Senior/Sr. Staff AI Infrastructure Engineer, Inference & Optimization

didi; San Jose (CA); On-site; USD 170,000 - 351,000; Full time

Job summary

DiDi seeks a Senior/Sr. Staff AI Infrastructure Engineer, Inference & Optimization to lead performance tuning, deployment, and resource scheduling of vehicle-side and cloud AI models.

You will design efficient inference pipelines and tooling to ensure ultra-low latency in autonomous driving, while collaborating with perception/prediction, cloud infra, and safety teams. Ideal candidates have 3–8+ years in AI infrastructure, strong C++/Python, CUDA, and experience with TensorRT/ONNX Runtime;

Qualifications

• Master's degree or higher in CS, software or systems engineering or related field.
• 3–8+ years in high-performance computing, AI infrastructure, model optimization, or embedded deployment.
• Strong proficiency in C++ and Python, with CUDA/OpenMP and low-level profiling tools.
• Experience with TensorRT, ONNX Runtime and LLM inference frameworks (e.g., vLLM, TensorRT-LLM).
• Familiarity with NVIDIA Hopper/Thor architectures and memory bandwidth management.
• Ability to diagnose complex software-hardware integration issues and deliver production-grade solutions.

Responsibilities

• Own deployment, optimization, and resource scheduling of vehicle-side AI models within embedded constraints.
• Lead vehicle-side system stability initiatives and drive resolution for performance bottlenecks.
• Architect and scale service-oriented deployment environments for LLMs and foundational models.
• Track and evaluate industry methodologies, integrating optimization toolchains and quantization.
• Establish profiling and telemetry with CUDA tools to maximize GPU utilization across architectures.
• Collaborate cross-functionally with Autonomous Driving Perception/Prediction, Cloud Infrastructure, and Safety teams to enable rapid algorithm iteration and scalable deployment.

Skills

C++

Python

CUDA

OpenMP

Performance tuning

Cross-functional

Education

Master's or higher in CS/Software/Systems Eng

Tools

TensorRT

ONNX Runtime

vLLM

SGLang

TensorRT-LLM

Job description

About the Company

DiDi's autonomous driving unit was established in 2016 with the mission of developing Level 4 autonomous driving (AD) technology to make transportation safer and more efficient. In August 2019, the unit became an independent company, DiDi Autonomous Driving, dedicated to advanced AD R&D, product application, and business expansion. We believe integrating AD technology into a shared-mobility fleet will generate immense social value. By leveraging DiDi's specialized technology, operational expertise, and integrated ecosystem, we are positioned to build and operate a highly efficient, user-oriented autonomous fleet.

About The Role

We are seeking an experienced and mission-driven Senior/Sr. Staff AI Infrastructure Engineer, Inference & Optimization to lead the performance tuning, deployment, and resource scheduling of cutting-edge AI models across on-vehicle and cloud infrastructure. In this role, you will design high-efficiency inference pipelines, build system-level stability frameworks, and optimize hardware execution to ensure ultra-low latency and rock-solid operational reliability. You will act as a technical leader in AI infrastructure, accelerating model iteration and bridging the gap between frontier deep learning algorithms and real-time autonomous systems.

Responsibilities

• Own the deployment, optimization, and resource scheduling of vehicle-side AI models, ensuring high efficiency, low latency, and robust execution within embedded constraints.
• Lead vehicle-side system stability initiatives, conducting independent root-cause analysis and driving resolution for complex, system-level performance bottlenecks and runtime anomalies.
• Architect and scale service-oriented deployment environments for Large Language Models (LLMs) and foundational models to support offline simulation, automated annotation, and rapid model validation.
• Track and evaluate cutting-edge industry methodologies, continuously integrating advanced optimization toolchains, quantization techniques, and execution engines.
• Establish system-level profiling and telemetry frameworks using CUDA tools to monitor, analyze, and maximize hardware utilization across target GPU architectures.
• Collaborate cross-functionally with Autonomous Driving Perception/Prediction, Cloud Infrastructure, and Safety teams to enable rapid algorithm iteration and scalable vehicle deployment.

Qualifications

• Master's or higher degree in Computer Science, Software Engineering, Systems Engineering, or a closely related technical field.
• 3-8+ years of industry experience in high-performance computing, AI infrastructure, model optimization, or embedded deployment.
• Strong proficiency in C++ and Python, with solid expertise in parallel programming (CUDA, OpenMP) and low-level system profiling tools.
• Deep familiarity with mainstream inference engines (e.g., TensorRT, ONNX Runtime) and specialized LLM inference/serving frameworks (e.g., vLLM, SGLang, TensorRT-LLM).
• Practical understanding of modern GPU hardware architectures (e.g., NVIDIA Hopper, Thor) and memory bandwidth management.
• Demonstrated ability to diagnose complex software-hardware integration issues and drive scalable, production-grade solutions.

Preferred Qualifications

• Hands-on experience optimizing and deploying AI models on the NVIDIA Thor platform, including hardware resource scheduling and acceleration.
• Proven track record of serving large foundation models (e.g., LLaMA, Qwen, GPT) in production or high-throughput cloud pipelines using frameworks like vLLM, SGLang, TGI, or LightLLM.
• Background in deep learning training frameworks (PyTorch) and practical experience with model quantization (INT8/FP8/AWQ), kernel fusion, or graph compilation.
• Experience deploying real-time, high-availability AI workloads in autonomous vehicles, robotics, or edge devices.

The base salary range for this full-time position is $169,783 - $351,000 annually in addition to bonus, equity and benefits. Our salary ranges are determined by role, level, and location. Within the range, individual pay is determined by work location and additional factors, including job-related skills, experience, and relevant education or training.

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