CPU Researcher

CPU Researcher focuses on design isa extensions: propose new instructions or architectural features that accelerate common dynamic language patterns while maintaining backward compatibility and security bou.

What the role involves

• Design ISA extensions: Propose new instructions or architectural features that accelerate common dynamic language patterns while maintaining backward compatibility and security bou.
• Prototype in software: Modify V8, ArkTS interpreter, or JIT compiler to use new instructions, measuring speedup on representative workloads (OpenHarmony apps, JavaScript benchmarks.
• Model in architectural simulators: Implement proposed extensions in GEM5.
• Collaborate on RTL implementation: Work with digital design teams to refine instruction encoding, pipeline integration, and verification requirements.
• Publish and patent: Document novel contributions through internal technical reports, conference papers, and patent applications.

Skills and requirements

• We are seeking a highly skilled and experienced Staff Research Scientist with strong ISA extensions experience.
• Deep understanding of CPU microarchitecture : pipelines, out-of-order execution, branch prediction, memory hierarchy, ISA design principles.
• Experience with architectural simulation (GEM5, Sniper, ZSim, or proprietary tools).
• Familiarity with interpreter or JIT compiler internals —any of: V8, SpiderMonkey, JavaScriptCore, HotSpot, ART, LuaJIT, PyPy, or similar.

Additional role context

• This is a high-level research and development role.