What does it take to turn a from-scratch JavaScript engine into production software?

Johannes will go into detail on spec conformance, CI and benchmarking infrastructure, and how to catch regressions before they happen. There will also be live demos of what you can build when you can shape the entire runtime, plus a closer look at the corners of JavaScript most of us never have to think about.

Johannes has spent his professional career working on JavaScript across web, mobile and backend solutions. With agentic engineering, he has been looking for more complex and sophisticated projects to use AI with.

Modern JavaScript applications rarely fail because of a broken function. They fail at the boundaries: APIs, authentication, feature flags, browser APIs, payments and third-party services.

From a real journey at scale with over 1.3 million transactions, Eduardo will explore an outside-in testing strategy that focuses on what matters most: the interactions between your application and the outside world.

You’ll leave with practical techniques to build confidence, reduce brittle tests and ship changes with greater certainty, regardless of your JavaScript framework.

1771 Technologies is building LyteNyte Grid, a lightning-fast React data grid for complex, high-volume applications.

Lee will give a high-level overview of how LyteNyte Grid achieved best-in-class performance, with a small look at the technical details behind it.

Even in the age of AI, understanding and using the shell effectively remains an essential skill. This talk explores useful tips, tricks, and lesser-known Bash features that can help you work more efficiently and make your daily terminal experience smoother and more productive.

Node won server-side JS by being first. Then the guy who built it got on stage and apologised for it. Then a 22-year-old rewrote it in a language most JS devs never heard of and claimed 3x the speed. Then Deno - after years of being ideologically pure - quietly added node_modules support and nobody talked about it.

This talk is the story of how we ended up with three competing JS runtimes, what each one is actually betting on, and why the ending isn't a winner - it's a boring standard that might matter more than all of them.

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