Zack Radisic
Co-Founder at Scalar
San Francisco, California, United States
Summary
🤩
Rockstar🎓
Top SchoolZack Radisic is a San Francisco–based co-founder and software engineer with six years of hands-on experience building high-performance systems and startups. He combines systems-level expertise—demonstrated by contributions to the fast, widely watched Bun runtime (shell implementation, parsing, escape algorithms, memory fixes and Windows compatibility)—with product instincts from founding Scalar. His background spans risk and operations roles across finance and biotech, giving him a rare blend of technical depth and pragmatic risk-awareness. Zack ships robust back-end and tooling work while also thinking strategically about product and organizational impact. He’s approachable and curious—“i build cool things” sums his style—and keeps office hours for conversations at cal.com/zackoverflow.
6 years of coding experience
5 years of employment as a software developer
Bachelor of Science - BS, Computer Science, Bachelor of Science - BS, Computer Science at University of Toronto
Stackoverflow
41reputation
312reached
1answer
1question
Github Skills (20)
scripting10
command-line-interface10
script10
command-line10
sh10
rust10
shell10
system-programming9
memory-management9
text-parsing8
jscript8
sys8
parsing8
system8
javascript8
Programming languages (6)
Github contributions (5)
oven-sh/bun
Sep 2023 - Apr 2025
Incredibly fast JavaScript runtime, bundler, test runner, and package manager – all in one
Role in this project:
Back-end Developer & System Architect
Back-end Developer & System ArchitectContributions:71 reviews, 77 PRs, 559 pushes in 1 year 6 months
Contributions summary:Zack was primarily involved in implementing and optimizing core functionalities related to the Bun shell, a JavaScript runtime. Their contributions include implementing a robust shell, command substitution, brace expansion, and support for conditional expressions within the shell. They also made improvements to parsing, and escape algorithms, addressed memory leaks and fixed various critical issues. Additionally, the user worked on file redirection and ensured compatibility with Windows systems, demonstrating experience with system-level programming and shell implementation details.
runtimeexecutablejavascriptpackage-manageresmodules
zackradisic/soundcloud-api
Nov 2020 - Sep 2022
A SoundCloud API v2 wrapper for Go
Contributions:4 releases, 68 commits, 2 PRs in 1 year 10 months
musicapisoundcloud-apisoundcloudsouncloud-api-go
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