Scalendar June 2025

Event-driven Newsletter

June Scalendar is here, full of must-see Scala conference, frontend, and architecture events.

Sure, summer season just starting… but we’re already looking ahead to the big one: Scala Days 2025 in Lausanne! This is the event Scala developers need to know about – and we’re already buzzing (yes, even in June).

But before we fast-forward to August, there’s plenty happening this month you won’t want to miss.

From live coding with Li Haoyi at Functional World #18 to the 10th anniversary of React Summit, women-led creative Scala sessions, and good old Scala beer nights across Europe, June is packed with opportunities to learn, connect, and geek out with the community.

Scala Days Switzerland 

• August 19-21, 2025
• Lausanne, Switzerland
• https://scaladays.org

Scala Days 2025 is coming up, and this is the event you don’t want to miss!

Scala pros, contributors, and enthusiasts all in one place, sharing ideas, building cool stuff, and making the Scala community stronger. It’s a chance to get inspired, meet the people behind the libraries and frameworks you use, and level up your skills.
Check out the agenda of the event!

Scala conferences in June 2025

Functional World #18 | Better Scala Builds with the Mill Build Tool

• June 10, 2025
• Online
• https://www.meetup.com/functionalworld/events

We’re back again with Functional World, and this time we’ve got Li Haoyi in the house. He’ll be conducting a live coding session, demonstrating how Mill can make your Scala builds faster, simpler, and less painful compared to SBT. If you’ve ever struggled with Scala build tools, this one’s for you – come hang out and learn from the guy behind Mill and the “com-lihaoyi” stack.

Zurich Scala Enthusiasts | Scala talks 

• June 3, 2025
• Zurich,  Switzerland
• https://www.meetup.com/zurich-scala/events

Zurich Scala is hosting another in-person meetup, and this one’s all about functional programming and practical Scala! Expect a mix of real-world code, functional concepts, and the usual post-talk discussions with fellow Scala developers. If you’re into Scala or just curious, come hang out – always a good time, and you might even learn something new.

Scala-Pils 

• June 4, 2025
• Oslo, Norway
• https://www.meetup.com/scalabin/events

ScalaBin’s monthly Scala-Pils meetup is happening again on June 4th in Oslo. It’s all about casual programming chats over good beer with good people. No formal talks – just a relaxed evening with fellow Scala enthusiasts. If you’re in town, swing by Nedre Foss Gård and join the conversation. 

Amsterdam.scala | Talks and Drinks with Haoyi Li 

• June 5, 2025
• Amsterdam, Netherlands
• https://www.meetup.com/amsterdam-scala/events

Amsterdam Scala is hosting another chill meetup this June, all about Scala, functional programming (FP), and whatever else comes up when Scala devs gather. It’s at ING HQ again, so expect some great conversations, interesting tech topics, and possibly some drinks. If you’re in Amsterdam, this is an excellent opportunity to connect with fellow Scala enthusiasts and exchange ideas.

Women in Scala | London Scala User Group 

• June 11, 2025
• London, UK
• https://www.meetup.com/london-scala/events

London Scala is hosting a special Women in Scala meetup – this one’s all about exploring functional programming through creative coding. It’s a beginner-friendly session using Creative Scala, so if you’re curious about Scala or just want a chill, hands-on coding night, this is for you.
Expect a welcoming vibe, some snacks, and good conversations. 

ScalaBridge Online 

• June 12, 2025
• online
• https://www.meetup.com/scalabridge-london/events

If you’re just getting started with Scala or want to brush up your skills in a relaxed, supportive space, ScalaBridge London is the place to be. It’s a friendly, low-pressure coding night with Scala enthusiasts of all levels. Perfect for asking questions, learning by doing, and building confidence. Bring your laptop, your curiosity, and join the fun!

Krakow Scala User Group | Scala Meetup after Lambda Days

• June 13, 2025
• Cracow, Poland
• https://www.meetup.com/krakow-scala-user-group

Krakow Scala User Group is back! Although they will share more details later, we know for sure that Martin Odersky will join as one of the speakers, alongside Zainab, a functional programming enthusiast and educator, currently working on aquascape.
As always, good talks, good people, and good vibes guaranteed.

Dallas Scala Enthusiasts | Let’s teach LLMs to write great Scala!

• June 13, 2025
• online
• https://www.meetup.com/dallas-scala-enthusiasts/events

Dallas Scala Enthusiasts are back this June with a special online session featuring Kannupriya Kalra (you can remember her from our last Functional World meetup), maintainer of the LLM4S project. She’ll walk us through how LLMs can be taught to write robust Scala code.
If you’re into AI, functional programming, or just curious about how Scala fits into the LLM landscape, this one’s for you.

Software Architecture

DDD Europe 2025

• June 4-6, 2025
• Antwerp, Belgium
• https://dev.events/conferences/ddd-europe-2025-prxwwjkj

DDD Europe 2025 is taking place from June 4 to 6 in Antwerp, and it’s an event for anyone interested in software modelling, architecture, and strategy. With over 90 speakers, including industry leaders like Eric Evans, Chelsea Troy, and Chris Richardson, expect a mix of talks and hands-on labs covering everything from DDD patterns to AI-accelerated legacy modernisation. 

DevSum

• June 12-13, 2025
• Stockholm, Sweden
• https://www.devsum.se/

From DevSum 2025 expect a solid mix of talks on software architecture, cloud, AI, frontend, backend, and of course, a healthy dose of functional programming (Scala fans, you’ll feel at home). The lineup’s looking great, and the vibe is always fun and community-driven.
If you’re up for learning, sharing ideas, and hanging out with developers from all over, see you there!

Joy of Coding 2025

• June 27, 2025
• Rotterdam, Netherlands
• https://dev.events/conferences/joy-of-coding-2025-fq9tskqa

Joy of Coding is bringing together devs who just love to code. It’s a one-day, single-track event packed with talks from notable figures, including the creator of cURL and DuckDB, plus plenty of time for networking, chats, and inspiration.
If you’re into the craft of coding, you’ll feel right at home.

Frontend

Frontend Nation 

• June 3-5, 2025
• online
• https://frontendnation.com/

This free, three-day event features over 45 speakers, including industry leaders such as Kent C. Dodds, Angie Jones, and Minko Gechev. Dive into talks on React, Angular, Vue, Svelte, DevTools, and AI, with live coding sessions, expert panels, and networking opportunities.
Whether you’re looking to sharpen your skills or explore the future of frontend development, this is the place to be.

WarsawJS Meetup #127

• June 11, 2025
• Warsaw, Poland
• https://crossweb.pl/en/events/warsawjs-meetup-127-onsite/

WarsawJS is back for their 127th meetup, and it’s all happening onsite! If you’re into JavaScript, TypeScript, or anything web-related, come hang out, meet other devs, and learn something new.
No matter your level, there’s always something cool to take away.

JSNation 

• June 12-16, 2025
• Amsterdam, Netherlands / online
• https://www.eventyco.com/event/jsnation

JSNation 2025 will take place from June 12 to 16 in Amsterdam and online. This hybrid event brings together JavaScript developers in person and online, featuring 50+ speakers from the JavaScript ecosystem.
With workshops, networking opportunities, and even a JS art exhibition, it’s a must-attend for anyone passionate about JavaScript.

Middlesbrough Front End Conference 

• June 12, 2025
• Middlesbrough, UK
• https://www.middlesbroughfe.co.uk/events/conferences/2025

Middlesbrough Front End 2025 is scheduled to take place on June 12. Expect talks on everything from AI-driven UX to modern CSS, Vue, React Three Fiber, and accessibility testing. Speakers include folks from Chrome, DevRel, and the open-source world.
If you’re into frontend, this is the place to be.

React Norway 2025

• June 13, 2025
• Oslo, Norway / online 
• https://reactnorway.com/

This one-day conference focuses on React, frontend trends, and the development of innovative web applications. Expect a mix of talks, community vibes, and a bit of scenic fjord inspiration.
If you’re into React and want a break from the usual conference grind, this one’s worth the trip!

React Summit | 10th anniversary

• June 13-17, 2025
• Amsterdam, Netherlands
• https://reactsummit.com/

One of the biggest React conferences is having its 10th anniversary. This year, expect a React Summit packed lineup of talks from some of the best in the React community, as well as in-depth discussions on React, TypeScript, state management, and the latest frontend trends. Plus, there’s plenty of space for networking, chats, and soaking in that Amsterdam vibe.

NG Rome Conference

• June 19-20, 2025
• Rome, Italy
• https://dev.events/conferences/ng-rome-conference-gapnigxr

NG-Rome returns in June 2025, bringing together Angular fans in the heart of Rome. It’s a day full of deep dives into Angular, frontend best practices, and a sneak peek into what’s next for the framework. Great talks, amazing community vibes, and yes, good coffee and pizza, too. If you’re into Angular, this is the conference for you!

Conclusion 

Whether you’re tuning in online or grabbing drinks at your local meetup, June is full of chances to sharpen your skills and hang out with some brilliant (and fun) people.

Stay curious, stay connected, and keep building awesome things. See you out there!

Explore new career opportunities

Ready for your next professional challenge? Discover the latest job openings at Scalac!

• Senior Scala Engineer w/Cats
• Platform Engineer
• Senior Rust Engineer

Or apply to Scala Talent Pool – send your CV, and we’ll contact you whenever a project matching your skill set comes up!

Previous Scalendar Editions

• Scalendar January 2025
• Scalendar February 2025
• Scalendar March 2025
• Scalendar April 2025
• Scalendar May 2025