WebAssembly Unleashed

Debugging is where real engineering happens, and WebAssembly is reaching the point where “you can instrument it” isn’t good enough. In this episode of WebAssembly Unleashed, Joel Moses and Oscar Spencer sit down with Elizabeth Gilbert, a PhD candidate at Carnegie Mellon, to talk about Whamm: a DSL and framework designed to make instrumentation in Wasm less of a one-off engineering project and more of a repeatable,...

AI is making code generation feel effortless, but it’s also flooding systems with more untrusted, machine-written logic than most teams are prepared to safely run. In this episode of WebAssembly Unleashed, Joel Moses and Oscar Spencer zoom out on what that shift means for WebAssembly, security, and the future of software development, with special guest Ben Titzer, Director of the WebAssembly Research Institute at Carnegie Mel...

WebAssembly Unleashed goes hands-on with a topic that shows up every time polished architectures collide with real production: programmability. Coming to you from F5's AppWorld 2026, hosts Joel Moses and Oscar Spencer are joined by WorldTech IT's Austin Geraci and Josh Brooks to talk about what actually happens when customers need traffic behavior that “shouldn’t exist,” but still has to work reliably at scale.

The...

WebAssembly is usually framed as an application runtime story, but at AppWorld 2026 in Las Vegas, WebAssembly Unleashed shifts the spotlight to a more urgent frontier: data. As AI architectures get hungrier and more distributed, performance and security constraints are moving closer to the data store itself. In this episode, Joel Moses and co-host Oscar Spencer explore why WebAssembly components could become the connective tissue b...

In this episode of WebAssembly Unleashed, hosts Joel Moses, Oscar Spencer, and Matt Yacobucci are joined by DevCentral Community Evangelist, Jason Rahm, to discuss programmability in the data plane. Through Jason's insights and use cases as both a former F5 customer and a current DevCentral maintainer they dig into the lessons learned from F5's iRules that Wasm should take note of. 

Tune in to understand the programmability pai...

In this episode of WebAssembly Unleashed, hosts Joel Moses and Oscar Spencer kick things off with updates on the upcoming Wasm.IO conference in Barcelona and the latest buzz around WASI Preview 3 before diving into an in-depth conversation with guest Ralph Squillace on Microsoft's Wasm strategy.

Ralph shares his journey in open source, from the early adoption of Linux at Microsoft to the rise of containers and the growing impact of ...

Join F5's Joel Moses, guest host Pat Hickey, and Microsoft Developer Advocate Yosh Wuyts as they dive deep into Microsoft's new tool, Wassette, designed to enhance the security and functionality of AI agents through WebAssembly. Learn about Wassette's sandboxing capabilities, its design components like Wasmtime, and its integration with various programming languages. Discover how Wassette leverages the component model to offer a sa...

Join hosts Joel Moses, Oscar Spencer, and Matt Yacobucci, along with special guest Pat Hickey, for part two of their in-depth discussion on the latest WebAssembly proposals and advancements. This episode dives into the phase three, phase two, and phase one proposals in development, covering critical topics such as ESM integration, wide arithmetic, stack switching, and the Wasm component model. The team debates the significance of t...

Get ready to unleash the raw truth about WebAssembly! In this episode of WebAssembly Unleashed, hosts Joel Moses, Oscar Spencer, and Matt Yacobucci are joined by guest Pat Hickey for a no-holds-barred deep dive into the latest proposals and advancements shaking up the WebAssembly space. From phase five proposals like tail calls and extended constant expressions to the thorny complexities of garbage collection, multiple memories, an...

Join hosts Joel Moses and Oscar Spencer as they dig into recent developments in the world of WebAssembly, starting with a look at Microsoft's Wassette, an initiative utilizing Wasm to enhance AI agent security. Then hear from special guests Khagan (Khan) Karimov and Arjun Ramesh, two doctoral candidates passionate about innovative WebAssembly research. Hear about Khan's focus on fuzzing Wasm implementations to root out security vul...

Join Joel Moses, Matthew Yacobucci, and guest-host Chris Fallin as they dive into the maturation of WebAssembly technologies and their implementation. Special guest Oliver Medhurst, a former Mozilla engineer, joins the conversation to talk about his project, Porffor, a unique compiler kit for JavaScript that allows ahead-of-time compilation to WebAssembly. The discussion covers the challenges and benefits of ahead-of-time compilati...

Join hosts Joel Moses, Oscar Spencer, and Matt Yacobucci as they dive deep into the world of formal verification with special guest Chris Fallin. In this episode of WebAssembly Unleashed, the team discusses the importance of formal verification in software development, particularly for WebAssembly. Chris, a co-author of the Cranelift compiler and Mozilla alum, explains the concept of formal verification, its significance, and how i...

Joins hosts Joel Moses and Oscar Spencer as they delve into the world of WebAssembly with special guest Andreas Rossberg, co-designer of the WebAssembly specification. Andreas shares insights on SpecTec, a domain-specific language designed to streamline and verify the WebAssembly specification. The discussion covers the evolution of SpecTec, its impact on WebAssembly proposals, and future possibilities for its application. Addition...

Join Joel Moses, Oscar Spencer, and Matt Yacobucci as they discuss the latest news and recent developments in WebAssembly, such as Zig 0.140 and projects like running Linux inside a PDF file. This episode features special guest Nick Fitzgerald, a notable contributor to WasmTime and CraneLift, who explains the concept of garbage collection in programming. The discussion covers  garbage collection in the context of WebAssembly, ...

Join hosts Joel Moses, Oscar Spencer, and Matthew Yacobucci as they discuss recent WebAssembly advancements, such as data science in browsers with WebR, LibreOffice now running as ZetaOffice, and a unique case study from Dagger.IO on replacing a React front end with Go and WebAssembly. The team is joined by special guest, journalist and analyst Bruce Gain, who shares his insights on the impact of WebAssembly in gaming and its appli...

Join hosts Joel Moses, Oscar Spencer, and Matthew Yacobucci as they take a retrospective look at WebAssembly's exciting developments from 2024 and share their insightful predictions for 2025. This special episode covers groundbreaking advancements in WebAssembly core technology, the WASI ecosystem, and highlights notable progress from previous guests like Bailey Hayes, Pat Hickey, Chris Dickinson, and more. Discover the evolving tr...

In this episode of WebAssembly Unleashed, hosts Joel Moses, Oscar Spencer, and Matt Yacobucci discuss recent developments in the world of WebAssembly, including government involvement and new standards. They are joined by special guest Till Schneidereit, Principal Engineer at Fermyon and Co-Founder of the Bytecode Alliance, who shares insights on the creation and mission of Bytecode Alliance and discusses the importance of cross-in...

Welcome to WebAssembly Unleashed with hosts Joel Moses, Oscar Spencer, and Matt Yacobucci. Join us as we dive into the latest happenings in the Wasm community. Fresh from WasmCon, the team delves into the evolving WebAssembly standards, including the upcoming WASI Preview 3 featuring async and streams. Special guest Alessandro Pignotti, CTO of Leaning Technologies, shares his journey in reviving Adobe Flash content with LightSpark ...

Welcome to WebAssembly Unleashed with hosts Joel Moses, Oscar Spencer, and Matt Yacobucci. Join us to discover who’s recently experienced impressive performance improvements using WebAssembly, how maple whiskey is related to Wasm runtimes, and what is the process of innovation.  This month our special guest, Matt Butcher, CEO of Fermyon, shares his incredible journey through the tech industry, his insights on WebAssembly...