Sr. Staff Performance Tuning Engineer (CPU PMU & Virtualization)

San Jose, CA · full time · Senior

$192,100 – $249,600

Listed on NIO’s own careers site. You apply with them directly — we never stand between you and the employer.

What this role is

This role focuses on diagnosing and eliminating performance bottlenecks in CPU and virtualization systems using hardware profiling tools and microarchitectural analysis. It suits experienced systems engineers who combine deep processor architecture knowledge with Linux kernel instrumentation to optimize real-time and virtualized workloads.

Our summary, not NIO’s wording. The full posting is on their site.

Skills this role names

What they ask for

Required

Bachelor's degree in Computer Science, Electrical Engineering, or related field
8+ years of system performance engineering experience
Understanding of CPU pipelines, execution engines, and memory hierarchy
Knowledge of interrupt architectures like GICv3/GICv4 and APIC
Understanding of MMU, virtual memory, and page tables
Proficiency with Linux performance tools: perf, eBPF/BCC/bpftrace, ftrace/trace-cmd
C/C++ and Python programming for performance tooling
Shell scripting for automation

Nice to have

Hands-on experience with ARM PMUv3 on Cortex-A55/A76/A78 or Neoverse platforms
Experience with KVM/QEMU, Xen, seL4, or other hypervisor environments