Plus
Senior/Staff Software Engineer (Machine Learning Runtime), Motion Planning
Be an Early Applicant
Design and optimize production machine-learning runtime pipelines for autonomous vehicle motion planning. Build high-performance C++ inference, feature extraction, trajectory generation, and orchestration components for embedded platforms. Develop validation, safety guardrails, fallback mechanisms, testing, monitoring, debugging, and observability tools. Investigate complex runtime failures and optimize latency, throughput, memory, and multithreaded performance while collaborating with machine-learning and systems engineering teams.
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, implement, and optimize the production runtime pipeline for ML-based autonomous vehicle planning.
- Integrate machine learning models into a scalable, safety-critical planning software stack.
- Optimize end-to-end inference performance through algorithm optimization, C++ implementation, profiling, memory optimization, and efficient execution on compute-constrained embedded platforms.
- Develop high-performance C++ components for feature extraction, inference, post-processing, trajectory generation, and runtime orchestration.
- Design runtime validation, safety guardrails, and fallback mechanisms to ensure generated trajectories are feasible, robust, and compliant with traffic rules.
- Investigate complex runtime issues by tracing failures across the planning pipeline, from feature extraction through inference to trajectory generation.
- Debug difficult edge-case scenarios using logs, profiling tools, visualization, offline replay, and quantitative analysis to identify root causes and implement robust solutions.
- Build tooling and infrastructure to improve debugging, observability, performance analysis, testing, and runtime monitoring.
- Collaborate closely with machine learning engineers to efficiently deploy new models into production while maintaining system reliability and performance.
- Drive continuous improvements in runtime architecture, scalability, reliability, and maintainability.
- Ensure technical work complies with the company's Quality Management System (QMS), customer requirements, regulatory standards, and internal engineering processes.
Requirements
- BS, MS, or PhD in Computer Science, Robotics, Electrical Engineering, or a related field.
- 4+ years of experience developing high-performance production software.
- Strong C++ programming skills with experience building, optimizing, and maintaining large-scale software systems.
- Experience optimizing real-time systems, including latency, throughput, memory usage, and multithreaded performance.
- Experience deploying machine learning inference into production environments.
- Familiarity with TensorRT, CUDA, ONNX Runtime, or similar inference acceleration frameworks.
- Strong software engineering fundamentals, including software architecture, testing, and code quality.
- Excellent debugging and analytical problem-solving skills, with the ability to systematically investigate complex software and system-level issues.
- Experience tracing failures across multi-stage pipelines, identifying root causes, and implementing reliable long-term solutions.
- Experience designing validation strategies, automated testing, runtime monitoring, and observability for production systems.
- Strong ownership mindset with the ability to drive problems from investigation through implementation, validation, and deployment.
- Excellent communication skills and experience collaborating across machine learning and systems engineering teams.
Preferred Skills
- Experience with autonomous driving planning, prediction, or robotics software.
- Experience profiling CPU and GPU performance using modern profiling tools.
- Experience deploying software on embedded GPU platforms.
- Familiarity with PyTorch and machine learning workflows.
- Experience with distributed systems, CI/CD, and cloud infrastructure.
- Deep expertise in modern C++ (C++17/20) and high-performance software engineering.
- Experience optimizing production inference pipelines for low latency and high throughput.
- Experience developing internal debugging, visualization, profiling, or observability tools.
- Proven ability to diagnose and resolve complex production issues involving machine learning, runtime software, and system integration.
- Strong systems thinking with the ability to balance correctness, performance, maintainability, scalability, and safety.
- Demonstrated technical leadership and experience mentoring engineers on large production software projects.
Bonus Qualifications
Candidates who stand out typically have one or more of the following:
Candidates who stand out typically have one or more of the following:
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.
Catered free lunch, unlimited snacks and beverages.
Highly competitive salary and benefits package, including 401(k) plan.
Plus Cupertino, California, USA Office
Cupertino, CA, United States
Similar Jobs
AdTech • eCommerce • Information Technology • Software • Travel • Generative AI
Design, build, and evaluate multi-step agentic AI systems (autonomous agents, tool use, memory, multi-agent collaboration). Integrate LLMs with tools/APIs, define evaluation frameworks, mitigate agent-specific risks, and collaborate to deliver production-grade solutions while mentoring junior team members.
Top Skills:
JaxLangchainLlamaindexLlm ApisPythonPyTorchTensorFlow
AdTech • eCommerce • Information Technology • Software • Travel • Generative AI
Leads the discovery, design, prototyping, deployment, adoption, and continuous improvement of AI solutions across Expedia Group. Partners with business and executive leaders to translate ambiguous challenges into measurable outcomes, establishes scalable AI and software engineering standards, evaluates models and architectures, develops reusable frameworks, and coaches senior engineers and emerging technical leaders. Ensures solutions address reliability, security, privacy, cost, observability, evaluation, responsible AI, and sustained business value.
Top Skills:
Agentic WorkflowsAi/MlAPIsAutomated TestingData ModelingGenerative AiLlmsObservabilityRetrieval-Augmented GenerationSource Control
eCommerce • Fashion • Retail • Sales • Wearables • Design
Provides customer service and sales support in a luxury retail store. Responsibilities include welcoming clients, operating POS and cash wrap, suggesting products, processing shipments and transfers, maintaining stock levels, replenishing the sales floor, executing visual merchandising updates, supporting social media engagement, and following housekeeping and loss-prevention procedures. Requires flexible availability, physical ability to handle stockroom and sales-floor tasks, and strong communication and organizational skills.
Top Skills:
InternetIpadLaptopMobile PosPosWalkie-Talkie
What you need to know about the San Francisco Tech Scene
San Francisco and the surrounding Bay Area attracts more startup funding than any other region in the world. Home to Stanford University and UC Berkeley, leading VC firms and several of the world’s most valuable companies, the Bay Area is the place to go for anyone looking to make it big in the tech industry. That said, San Francisco has a lot to offer beyond technology thanks to a thriving art and music scene, excellent food and a short drive to several of the country’s most beautiful recreational areas.
Key Facts About San Francisco Tech
- Number of Tech Workers: 365,500; 13.9% of overall workforce (2024 CompTIA survey)
- Major Tech Employers: Google, Apple, Salesforce, Meta
- Key Industries: Artificial intelligence, cloud computing, fintech, consumer technology, software
- Funding Landscape: $50.5 billion in venture capital funding in 2024 (Pitchbook)
- Notable Investors: Sequoia Capital, Andreessen Horowitz, Bessemer Venture Partners, Greylock Partners, Khosla Ventures, Kleiner Perkins
- Research Centers and Universities: Stanford University; University of California, Berkeley; University of San Francisco; Santa Clara University; Ames Research Center; Center for AI Safety; California Institute for Regenerative Medicine

.png)
