Justin Cremer
Senior Software Engineer at Kromeon
San Diego, California, United States
Summary
👤
Senior🎓
Top SchoolJustin Cremer is a Senior Software Engineer based in San Diego with over six years of experience across systems programming, security administration, and devops, currently focused on blockchain engineering and Rust within the Substrate ecosystem. He has shipped low-level and distributed systems work—from hardware drivers and immutable lab architectures to fullstack APIs and SDKs—bringing a systems-first mindset to product code. An active open-source contributor, he implemented the mv command and robust filesystem error handling in Nushell, demonstrating care for both ergonomics and correctness in shells and developer tooling. Justin’s curiosity extends to operating systems, filesystems, and shells in his spare time, which informs his pragmatic approach to platform design and resilience. Trained in cybersecurity at UC San Diego Extended Studies, he blends security awareness with hands-on systems engineering to build auditable, maintainable solutions. He’s as comfortable navigating underground tunnels by night (per his GitHub persona) as he is debugging production file system edge cases by day.
6 years of coding experience
3 years of employment as a software developer
Certification Cyber Security, Certification Cyber Security at UC San Diego Extended Studies
Github Skills (12)
sh10
command-line-interface10
filesystem10
script10
rust10
shell10
file-operations10
fileio10
scripting10
command-line10
cli10
error-handling9
Programming languages (11)
Github contributions (5)
nushell/nushell
Oct 2021 - Oct 2021
A new type of shell
Role in this project:
Back-end Developer
Back-end DeveloperContributions:26 commits, 1 comment in 8 days
Contributions summary:Justin primarily contributed to the implementation of the `mv` (move) command within the `nushell` shell. Their work involved creating the command, defining its signature, and implementing its functionality, including error handling for various file system operations. Subsequent commits refined the command's parameters, added custom error types for file system interactions, and incorporated code style improvements based on clippy suggestions. The user also touched upon other commands to support the new functionality.
shellrustnushell
xiuxiu62/suha
Jul 2021 - Oct 2021
A cross platform terminal file manager
Contributions:80 commits, 6 PRs, 58 pushes in 2 months
file-manager
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