work on an LLVM-based compiler backend that generates optimized GPU binaries for graphics and compute workloads across every Apple device with a GPU.
Minimum Qualifications
Experience with modern C++ programming BS with 5+ years experience, MS, or PhD in computer science or related field Strong background in compiler backend technologies (LLVM preferred) Knowledge of GPU architectures and how they differ from CPU architectures Demonstrated autonomy and ownership resolving ambiguous, open-ended technical challenges Excellent written and verbal communication skills
Preferred Qualifications
Hands-on experience developing LLVM-based compiler backends Experience with instruction selection, instruction schedulers, and register allocators for CPU or GPU compiler backends Experience driving production compiler issues to resolution in a fast-paced environment
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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