Senior Simulation Software Engineer

Plus 2; Santa Clara (CA); On-site; USD 150,000 - 190,000; Full time

Benefits offered by this job

Catered free lunch

Unlimited snacks and beverages

401(k) plan

Job summary

PlusAI, a Physical AI company in Silicon Valley, seeks engineers in Santa Clara to join its fast-growing team. Design and build AI agentic workflows that analyze simulation results, identify failures, and surface root causes for engineering teams.

You will architect scalable simulation pipelines, quantify sim-to-real divergence, and collaborate across simulation, onboard, systems, and data science to improve autonomy performance.

Qualifications

• MS or PhD in a relevant engineering or CS field.
• Experience building LLM-powered workflows for data analysis or automation.
• Experience closing sim-to-real gaps in autonomous systems.
• Proficiency in Python or C++ and scalable data processing.
• Strong problem-solving and collaboration skills.

Responsibilities

• Design and build AI agentic workflows to analyze simulation results and surface root causes.
• Architect scalable simulation pipelines and evaluate metrics across road tests.
• Identify and reduce sim-to-real divergence using data-driven methods.
• Monitor and improve platform performance, scalability, and reliability.
• Collaborate with cross-disciplinary teams to reproduce and resolve issues seen in road tests.
• Contribute to long-term system architecture.
• Ensure compliance with customer requirements and QMS standards.

Skills

LLM-powered workflows

Python

C++

Data processing

Communication

Education

MS or PhD in engineering/CS

PhD new grad

Tools

LangChain

LangGraph

Job description

PlusAI is a Physical AI company pioneering AI-based virtual driver software for factory-built autonomous trucks. Headquartered in Silicon Valley with operations in the United States and Europe, Plus was named by Fast Company as one of the World’s Most Innovative Companies. Partners including TRATON GROUP’s Scania, MAN, and International brands, Hyundai Motor Company, Iveco Group, Bosch, and DSV are working with Plus to accelerate the deployment of next-generation autonomous trucks. If you’re ready to make a huge impact and drive the future of autonomy, Plus is looking for talented individuals to join its fast-growing teams.

Responsibilities

• Design and build AI agentic workflows that automatically analyze simulation results, identify failures, and surface root causes across large-scale test runs, translating them into actionable insights for engineering teams.
• Architect and build scalable simulation pipelines, including the metric evaluation framework, and conduct in-depth analysis of road test and simulation data to identify trends, anomalies, and key performance indicators that enhance model accuracy and validate autonomy performance.
• Identify, quantify, and reduce sources of divergence between simulation and real-world behavior, leveraging AI and data-driven techniques to increase simulation fidelity across actor behaviors, sensor models, and system dynamics.
• Monitor and improve the performance, scalability, testing, and reliability of the platform.
• Collaborate with cross-disciplinary teams—including simulation, onboard, systems engineering, and data science—to reproduce and resolve issues encountered during real-world road tests.
• Work with other engineers to design the long-term architecture of the system.
• Ensure that technical work meets customer requirements, regulatory standards, and company quality policies, in accordance with the company's Quality Management System (QMS), and contribute to continuous improvement efforts.

Requirements

• MS with 3+ years of relevant experience, or a PhD new grad, in mechanical, electrical, aerospace engineering, physics, computer science, or a related field.
• Experience building LLM-powered or agentic workflows for data analysis, evaluation, or automation.
• Experience quantifying or improving simulation fidelity / closing the sim-to-real gap (e.g., sensor modeling, actor behavior modeling, scenario generation).
• Proficient in Python or C++, with experience building scalable data processing systems or evaluation frameworks.
• Ability to solve open-ended technical challenges.
• Excellent communication skills and the ability to collaborate effectively in a team setting.
• Experience with autonomous vehicle or robotics simulation and related concepts.
• Familiarity with LLM agent frameworks (e.g., LangChain, LangGraph, or similar) and prompt/tool-orchestration patterns.
• Experience developing metrics, user-facing APIs, or interfaces between system components.

Your opportunities joining PlusAI

Work, learn and grow in a highly future-oriented, innovative and dynamic field.

Wide range of opportunities for personal and professional development.

Benefits

• Catered free lunch, unlimited snacks and beverages.
• Highly competitive salary and benefits package, including 401(k) plan.