Performance Engineer: ARM64 Language Runtime

Huawei Technologies Research & Development (UK) Ltd; Cambridge; Presencial; GBP 70.000 - 110.000; Jornada completa

Descripción de la vacante

Huawei Research and Development UK Limited is seeking a Performance Engineer to optimize managed runtimes on ARM64 mobile‑class CPUs across the full runtime stack, including interpreter, JIT and AOT, GC and libraries. You will patch bottlenecks, measure gains with robust experiments, and contribute to faster software on evolving hardware.

The role sits in the CPU team and ties runtime analysis to core design decisions, with automation and potential upstream contributions.

Formación

• Degree in Computer Science, Computer Engineering, Electrical Engineering or a related field, or equivalent practical experience.
• Strong C and C++ (or Rust), with ability to work in a large, performance‑critical codebase.
• Hands‑on performance work in a language runtime, VM or compiler backend with measurable speedups.
• Fluency with profiling tools (perf, PMU counters, flame graphs) and ability to read disassembly.

Responsabilidades

• Runtime profiling: find and rank performance bottlenecks in interpreter, JIT/AOT, GC and runtime‑library code.
• Execution engine optimisation: improve interpreter and compiler tiers end to end.
• Interpreter dispatch, inlining, shapes and deoptimisation policy.
• JIT and AOT code quality: instruction selection, register allocation, inlining heuristics.
• Startup time optimisations: snapshots, AOT images, lazy compilation.
• Memory management: tune allocation and collection for throughput and pause time.
• Microarchitectural analysis: explain runtime behaviour in hardware terms and translate findings into changes.
• Measurement infrastructure: build benchmarking pipelines with reproducible results.
• Automated optimisation: use LLM‑agent pipelines to analyse profiles and propose patches.

Conocimientos

Strong C/C++ (or Rust)

Profiling

ARM64/x86-64 knowledge

Measurement & statistics

Upstream patches

Educación

Degree in Computer Science/Engineering or related field

Herramientas

perf

PMU counters

flame graphs

Descripción del empleo

Huawei Research and Development UK Limited is seeking a Performance Engineer to optimize managed runtimes on ARM64 mobile‑class CPUs across the full runtime stack, including interpreter, JIT and AOT, GC and libraries. You will patch bottlenecks, measure gains with robust experiments, and contribute to faster software on evolving hardware.

The role sits in the CPU team and ties runtime analysis to core design decisions, with automation and potential upstream contributions.