Scala Days

Time to meet again 🥰 🙌 Scala Days 2026 🗓️ Conference 12 - 13 October 🛠️ Workshops 14 - 15 October 📍Berlin, Germany Looking forward to welcoming you this autumn! scala-lang.org/blog/2026/03/2…

✨ Tracking effects and dependencies can quickly get subtle. This talk explores what it means to stay “on track” with tracked values and why it matters. Here’s "On track with tracked" by Kacper Korban youtube.com/watch?v=5WXiA8…

🔍 Growing functional programmers takes more than teaching syntax. This keynote reflects on how people actually learn FP and how to help that growth happen. Watch "Keynote: How to Grow More Functional Programmers" from Evan Czaplicki youtube.com/watch?v=9OtN4i…

🤖 Workflows tend to sprawl unless they’re designed carefully. This session looks at defining and running workflows in Scala with MeshCI. Check out "MeshCI: defining and running workflows in Scala" from Jakob Odersky youtube.com/watch?v=sxxYji…

🧪 The Typelevel ecosystem has shaped how many of us write Scala today. This talk looks back at where it started, what it became, and what we learned along the way. Here’s "A Typelevel retrospective" by Arman Bilge youtube.com/watch?v=51kW8z…

💡 Bridging the gap between code and business requirements is rarely clean or straightforward. This talk looks at Business4s to connect developers and business thinking. Watch "Business4s: Bridging the Gap Between Devs and the Business" from Voytek Pituła youtube.com/watch?v=eIw9Tk…

✨ Large codebases don’t refactor themselves. This session explores Regenesca and how automated source-code refactoring can help keep Scala projects maintainable. Here’s "Regenesca - Refactoring Generator of Source Code for Scala" by Sakib Hadžiavdić youtube.com/watch?v=hVdMtx…

💡 Unsafe Rust raises strong opinions for a reason. This keynote digs into what “unsafe” really means, why it exists, and how to reason about it. Check out "Keynote: What's the deal with unsafe Rust?" from Ralf Jung youtube.com/watch?v=YwABQ9…

✨ Spec-first APIs don’t have to mean heavy code generation. This session shows how far you can get by leaning on imports and types instead. Here’s "Just Import 'N' Go: Spec-first APIs without codegen" by Tomas Mikula youtube.com/watch?v=BizzXu…

🧪 Curious how compilers actually work under the hood? This talk makes a case for learning compiler engineering as a way to become a stronger programmer overall. Here’s "Become a Compiler Engineer (and a Better Programmer)" by Jan-Pieter van den Heuvel youtube.com/watch?v=fZerJ7…

🤖 sbt 2.0 is a major shift under the hood. This session dives into what’s changing, why it matters, and what “going big” really means. Check out "sbt 2.0: go big" from Eugene Yokota youtube.com/watch?v=GM2ywM…

🔍 Capture checking keeps moving from theory toward practice. This talk focuses on the first concrete steps and what they enable in real Scala code. Watch "The first steps towards practical capture checking" from Cao Nguyen Pham youtube.com/watch?v=23bIrT…

💡 Building libraries that run at Netflix scale comes with very real constraints. This talk walks through designing a Scala 3 library that powers QoE systems in production. Watch "Designing the library powering Netflix's QoE with Scala 3" from Joan Goyeau youtube.com/watch?v=F0czrr…

💡 Learning Scala isn’t always a straight line. This talk shares a personal journey through Scala and drumming, with all the parallels, struggles, and small wins along the way. Check out "From Paradigms to Percussion:" from Priyanka Bose youtube.com/watch?v=9e3R8v…

✨ Big-picture questions matter just as much as new features. This keynote reflects on where Scala stands today and how its capabilities are shaping real-world use. Here’s "Keynote: Where Are We With Scala's Capabilities?" by Martin Odersky youtube.com/watch?v=p-iWql…

🔍 Some systems run on rules nobody ever writes down. This session explores how to model and implement those unspoken rules using Scala 3. Watch "Coding the game of unspoken rules in Scala 3" from Adrien Piquerez and Benoît Fouré youtube.com/watch?v=OmN1T6…

🤖 HTTP routing is one of those problems that looks simple until it isn’t. This talk walks through routing HTTP requests using Scala 3, focusing on clarity and correctness. Check out "Routing Http Requests with Scala 3" from Noel Welsh youtube.com/watch?v=RzIESF…

🧪 Tooling makes a huge difference in how Scala feels day to day. This session dives into Metals and how to get the most out of it. Here’s "Unleashing the Full Potential of Metals" by Tomasz Godzik youtube.com/watch?v=y18_oH…

🧪 Scala sometimes ends up far from traditional software. This talk dives into chip design and how Scala was used from early ideas to real hardware. Here’s "Scala Chip Design from Z1R0 to H1R0" by Oron Port youtube.com/watch?v=5VdlKg…

✨ Serializing closures sounds risky, but it doesn’t have to be. This session walks through a simple and safe approach to pickling closures in Scala 3. Here’s "Simple and Safe Pickling of Closures in Scala 3" by Jonas Spenger and Philipp Haller youtube.com/watch?v=9Fw0iQ…