LLM Inference Software Engineer - Data Plane

Amazon Web Services (AWS); Cupertino (CA); On-site; USD 165,000 - 224,000; Full time

Benefits offered by this job

Health insurance

RSUs

401(k) matching

Paid time off

Job summary

Annapurna Labs (U.S.) Inc. in Cupertino, CA is seeking a Software Development Engineer to own the design and implementation of the inference data plane for large models on custom hardware.

You will drive model execution, memory management, data movement, and integration with serving engines for production-scale performance. The role focuses on low-level optimization, end-to-end feature ownership, and contributions to scalable test and profiling infrastructure across CPU, GPU, simulator, and

Qualifications

• Bachelor's degree or equivalent required.
• 4+ years of full software development life cycle experience including coding standards, reviews, source control, build, testing and operations.
• Knowledge of computer architecture, operating systems, and parallel computing.
• Knowledge of Linux fundamentals.
• Strong proficiency in C/C++.
• Experience developing compute kernels for GPUs, DSPs, or custom accelerators.
• Proven track record of owning and delivering complex software features end-to-end.

Responsibilities

• Develop and optimize compute kernels for a custom ML accelerator architecture, targeting production-level performance for large language model inference.
• Implement and validate LLM architectures end-to-end - from PyTorch model definition through distributed execution on custom hardware.
• Integrate custom accelerator backends into open-source ML serving frameworks (vLLM, PyTorch), including scheduler extensions, memory management, and model parallelism.
• Build and maintain test infrastructure for model correctness validation across CPU, GPU, simulator, and hardware targets.
• Profile and optimize inference workloads - identify bottlenecks, instrument critical paths, and drive latency and throughput improvements from simulation through hardware bring-up.
• Own features end-to-end: from design through implementation, testing, and integration into the broader software stack.
• Contribute to CI/CD pipelines that gate model and kernel changes on correctness and performance regressions.

Skills

C/C++

Parallel computing

Linux

Computer architecture

GPU compute kernels

Education

Bachelor's degree

Tools

PyTorch

JAX

vLLM

TensorRT

TorchXLA

Job description

Annapurna Labs (U.S.) Inc. in Cupertino, CA is seeking a Software Development Engineer to own the design and implementation of the inference data plane for large models on custom hardware.

You will drive model execution, memory management, data movement, and integration with serving engines for production-scale performance. The role focuses on low-level optimization, end-to-end feature ownership, and contributions to scalable test and profiling infrastructure across CPU, GPU, simulator, and