Jobs at Alumni Ventures Portfolio Companies


Systems Engineer



Other Engineering · Full-time
San Francisco, CA, USA
Posted on Friday, June 28, 2024

Bun is an open-source JavaScript tooling company focused on making programming simpler. We've raised $26 million from top investors in Silicon Valley, are among the most popular GitHub repositories and have a growing community of 33,000 Discord members. In Bun v1.1, we added Windows support and we launched Bun v1.0 in September.

We're hiring systems engineers to come to San Francisco and help us make JavaScript faster and more productive. This role will involve lots of open-source low-level systems work, mostly in Bun's GitHub repository and eventually in a commercial hosting product.

At Bun, we take ownership over the entire software stack. That makes working here a great place to learn a ton about systems programming. In our day-to-day work on Bun, our team has written a JavaScript & TypeScript parser, an HTTP/1.1 client, TCP & UDP socket APIs, an efficient globbing library, a bash-like interpreter & shell, coreutils like 'cp', 'ls', 'seq' and so much more. To learn more about what we do every day, check out Bun's release notes or read through our pull requests.


  • Experience in a systems programming language such as C, C++, Zig, Go, or Rust
  • Experience with manual memory management in large codebases
  • Care deeply about technical excellence
  • This is an on-site role at our office in San Francisco. We aren't hiring remote at this time.

Bonus Points

  • Experience with Zig (most of Bun is written in Zig)
  • Experience with the internals of JavaScript runtimes: JavaScriptCore, V8, or SpiderMonkey
  • Understanding of UNIX systems, kernel, or TCP/UDP networking
  • Understanding of how to build multi-tenant, large-scale distributed systems

Benefits Bun is building a team of passionate and talented engineers who are excited to make JavaScript better for everyone. To achieve that goal, we are also building a workplace that where people are trusted, empowered, and well-compensated for their work.

Location: We have our own office in downtown San Francisco and cater free lunch every day Compensation: We offer competitive compensation with startup equity and room to grow based on your contributions Healthcare: We have flexible health plans that cover both physical and mental healthcare Time Off: Enjoy four weeks of paid time-off each year with flexible sick, family, and mental health leave

Bun is an equal opportunity employer.

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