We are seeking a highly skilled and experienced Staff Research Scientist with strong ISA extensions experience. This is a high-level research and development role.
Key Responsibilities:
* Analyse dynamic language overhead: Profile V8 and ArkTS interpreter/JIT to identify operations that consume disproportionate cycles (type checks, inline cache misses, garbage collection barriers, dynamic dispatch, deoptimisation)

* Design ISA extensions: Propose new instructions or architectural features that accelerate common dynamic language patterns while maintaining backward compatibility and security boundaries

* Prototype in software: Modify V8, ArkTS interpreter, or JIT compiler to use new instructions, measuring speedup on representative workloads (OpenHarmony apps, JavaScript benchmarks, browser workloads)

* 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

Required:
* 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

* Strong C/C++ and systems programming skills

* Comfortable working in Linux environments with Git, Make, scripting

* Equivalent industry experience (5+ years in CPU architecture, compilers, or language runtimes) welcomed

* PhD or MSc in Computer Science, Computer Engineering, or Electrical Engineering preferred