Scala Days 2025, August, Lausanne: Code, Community & Innovation
In 2025, Scala Days is coming to Lausanne, Switzerland, on August 19 – 21, and we’re excited to be part of it again – but this time as Gold Sponsors.
Scala unites those who care about doing things right – a global community of developers and engineers passionate about functional programming, performance, and solving real-world problems. And once a year, this community comes together to share ideas, challenges, and inspiration at one special event – Scala Days.
Whether you’re a long-time contributor or just joined the Scala ecosystem, this conference has something for you. From deep technical talks and real-world use cases to hallway conversations and Lake Geneva views, Scala Days is the place to be.
So what can developers expect this year? And why should you absolutely swing by the Scalac booth?
Let’s dig into it.
Why Scala Days stands apart
This isn’t your typical tech conference with recycled content and vendor pitches. Scala Days brings together the architects behind the tools you use daily, from library maintainers to engineers running Scala in production at companies like Netflix and Twitter.
The numbers speak volumes: Over 500 developers, 50+ speakers across four tracks, and sessions covering everything from performance optimization to cutting-edge AI applications.
You’ll gain insights that take months to discover through trial and error, learn from real-world failures (and how to avoid them), and connect with peers facing similar architectural challenges.
Talks that solve real problems
Scala Days 2025 features a packed agenda with developer-focused talks that share practical lessons from real-world experience. Here’s what we’re particularly excited about:
- Our CTO’s deep dive: Akka performance anti-patterns
Łukasz Marchewka presents “Akka Unplugged: the anti-patterns that kill performance (and how to fix them)” (Aug 20, 14:30 – 15:10).
This talk will explore performance pitfalls in Akka-based applications – the kind that are easy to overlook and hard to debug. You’ll leave with practical tips and architecture patterns you can apply right away. Whether you’ve been working with Akka for years or just getting started, this session will be packed with value.
- Domain-driven design gets practical
The workshop “Domain Driven Design in Scala 3” by David Amancio Gil Méndez transforms DDD theory into working code. Perfect for teams struggling to bridge business requirements and technical implementation.
- AI meets functional programming
Kannupriya Kalra and Rory Graves talk “Scala Meets GenAI: Build the Cool Stuff with LLM4S“, demonstrating how to build production-ready AI applications using Scala. ,,Whether you’re building tools for developers, enterprises, or creative applications, this talk will show you how to harness the full power of GenAI in the coolest language: Scala”.
- Build tools that don’t fight you
“Easy Scala Builds with the Mill Build Tool” by Li Haoyi addresses every team’s pain point: build complexity. Learn how the Mill Build tool can potentially save you hours of work.
These talks are a goldmine for discovering what works, what doesn’t, and how teams handle architectural trade-offs.
Check the full agenda here: https://scaladays.org/schedule
Stop in, speak up: help us create the State of Scala 2025 Report!
For over a decade, we’ve been building scalable, high-performance systems with Scala, solving real-world problems and helping companies turn complex challenges into clean, efficient solutions. We know the true power of this language lies in its community. That’s why we’re bringing a dedicated Scalac booth to the event, where you can:
- Meet the team – stop by and say hello to our CTO Łukasz Marchewka, and our sales team (Tomasz Bogus and Anton Galynya)!
Whether you want to discuss architectural trade-offs, share war stories, or debate the best Scala memes! - Take the Scala Quiz – how deep is your Scala knowledge? Test your skills in our fun Scala quiz and compete with fellow attendees for prizes.
- Contribute to the State of Scala 2025 survey! – This year, we’re preparing the State of Scala 2025 report – a collaborative project with Scala Days organizers. And we need your input!
Your voice helps shape the future of Scala – FILL OUT THE FORM!
By answering just a few quick questions about your experience with Scala, favourite libraries, tooling, and challenges, you help us create a report that reflects the reality of Scala development today.
It only takes a few minutes, and every response counts!
Location, landscape and the Lausanne experience
Let’s not forget that Scala Days 2025 is happening in Lausanne, Switzerland – one of the most picturesque locations the conference has ever seen. Think lake views, slow walks, historic architecture, and chocolate. And don’t forget cheese!
Beyond the sessions, there’ll be plenty of chances to network, socialize, and recharge, whether over a local brew at a community dinner or during a lakeside walk with fellow devs.
Pro tip: If Lausanne’s new to you, give yourself some breathing room with an extra day before or after Scala Days. Your future self will thank you! ;)
Scala Days 2025 – the one Scala event you can’t afford to miss:
Here’s a quick summary of why we think you should join us in Switzerland this August:
- Learn from real-world, production-grade talks
- Get insights into Scala’s evolving ecosystem
- Meet the people behind the libraries you use
- Take part in building the State of Scala 2025
- Visit the Scalac booth for fun, swag and meaningful conversations
- Hear our CTO break down Akka performance anti-patterns
- Enjoy Switzerland with a few hundred passionate Scala devs
For questions, ticket help, or to chat before the event, reach out to us.
Want a special Scalac discount? Contact Anton Galynya or fill out our Ticket Form.
See you in Lausanne!
