Salary
$200k – $260k per year
Location
Hybrid (Santa Clara, United States)
Seniority
Staff · 7+ years exp
Visa
H-1B filings in 12 months: 5 · green card filings: 4
Employment
Full-Time
Confirmed on the employer's own hiring board on Nov 7, 2026. First seen by Alion on Aug 6, 2026. PlusAI scores B on the Alion truth index.
Overview
Company
Impact
Profile match
PlusAI is an autonomous driving technology company headquartered in Santa Clara, California, that develops SuperDrive virtual driver software for factory-built autonomous heavy trucks together with truck makers, plus the HyperFoundry AI data platform. Founded in 2016, it runs a testing facility in Fremont and operations in Texas, keeps a European head office in Munich, and in 2025 agreed to go public through a merger with Churchill Capital Corp IX. Its openings are mainly for research and machine learning engineers in motion planning, reinforcement learning and vision-language-action models, software verification and validation engineers, data engineers and program managers.
Backed by Notable Capital
As a Principal Engineer on our Mapping and Localization team, you will design and implement high-fidelity fusion algorithms that combine LiDAR, Radar, Camera, IMU, and GNSS data with HD Maps to achieve centimeter-level accuracy. You will tackle the hardest edge cases-from GPS-denied tunnels to dynamic construction zones-ensuring our vehicles operate safely in complex L4 ODDs (Operational Design Domains).
Responsibilities:
- Lead the design and evolution of our localization architecture, making critical build-vs-buy decisions and defining long-term technical roadmaps.
- Design and implement robust, real-time algorithms for sensor fusion, visual/LiDAR odometry, and global localization using techniques like Factor Graphs, EKF/UKF, and particle filters.
- Develop pipelines to generate, maintain, and query High-Definition (HD) maps.
- Work on "priors-based" localization and semantic map matching.
- Solve the "stale map" problem by designing systems for change detection. You will use fleet data to identify construction zones, lane shifts, or new signage and update the map in near real-time. Maintain and continuously update large-scale LiDAR-based HD maps to support autonomous driving systems.
- Optimize code for embedded compute constraints (latency, memory, and power) without sacrificing safety or accuracy.
- Provide self diagnosis capability for localization
- Act as a technical mentor to senior and junior engineers, conducting rigorous code reviews and fostering a culture of engineering excellence.
Required Skills:
- M.S. or Ph.D. in Robotics, Computer Science, Electrical Engineering, or a related field.
- 7+ years of industry experience in robotics, with at least 4 years dedicated to production-level localization or mapping systems.
- Expert-level Modern C++ (14/17/20) skills, with a deep understanding of memory management, multi-threading, and real-time systems.
- Strong theoretical foundation in probabilistic robotics, including Kalman Filtering (EKF, UKF), nonlinear optimization (Ceres, g2o, GTSAM), and SLAM.
- Deep understanding of 3D geometry, linear algebra, and coordinate transformations (quaternions, SE(3)).
- Familiarity with Eigen, Ceres, PCL, OpenCV, GTSAM
Preferred Skills:
- Experience shipping localization stacks for deployed autonomous vehicles or mobile robots.
- Hands-on experience with LOAM, lego-LOAM, ORB-SLAM, or VINS.
- Experience with CUDA/GPU programming or optimization for ARM-based embedded platforms.
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