dotJS

The world’s sharpest JavaScript conference is back on September 18 2026, coming with @dotaiconf on September 17 - part of the @dotConferences series

[dotJS @dotJS]

Say hello to all our dotJS 2026 speakers:
-Karen Li - Software Engineer at @github
-@nicodotdev - Machine Learning Engineer at @huggingface
-@firt - Mobile & Web Developer, International Speaker, Trainer, Author of 14 books
-@LeaVerou - Web Standards Expert, TC39 delegate, and a WHATWG contributor
-@devlinduldulao - Creator of DaloyJS, Software Engineer, Educator
-@harshil1712 - Developer Educator at @Cloudflare
-@BartWaardenburg - Front-End Engineer Building Open-Source JavaScript Tooling
-@JoubranJad - Independent Web Perf Consultant & Creator of https://t.co/9Gmpra4oit
-Vishnudhasan Govindarajan - Product Engineer at Virgio
-@Hmadhsan - Software Engineer, Creator of callio

Lightning talks speakers:
-@ythecombinator - Staff Software Engineer at @Medallia
-@bartheletf - Co-founder & CTO of @alpic_ai
-@guillaumedotid - Field CTO at @upsundotcom
-Gabor Csomak - Staff Engineer at Bally’s Intralot
-@toddeTV - IT Consultant & Senior Full-Stack Web Engineer

Talk titles dropping soon, follow along for the full schedule!

Join us on Sept 18 in Paris: https://t.co/Xt8rX3iybH

[dotJS @dotJS]

Big hello to Lea Verou who will be on stage at dotJS! 🙌

@LeaVerou will be speaking about: No-build: pipe dream, or near future?

Almost every JS dev uses bundlers. Few actually like it. The mavericks who try to go no-build learn the hard way why it's still fringe. Are we stuck with bundlers forever, or is there light at the end of the tunnel (and is that light an oncoming train)? Lea takes a pragmatic look at what drives bundler usage, how well the web platform addresses those needs today and in the near future, what's still missing for no-build architectures to become viable, and whether AI changes the equation.

Lea has been improving the Web for nearly two decades. In her 14 years in the CSS WG, she designed many features you use daily. As a twice-elected W3C TAG member, she helped document the Web's Design Principles. She's also a TC39 delegate and WHATWG contributor, and in 2025 was awarded Pathfinder for Standards by the OpenJS Foundation for her overall work and impact. She holds a PhD from MIT, where she spent a decade researching and teaching at the intersection of usability, design, and web technologies.

Catch Lea live at dotJS.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Rolling on with dotJS speakers, hello Devlin Duldulao!

@devlinduldulao will be speaking about: A 50-year accident: how JavaScript got Date, and why Temporal exists.

Timezones. Leap years. Daylight saving. Lunar calendars. Nanoseconds. Mutability. What started as "I just need today's date" somehow became one of the most treacherous corners of web development. Devlin takes us on a guided tour through why date and time handling is genuinely, deeply hard, and why JavaScript's Date object makes it harder than it needs to be. Then we'll meet Temporal, JS's long-awaited replacement, and see how its carefully separated types (Instant, PlainDateTime, ZonedDateTime, Duration...) turn a minefield into a map.

Devlin is the creator of DaloyJS, a software engineer, educator, and published author with 10+ years of experience building and teaching modern web development.

Originally from the Philippines and based in Norway since 2019, he writes books and courses for developers who want to ship real, secure systems.

See it live at dotJS!

🟡 https://t.co/pehPvtvHH0

Bringing your team or colleague? DM us for deals!

[dotJS @dotJS]

Up next on the dotJS stage: Harshil Agrawal!

@harshil1712 will be speaking about: Beyond the Chatbot: Generative UI and the Execution Trust Problem.

Chatbots aren't the only way to interact with AI. Generative UI lets an LLM return actual React components tailored to the user, dashboards, forms, and interfaces that build themselves in real time. But running AI-generated code safely is a security challenge that iframes, Web Workers, and VM2 don't fully solve. Harshil will show how V8 isolates at the edge execute AI-generated TypeScript in milliseconds while containing the blast radius, complete with a live demo and a blueprint for building this safely in production.

Harshil works on the Developer Relations team at @Cloudflare, where he's a JavaScript developer, open-source contributor, and self-described low-code enthusiast.

Come and join us next week at dotJS to catch this talk live.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Next up for dotJS: Vishnudhasan Govindarajan!

Vishnu will be speaking about: Your Lighthouse Score Doesn't Matter on 3G.

Your Lighthouse score is not the truth. Most tools reflect ideal lab setups, not real-world usage. This talk will show how modern JavaScript architectures are failing billions of users, and how to rebuild for the actual performance landscape where 3G networks and $100 devices are still the norm.

Many teams believe their apps are fast because their tools say so, but synthetic metrics often miss the slow pain of real users. Vishnu will break down the systemic bias toward high-end testing environments, show how to simulate slow devices and poor networks, audit runtime bottlenecks on low-tier Android hardware, and reclaim speed through vanilla code, critical CSS, and server-led rendering that actually degrades gracefully.

Vishnu is a Product Engineer at VIRGIO, a builder and problem-solver who's helped startups scale from India to Silicon Valley. Deeply rooted in the React ecosystem, he champions clean architecture, great UX, and the power of simplicity in modern software.

Curious to hear more? Catch his talk live at dotJS.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Great search feels invisible - until you try a product without it. @Algolia makes sure you never have to 👀

Very grateful to have them as our partner for both dotAI & dotJS!

Algolia is a developer-first AI search and discovery API built for speed, relevance, and scalability. With multiple products like AI Search, AI Browse, AI Recommendations, and Advanced Personalization, it delivers real-time indexing, typo tolerance, and instant search out of the box. Designed for flexibility, Algolia integrates with your technology stack, giving you full control over ranking, filtering, and relevance tuning.

Join us in two weeks and meet the team!

🟡 https://t.co/Z5zAeSz81t (Sept 17)
🟡 https://t.co/pehPvtvHH0 (Sept 18)

[dotJS @dotJS]

Micro frontends: love them, hate them, or just doing them wrong? Let's find out. Meet Gábor Csomák.

Joining us for dotJS, Gabor will be speaking about: Microfrontends Done Right.

Gabor is a Staff Engineer at Bally's Interactive, where he's been shaping products and platforms since 2014, growing from developer to tech lead to staff engineer. With prior experience at UBS and GoTo, he brings decades of hands-on engineering expertise at the intersection of scalability, architecture, and team enablement, and is passionate about cutting through hype and aligning technical decisions with real organizational goals.

Most materials frame microfrontends as a purely technical solution: split your UI into smaller chunks, add some tooling magic, and voilà - problem solved. Except it isn't. Gabor argues microfrontends aren't about making your fragments smaller; they're about making your teams faster - an organizational strategy disguised as an architectural pattern.

Having built microfrontends since 2012, he'll share what he's learned about using them the way they were meant to be used.

Read more about his abstract on the website & join us:

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

What if TypeScript was secretly built for the age of AI agents all along? Guillaume Moigneu thinks so, and he's here to make the case.

Joining us for dotJS, @guillaumedotid will be speaking about: TypeScript was built for agent factories (it just didn't know it yet).

Guillaume is Field CTO at @Upsundotcom (formerly https://t.co/qBs8dPF6nD), where he leads the AI practice: internal change management, user-facing features, and the parts in between. Twenty-five years into a career in software development, he still can't walk past a watch or a camera without wanting to open it. These days the thing he's trying to take apart and augment is himself, with AI, and he's wondering whether the same trick works on a whole engineering organisation.

Running agents at scale is a manufacturing problem, and Guillaume argues TypeScript already has the production line: types as contracts, schemas as runtime guarantees, tests that prove the agent built the right thing. None of it was designed for agents. All of it is exactly what they need.

For more info on the agenda & the speakers (+ to get tickets!):

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Speaker spotlight on: Bart Waardenburg, joining us for dotJS!

On September 18, @BartWaardenburg will be speaking about: JavaScript tooling has a blind spot: codebase-wide questions.

AI can write plausible diffs fast, but in large TypeScript and JavaScript repos, the real failure mode isn't syntax or types - it's missing system context. Agents don't know which exports are dead, which modules sit in risky cycles, or which architectural boundaries should never be crossed.

Bart will show why AI-assisted development needs a deterministic codebase truth layer, and how graph-based analysis plus runtime evidence turns "this looks safe" into "you can delete this with confidence."

Bart is a full-stack developer and tech lead based in the Netherlands, and creator of Fallow, a Rust-native codebase intelligence tool for TypeScript and JavaScript - featured on https://t.co/KF7uFfZG6J's "How to Fix Vibe Coding" as "the number one tool people aren't using."

Want to know more? Head over to the agenda to check out his abstract - and grab your tickets for dotJS!

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Speaker spotlight on: Matheus Albuquerque - joining us for dotJS!

Ever wondered what your browser knows about performance that your dashboards don't? @ythecombinator is here to open up the hood and show you.

Matheus will be speaking about: Web Performance APIs That You (Probably) Never Knew Existed.

As a Staff Front-End Engineer at @Medallia, he is building their surveys platform and helping shape the customer experience market with React. He's also a Google Developer Expert in Web Performance, with interests spanning React and its ecosystem, JS and compile-to-JS languages, DX, and perceived performance optimization. Beyond speaking, he volunteers at TechLabs, teaching front-end development.

Matheus will walk through lesser-known platform primitives for measuring responsiveness and diagnosing bottlenecks, from observers and timing APIs to scheduling primitives, resource hints, and navigation improvements like View Transitions.

For more info on his talk and for tickets, RDV below.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Speaker spotlight on: Nikolay Rodionov joining us for dotJS!

From powering World Cup live streams to building the infrastructure behind agentic AI, @Jeanroudy has a track record of tackling hard technical problems at scale, and now he's bringing that experience to dotJS.

On the d-day, Nikolay will be speaking about: Building MCP Apps with All the Comfort of Modern TypeScript DevX.

Nikolay Rodionov is a cofounder and COO at Alpic, an AI infrastructure startup specializing in MCP Apps and agentic AI platforms. He previously founded Streamroot, a P2P video delivery technology that powered numerous World Cup streaming events before its acquisition by Lumen Technologies.

He's a seasoned speaker at conferences like Demuxed, MCP Dev Summit and AI Engineer Paris, and the creator of the Paris Video Tech and MCP Connect communities.

Building AI-powered apps shouldn't mean giving up the developer experience you expect from modern tooling. Nikolay will show how Skybridge, an open-source fullstack TypeScript framework, brings hot module reload, local emulation, and end-to-end typesafety to MCP app development - with a live dev session to prove it.

Read more about his abstract on the website and join us:

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Think your JavaScript foundation is as solid as you believe? Next up in our dotJS speaker series: Thorsten Seyschab!

@toddeTV is an IT consultant and senior full-stack web engineer who has been self-employed since 2014. When he's not assisting companies with their projects or providing guidance and support, he spends his time contributing to open-source projects, giving talks, and enjoying 3D printing.

At dotJS, his lightning talk is Promise You'll Know It? The Async JavaScript Quiz.

This session turns the conference hall into a live game show - you'll join a real-time interactive quiz using your smartphone. Thorsten will take you through the weird parts of type coercion, challenge your mental model of the event loop, and spot build configuration errors within the modern ecosystem. Vote on answers, solve syntax conundrums, and uncover facts about the spec you likely missed.

Come for the fun, stay for the challenge - and maybe leave with bragging rights as the top expert in the room.

Full abstract & tickets on the website, come and join us!

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Everyone's talking about the model, but that's only one piece of the puzzle. Up next in our dotJS speaker series: Hammad Hassan Bajwa!

@Hmadhsan is a software engineer based in Germany working across the JavaScript and AI stack. He builds full-stack systems and practical AI integrations, and he's the creator of callio, a unified API gateway for giving AI agents simpler access to external tools.

At dotJS, his talk is The Hidden Infrastructure Behind AI-Driven React Apps.

AI-native applications need a new layer of infrastructure most people don't talk about: context, memory, tools, agents, protocols, harnesses, security, and observability.

Hammad will break down how this architecture differs from traditional software, and why concepts like tool calling, MCP, agent runtimes, and harness engineering are becoming essential building blocks for developers.

Curious how it all fits together? The full abstract is up on the website.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

You don't need a cloud subscription or backend infrastructure to bring powerful AI into your web app. Next in our dotJS speaker lineup: Maximiliano Firtman!

@firt has written 14 books (including Vanilla Web and Hacking Web Performance), trained thousands of developers through Frontend Masters, Pluralsight, and LinkedIn Learning, and is an OpenAI Codex Ambassador. He's spent years teaching web performance, mobile dev, PWAs, and now AI - always with a practical, hands-on lens.

At dotJS, his talk is Unlocking Client-Side Generative AI in Your Web App.

Thanks to modern browser APIs and local model support, it's now possible to run generative AI - including text, vision, and speech - entirely on the client side. Max will show how to unlock these capabilities using built-in AI APIs, WebNN, WebGPU, and WebAssembly, with architecture patterns, browser and device capabilities, and live demos along the way.

Full abstract is on the website if you want to dig deeper:

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Every time you run npm install, you're trusting hundreds of maintainers you've never met. Continuing our dotJS speaker intros and their presentations - please welcome Karen Li!

Thrilled to welcome her to the lineup!

Karen is a software engineer at @GitHub with a unique path - concert pianist, then elementary school teacher, now technologist. That teaching background shows up in how she explains engineering: she's all about making complex systems click for people. Her motto is "I invest in brains," which honestly is a good motto.

At dotJS, her talk will be: What You're Really Trusting When You Run npm install.

Installing dependencies is an act of trust in a vast, mostly invisible network of maintainers. Karen will break down how that trust can fail, how a single compromised package can ripple across the ecosystem, and what emerging approaches like identity-based publishing and improved provenance can do to strengthen the system.

Want the full abstract? Head over to the website to read more and get your tickets.

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Next up in our dotJS speaker lineup: Nico Martin!

At dotJS, @nicodotdev's talk will be on: Boring but Effective: WebAI That Ships.

Everyone's talking about generative AI. But machine learning is so much more than chatbots... and a surprising amount of it runs directly in the browser, on ordinary consumer hardware. Text embeddings for semantic search, real-time speech recognition, image tasks like background removal: small open models, often just a few megabytes, powered by tools like Transformers.js and WebGPU. No cloud subscription, no API key, no gigabyte downloads.

Nico will walk through the tasks that already work on the hardware your users own - live, fully offline, and ready for production.

Nico is a Machine Learning Engineer focused on WebML at @huggingface, and a Google Developer Expert in AI and Web Technologies. He spends his time making AI accessible directly in the browser and sharing what he learns through workshops, articles, and talks.

Come say hi and grab your ticket to dotJS!

🟡 https://t.co/pehPvtvHH0

[dotJS @dotJS]

Speaker spotlights coming up for dotJS! Let's start with: Jad Joubran 🤗

Very excited to have him with us!

@JoubranJad is an independent web performance consultant and educator who's taught more than 20,000 developers through online platforms, in-person training, and university lectures. He's also the creator of https://t.co/bLuJo7Fljv and is recognized as a Google Developer Expert for his work in the web community.

At dotJS, his talk will be on: The (Abundant) State of the Web.

The web platform is moving faster than ever - features that used to take years to land across browsers are now showing up in a fraction of the time. On top of that, AI is changing how we build: boilerplate is disappearing, APIs are easier to navigate, and entire features can be scaffolded in seconds.

Jad will dig into where the web stands today, what's finally become reliable, and which skills actually matter now that building has gotten this much easier.

🟡 To read more about the abstract & get your tickets, RDV over here: https://t.co/pehPvtvHH0

[dotJS @dotJS]

If you missed this, here's the dotJS agenda, taking place September 18, in Paris 🎉 !

A warm welcome to the following speakers and their talk titles:

- @JoubranJad (Independent Web Perf Consultant & Creator of https://t.co/U0jDsFNBzc) - The (Abundant) State of the Web

- @nicodotdev (Machine Learning Engineer at @huggingface) - Boring but Effective: WebAI That Ships

- Karen Li (Software Engineer at @gitHub) - What You’re Really Trusting When You Run npm install

- @maxifirtman (Mobile & Web Developer, International Speaker, Trainer, Author of 14 books) - Unlocking Client-Side Generative AI in Your Web App

- Hammad Hassan (Software Engineer, Creator of Callio) - The Hidden Infrastructure Behind AI-Native Apps

- Thorsten Seyschab (IT Consultant & Senior Full-Stack Web Engineer) - Promise You'll Know It? The async JavaScript Quiz

- Nikolay Rodionov (Co-founder & COO of @Alpic_ai) - Building ChatGPT and MCP Apps with All the Comfort of Modern TypeScript DevX

- @ythecombinator (Staff Software Engineer at @Medallia) - Web Performance APIs That You (Probably) Never Knew Existed

- Gábor Csomák (Staff Engineer at Bally's Interactive) - Micro frontends Done Right

- Guillaume Moigneu (Field CTO at @Upsundotcom) - TypeScript was built for agent factories (it just didn’t know it yet)

- Bart Waardenburg (Front-End Engineer Building Open-Source JavaScript Tooling) - JavaScript tooling has a blind spot: codebase-wide questions

- Vishnudhasan Govindarajan (Product Engineer at VIRGIO) - Your Lighthouse Score Doesn’t Matter on 3G

- @harshil1712 (Developer Educator at @Cloudflare) - Beyond the Chatbot: Generative UI and the Execution Trust Problem

- @devlinduldulao (Creator of DaloyJS, Software Engineer, Educator) - A 50-year accident: how JavaScript got Date, and why Temporal exists

- @LeaVerou, Ph.D (Web Standards Expert, TC39 delegate, and a WHATWG contributor)

To read more about who they are and their abstracts, head over to the website:

🟡 https://t.co/pehPvtvHH0

And book your ticket(s) if you haven't yet done so 😉 . It's a great opportunity to watch these speakers live, but to also get a chance to speak to them after!

[dotJS @dotJS]

Three more dotJS speakers revealed, Sept 18!

Meet the sharpest technical minds in the #JavaScript ecosystem:

@JoubranJad - An independent web performance consultant and educator. He has taught more than 20,000 developers through online platforms, in-person training, and university lectures (Hogeschool van Amsterdam and Fachhochschule Salzburg). He's also the creator of https://t.co/bLuJo7Fljv and several other courses.

@BartWaardenburg - A full-stack developer, front-end expert, tech lead, and creator of Fallow, a Rust-native codebase intelligence tool for TypeScript and JavaScript. He works at the intersection of frontend engineering, static analysis, developer tooling, and AI-assisted workflows.

@toddeTV - Thorsten is an IT consultant and senior full-stack web engineer who has been self-employed since 2014. When he's not assisting companies with their projects or providing guidance and support, he spends his time contributing to open-source projects, giving talks, and enjoying 3D printing.

Want to join us?

Get your regular ticket until July 28, before the prices change:
https://t.co/OHJS91ryoJ

And remember, we also have combo ticket options if you want to attend dotAI the day before, on Sept 17!

[dotJS @dotJS]

We're kicking things off with a first sneak peek at some of the incredible minds joining us at dotJS, the world's sharpest #JavaScript conference for web developers, on September 18th in Paris.

Meet our first confirmed main speakers:

🟡 Karen Li – Software engineer at @github
🟡 @nicodotdev – Machine Learning Engineer at @huggingface
🟡 @LeaVerou – Web Standards Expert, CSS architect, and MIT PhD
🟡 @firt – Mobile and web developer, trainer, and author of 14 books
🟡 @devlinduldulao – Software engineer, educator, and published author
🟡 @Hmadhsan – Software Engineer

Get your ticket now or your combo ticket to attend @dotaiconf, the world's brightest AI conference for AI builders on Sept 17:

https://t.co/Z8PX4FozgG