About
- Bazel build systems. I love hermetic, deterministic builds.
- Release engineering.
- Creating metrics and data pipelines.
- Configuring, maintaining and optimizing CI systems.
- Cloud computing on GCE using terraform, kubernetes.
- Linux, especially interested in Nix and NixOS.
- Dev-ops technologies including Docker, Mesos, Marathon, Terraform, Ansible, and Kubernetes.
- State estimation and sensor fusion using Kalman filters, including EKFs and UKFs.
- Visual odometry (primarily monocular)
- Computer vision algorithms using OpenCV and Matlab.
- Embedded systems and Yocto Linux.
- System integration and debugging using Robot Operating System (ROS) and similar distributed computing systems.
- Motion capture systems.
- Algorithm development and simulations using Matlab and Python.
- PID controllers and controller tuning.
- Data visualization and analysis tools using Python, Houdini, Grafana, Foxglove, Jupyter, and Streamlit.
- 3d printing.
- Protobuf API design.
Work Experience
Developing software and infrastructure related to direct air carbon capture.
- Current role leading build systems and infrastructure related work.
Performed contract software engineer work for Google X via PRO Unlimited on a non-public team.
- Converted legacy embedded build system into bazel build, enabling deterministic embedded development.
- Developed custom yocto based embedded linux distribution shipping a real time linux kernel.
- Developed yocto layers to enable embedded linux over the air updates using systemd-repartd, systemd-updated.
- Adapted open source, open hardware motor controller with torque feedback sensor, enabling torque control for robotics applications.
Developed software for last-mile delivery robot.
- Intially part of the Robotics team, but moved to Infrastructure team.
- Maintained CI / CD / Releases for a team of 50+ engineers and 20+ robots.
- Maintained Bazel build infrastructure for C++ / Python code base.
- Developed Bazel workflows for integration testing suites and embedded linux deployment including cross copmilation workflows.
- Implemented tooling to aggregate device usage (CPU / memory / cgroup usage) into custom middleware.
- Implemented automated flashing utilities to enable contract manufacturers to fully provision robots without engineering assistance.
Developed tools and software for aerial and terrestrial robots capable of physical automation tasks within GPS denied environments.
- Converted a local CMake build system to a Bazel cross compile workflow, allowing for a massive increase in developer productivity.
- Managed software build and release onto devices.
- Managed flight operations and integration with the PX4 flight control software.
- Worked with stereo vision depth estimates and occupancy grid based planning methodologies to enable safe autonomous flight.
- Led drone hardware integration projects and supporting customers integrating area17 autonomy software onto their existing hardware platforms.
- Assisted in development of a gRPC API allowing third parties to interface our drones.
- Set up a motion capture system for use in QA testing and automated capturing of flight performance metrics.
Specializing in state estimation, controls engineering, flight operations, systems integration, and dev-ops. Wrote and maintained code for autonomous drones, allowing for automated inspection of cell towers and wind turbines.
- Implemented a custom UKF estimation library for sensor fusion of local and global coordinate sensors, allowing for centimeter precision drone flight.
- Implemented a monocular visual odometery system.
- Set up a safety indoor flight cage using motion capture system for controller and estimator validation.
- Built tools for flight log analysis and analyzed flight data to determine root cause of field reports.
- Managed a Yocto Linux project for creating customized Linux installs for our embedded Linux systems.
- Set up and maintain a local compute cluster consisting of networked computers using Mesos, Marathon, ZFS, Docker, and Ansible technologies.
- Used this cluster to perform automated, full system offline integration tests. Tests utilized automated, procedural, environment generation allowing simulation of sensors and photo-realistic cameras. These inputs were used to simulate and test our full system on any number of use cases.
Windows / Linux Sysadmin for a local government IT department.
- Managed servers on an on-premise datacenter
Open Source Projects
A repository showing examples of how I use bazel including CROSSTOOL setups, resin integrations, and more!
GitHubDynamic WiFi configuration container for aarch64 using balena wifi-connect.
GitHubSchool Projects
Implemented a Simultaneous Localization and Mapping algorithm on an autonomous robotics platform. The robot is able to autonomously navigate around a room without prior knowledge of the environment using an Extended Kalman Filter to fuse wheel encoder odometry and monocular visual odometry data.
Developed software for controlling a 6 degree of freedom robotic manipulator. Created debugging GUI in PYQT4 to expedite calibration and algorithm development. Inverse kinematics were performed numerically by using Monte Carlo simulations.
Object detection with real world position and velocity estimation using stereoscopic camera correspondence.
Custom servo built using PID position control of a brushed DC motor, gear reduction, and an IMU as a feedback sensor. Reconfigured system using ROS to use a webcam as a feedback sensor to track objects and keep them in frame.
GitHubImplemented a two axis gimbal system in order to maintain a constant attitude of a camera through the control of two servo motors. I2C used to interface a digital gyroscope and accelerometer, sensor fusion performed using a digital filter.