The compiler engineering interview involves recruiter screening, data structure assessments, and intense technical rounds. Need to demonstrate expertise in LLVM/GCC, SSA form, register allocation, and optimizations, alongside architecture-specific knowledge and low-level C++ systems design.

There were two technical rounds. The first round was conceptual topics, no coding. The second round was coding, leetcode style. Make sure to know your resume well, and be comfortable with common algorithms. This was for internship.