Johnny C. Email & Phone Number

Kirkland, Wa, Us

Kirkland, Wa, Us

Kent, Wa, Us

New Glenn Avionics - Mission Computing Software

Kent, Wa, Us

New Glenn Avionics - Mission Computing Software

Boston, Massachusetts, Us

- Performed maintenance on Linux firmware deployed on Starry’s portfolio of base station products- Implemented C++ driver changes to suppress noise in frequency synthesizer output- Investigated and rectified race conditions in multi-threaded Wi-Fi radio drivers- Profiled embedded servers to rectify performance bottlenecks serving gRPC calls from client front-end- Architectured and implemented nginx reverse proxy to allow cloud access to an authenticated TLS endpoint on base station products- Updated Bash scripts deployed to base stations to improve user-interface for network operators- Implemented and maintained Rust and C++ tooling for monitoring Wi-Fi radio registers- Fixed Jenkins CI pipeline for internal uboot bootloader repository- Modified systemd unit files to streamline firmware validation- Developed Mender state scripts to migrate firmware on defective base stations- Implemented changes in frequency synthesizer driver to increase output power

Hingham, Massachusetts, Us

- Developed Wi-Fi and 4G LTE radio firmware to bridge ultrasonic tank level sensors with monitoring software over both MQTT and TCP- Debugged SSL/TLS socket issues in lwIP/mbedTLS to allow secure communication with remote hosts- Debugged development tools in collaboration with a vendor to flash code onto a microcontroller- Devised and implemented workarounds for hardware/software parity issues between radio daughter boards- Implemented secure Over-The-Air updates for radio and motherboard microcontroller firmware- Developed protocols and data structures to improve communication reliability to offline tank level sensors- Heavily optimized memory usage from 400 kB to 200 kB to permit large file downloads onto low-memory radio modules- Debugged and rectified communication issues and memory faults in boiler level controller firmware- Performed electrical testing on prototype PCBs to validate antenna performance, filter cascade design and echo detection circuitry- Reviewed schematic and layout designs and rectified assembly issues on manufactured PCBs- Wrote documentation for internal development processes in addition to end-user documentation- Assembled prototype ultrasonic tank level measurement units and performed final validation testing and packaging- Implemented a driver for an I2C RTC chip- Programmed microcontrollers for a pick-and-place machine

Developed "plugins" for the Spigot API. Designed architecture for 20k+ LOC project with particular emphasis on extensibility and flexibility. Improved development process to increase iteration cadence and reduce bug incidence. Performed code reviews to improve code quality and robustness. Diagnosed performance issues and redesigned communication scheme to mitigate future issues. Maintained extensive documentation on projects, codebases and error reports. Worked with IntelliJ IDEA, Git, Gradle, Guice, SQLite, MariaDB, JSON, JitPack, VisualVM.

Developed user-facing plugins from the ground-up for a “prisons” gamemode Minecraft server. Developed programmatic infrastructure, performed code reviews and guided junior developers. Worked with Guice, IntelliJ IDEA, ViM, the Spigot API, Git, Maven, SQLite, MariaDB, JSON.

Created server-side “plugins” for large Minecraft server networks. Plugins were crash-tolerant and robust, reducing recovery time server failures by over a week. Handled bug reports and investigations, reducing friction in the development pipeline and allowing for deployment to occur within a 24 hour timescale. Built low-latency applications within a margin of .14% of allocated time slices, broadening time allowance for other features. Conformed to project descriptions and responded to changing specifications during the development lifecycle. Worked with IntelliJ IDEA, ViM, the Spigot API, Netty, Git, Maven, MySQL, MongoDB, Redis.

Bachelor Of Science - Bs, Computer Engineering

High School Diploma