Event marketing & sponsorships

Top 10 Events about JavaScript to attend and sponsor in 2025

Valentin Mileshko

• 5 min read
Top 10 Events about JavaScript to attend and sponsor in 2025

Following the previous article of key 2025 React events, we've created a full schedule of notable JavaScript conferences, happening this year. Scroll to below to see the sweetest.

1. JSWorld Conference

What org team says:
JSworld Conference as a full 3-day event will be displaying the latest topics involving AI in Frontend, LLMs and Generative AI, Web Performance, Agnostic JavaScript Tooling, TypeScript, Three.js, Deno, Astro, WebXR, Node.js, React, Vue, Angular 15, Qwik, Vite and so much more!!

2025 Speakers:

  • Evan You - Creator of Vue & Vite
  • Ben Holmes - Founding engineer @ Astro
  • Sacha Greif - Creator of the State of JavaScript Survey

2. jsday

What org team says:
jsday 2025 marks the 14th edition of Italy’s premier JavaScript conference, a key event for developers and tech enthusiasts eager to explore the latest in JavaScript trends, tools, and best practices.

2025 Speakers:

  • Carmen Huidobro - Developer Educator, Directus
  • Carly Richmond - Principal Developer Advocate & Manager, Elastic
  • Alfonso Graziano - Tech Lead, Nearform

3. CityJS London

What org team says:
The force behind an exceptional JavaScript Conference that has grown organically from the roots of a thriving monthly meet-up in London. At the heart of our story is the collaborative spirit of four distinguished JavaScript groups: Halfstack, JSMonthly, ex London JSCommunity, and London Node User Group.

2025 Speakers:

  • Kent C Dodds - Software Engineer and Educator
  • Tamas Piros - Director of Developer Advocacy, Cloudinary
  • Jo Franchetti - Lead Developer Advocate, Deno

4. International JavaScript Conference

What org team says:
iJS provides a focused, specialized learning environment dedicated to Javascript, enabling attendees to explore the latest trends, tools, and best practices with guidance from international experts. Our events are designed to help professionals elevate their skills, enhance their products, and improve effectiveness.

2025 Speakers:

  • Kilian Valkhof - Frontend developer, open source contributor
  • Maxim Salnikov - Web development, IoT, cloud, community, expert
  • Nir Kaufman - Angular Expert, Author & Community Organizer

5. JavaScript fwdays

Overview:
JavaScript fwdays'25 is a 15th tech conference which is devoted to JS by the Fwdays team. The conference will be held on May 24 in offline (in Kyiv) and online formats. Let's talk about JS frameworks, development tools, performance, JS development ecosystem. Part of the profit will be donated to humanitarian funds or trusted volunteers 💙💛

2025 Speakers:

  • Illya Klymov - JavaScript.Ninja
  • Khrystyna Landvytovych - Frontend developer, DataRobot
  • Yuri Artiukh - CEO, Coderiver

6. CityJS Athens

What org team says:
A Community Event organised by the Community, our Javascript Conference evolved from the popularity and success of a monthly meet-up put together by 4 different JavaScript groups in London, including Halfstack, JSMonthly, London JS Community, and London Node User Group.

2025 speakers:

  • Anna Henningsen - Staff Engineer, MongoDB
  • Carmen Huidobro - Head of Developer Education, DevCraft Academy
  • Erik Rasmussen - Senior Frontend Engineer, Attio

7. JSHeroes

  • Dates: May 29–30, 2025
  • Location: Cluj, Romania
  • Organizer: JSHeroes community
  • Website: https://jsheroes.io/
Overview:
JSHeroes is a non-profit community-organized event, held every year in Cluj, Romania. Our goal is to bring together JS and Web/Frontend enthusiasts from all over the world for a single-track two-day conference with: quality content, amazing networking and tons of fun. You bring your ideas and desire to learn, we provide the relaxed atmosphere and the good vibes.

2025 Speakers:

  • Atila Fassina - Open-Source Developer, SolidJS Team Member
  • Bramus Van Damme - Chrome Developer Relations, Google
  • Chelsea Troy - ML Ops Engineer, Mozilla

8. JSNation Amsterdam

  • Dates: June 12 & 16, 2025
  • Location: Amsterdam, the Netherlands
  • Attendees: 1500 in-person, 10K online
  • Organizer: GitNation
  • Website: https://jsnation.com/
What org team says:
JSNation is a 2-day 2-track event focusing exclusively on JavaScript development. Discover the future of the JavaScript development ecosystem and get connected to its stellar crowd! Understand the latest trends in JavaScript development. See what 10k+ JS developers are up to. Meet those who shape the present and the future of the prospering nation.

2025 Speakers:

  • Evan You - Vue.js & Vite Creator
  • Sacha Greif - Creator of the State of JS survey
  • Tobias Koppers - Creator of Webpack and Turbopack

9. CascadiaJS

What org team says:
CascadiaJS 2025 is coming BACK to Seattle, WA and will run from Sept 17 - 20. We'll host a Welcome Reception on Sept 17, have 2 days of talks on Sept 18 and 19 and get out and about the Seattle area for a day of activities on Sept 20!

10. JSNation US

  • Dates: November 17 & 20, 2025
  • Location: New York, USA
  • Attendees: 700 in-person, 10K+ online
  • Organizer: GitNation
  • Website: https://jsnation.us/
What org team says:
Step into our annual narrative, embraced by 10k+ JS developers globally. As JSNation unfolds in the USA, join us in a collective journey. Witness the trends, meet the architects of change, and become a part of JSNation.

2025 Speakers:

  • Addy Osmani - engineering leader, Google Chrome
  • Scott Tolinski - Co-host of Syntax.fm

For the past 10 years, GitNation has been at the forefront of organizing developer conferences focused on React & JavaScript, the languages dominating web development. Interested in sponsoring our events? Contact us: [email protected]

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