Josh Klar
Senior Systems Engineer - OS Engineering at ServiceNow
Washington, United States
Summary
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RockstarJosh Klar is a Senior Systems Engineer with 13 years of hands-on experience building scalable platform, infrastructure, and backend systems, currently focused on OS engineering at ServiceNow. He combines pragmatic engineering—Terraform, Kubernetes, containerization, and observable production systems—with a strong background in Rails/Heroku operations and developer experience from startups to mid-stage companies. An active open-source contributor, Josh has meaningful work in well-known projects like Zulip and Forem and has shipped embedded firmware and CircuitPython changes, reflecting fluency from low-level devices to cloud platforms. He’s a practiced mentor who helps teams adopt debuggable, robust practices and makes infrastructure accessible to product engineers and external contributors. Based in Washington and comfortable working remotely, he seeks senior/staff roles that emphasize backend-heavy systems work and collaborative problem solving. One less obvious strength: he pairs a taste for careful design with a habit of surfacing learnings from “pits of things gone wrong,” turning past failures into teachable, production-hardened improvements.
13 years of coding experience
10 years of employment as a software developer
English
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (55)
vala10
ruby-rails10
dance10
docker10
py10
python10
firmware10
bash10
rails10
c1110
nrf5284010
containerization10
dockers10
cicd10
dbus10
Programming languages (26)
Github contributions (5)
KMKfw/kmk_firmware
Aug 2018 - Dec 2022
Clackety Keyboards Powered by Python
Role in this project:
Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:118 reviews, 355 commits, 196 PRs in 4 years 4 months
Contributions summary:Josh's contributions primarily focused on developing firmware for a keyboard using the KMK (Keymap for Microcontrollers) framework, a project related to "Clackety Keyboards Powered by Python." They implemented a 2x2 matrix for a keyboard and refined build processes for the firmware. Furthermore, the user added support for Unicode input via different methods (ibus and wincompose) and implemented features such as leader mode and tap dance functionality, showing deep integration with the keyboard's input and firmware mechanics.
rp2040samd51keyboardsnrf52840python
adafruit/circuitpython
Sep 2018 - Jun 2021
CircuitPython - a Python implementation for teaching coding with microcontrollers
Role in this project:Embedded Systems Engineer / IoT Developer
Embedded Systems Engineer / IoT DeveloperContributions:5 PRs, 25 comments, 1 issue in 2 years 10 months
Contributions summary:Josh contributed to the CircuitPython project by adding board and pin definitions for the MakerDiary nRF52840 MDK. Their work involved modifying C code (`pins.c`, `board.c`) and header files (`mpconfigboard.h`, `mpconfigboard.mk`) to configure the microcontroller's peripherals and define board-specific configurations. Furthermore, the user implemented partial support for f-strings in the CircuitPython lexer, demonstrating a strong understanding of the language's syntax and internal workings. The user also ensured the project built hex files correctly for the target platform.
pythonpython-implementationteachingmicrocontrollerpython3
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