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Caterpillar

Makes heavy machinery, engines and gas turbines

Sensor Calibration Engineer - Multi-Sensor Calibration (LiDAR / Camera / Millimeter-Wave Radar / RTK)

Robotics & Autonomous SystemsConfirmed live in the last 24 hours
Full-timeNo salary listedIn-person

About the Job

Requirements

  • A bachelor's degree or higher in computer science, automation, robotics, vehicle engineering, surveying, or a related field.
  • At least 3 years of experience developing multi-sensor calibration, simultaneous localization and mapping (SLAM), or multi-sensor fusion.
  • Proficiency in C++ and Python, and familiarity with Linux and ROS/ROS2.
  • Strong foundations in coordinate transformations, rigid-body motion (quaternions, Lie groups and Lie algebras), and nonlinear optimization.
  • Practical experience implementing intrinsic, extrinsic, and cross-sensor joint calibration.
  • Familiarity with camera intrinsic calibration, camera-LiDAR extrinsic calibration, and established methods and tools.
  • Ability to understand and implement target-based and targetless calibration methods.
  • Ability to design calibration-accuracy evaluation methods and analyze error sources and calibration degeneracy.
  • Familiarity with point clouds, camera imaging models, millimeter-wave radar, and IMU/GNSS data processing.
  • Familiarity with multi-sensor time synchronization, including hardware synchronization, PPS/GPS timing, and timestamp alignment.
  • Familiarity with PCL, OpenCV, Eigen, and Ceres/g2o point-cloud and optimization libraries.

Responsibilities

  • Develop intrinsic and extrinsic calibration algorithms for LiDAR, cameras, millimeter-wave radar, IMU, and GNSS/RTK.
  • Perform cross-sensor joint calibration for LiDAR-camera, LiDAR-IMU, and IMU-GNSS/RTK pairs to align sensors with vehicle coordinates.
  • Design multi-sensor time synchronization and timestamp-alignment methods, including hardware synchronization, PPS/GPS timing, and latency compensation.
  • Research targetless calibration methods and improve robustness in mining conditions such as dust, vibration, and large temperature variations.
  • Implement online automatic calibration and extrinsic-drift detection during vehicle operation, triggering recalibration or alerts when abnormalities occur.
  • Build a calibration toolchain and validation system covering data collection, calibration computation, result evaluation, and parameter management.
  • Associate and version-manage extrinsic and intrinsic parameters, algorithm versions, and vehicle and sensor serial numbers; support secure parameter deployment and rollback.
  • Design and implement standard operating procedures for production-line and mine-site calibration, supporting rapid calibration of vehicle batches.

Desired Qualifications

  • Experience with LiDAR-IMU or visual-inertial odometry (VIO) calibration, or tightly or loosely coupled fusion positioning.
  • Autonomous-driving experience in closed environments such as mines, ports, or industrial parks.
  • Experience with online automatic calibration, extrinsic-drift detection, and self-diagnosis.
  • Experience with GNSS/RTK, integrated navigation, and parsing CAN-bus timestamps.
  • Practical experience implementing production-line calibration or large-scale field calibration of vehicles.
  • Experience calibrating or processing data from 4D millimeter-wave radar.

About the Company

Caterpillar

Makes heavy machinery, engines and gas turbines

Caterpillar makes construction and mining machines, diesel and natural gas engines, industrial gas turbines and locomotives for contractors, mines, energy companies and data center builders. It is the world's largest maker of construction and mining equipment, and its yellow Cat bulldozers and excavators work in nearly every country. Customers buy or rent machines through independent Cat dealers, while its engines and turbines generate electricity and push natural gas through pipelines. Caterpillar earns money from equipment sales and from the parts and repairs that dealers supply over a machine's working life. It was formed in 1925 when California's Holt and Best tractor companies merged, and it is based in Irving, Texas.

Company size
10,001+
Company stage
IPO
Headquarters
Irving, TX
Founded
1925

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