Ismael Juma & Alois Cochard Designing a REST API for multiple applications and devices is typically an exercise in trade-offs. A single API offers efficiency in terms of building and maintenance costs; specialised APIs, though tedious to build, can be opt...

Ever dreamed of writing you next Rich Internet Application in Scala, enjoying all the Scala goodness, but not sacrificing JavaScript interoperability? Then come and meet Scala.js, a JavaScript backend for Scala. Scala.js compiles full-fledged Scala code do...

Andrew Phillips & Nermin Serifovic One of the most advanced programming languages of today has surely outgrown the gotchas, puzzlers and head-scratchers of the past. Really? Scala Puzzlers returns with a totally new range of seemingly simple examples whic...

Christopher Vogt & Stefan Zeiger Slick is not an object-relational mapper, but a functional-relational mapper leading to unique benefits. Using Slick efficiently may be counter-intuitive to people familiar with ORM systems. This talk explains how common O...

Scala provides a wide variety of productivity- and correctness-enhancing features, but some of those come at the cost of performance. I will discuss how to design Scala applications to take maximal advantage of Scala's best features while still yielding Ja...

The decipherment of Mesoamerican hieroglyphic writing systems advanced at previously unparalleled rates in recent decades. One of the keys to this success is the application of methodologies developed and applied successfully to other writing systems. The ...

Asynchronous IO is one of the most important building blocks when designing high-performance systems. Over the years various patterns emerged on top of the selector based services provided by the operating system. In this talk I will give a quick overview ...

Spark Streaming is a new extension to the Spark cluster computing framework that enables high-speed, fault-tolerant stream processing through a high-level Scala API. It builds on a new execution model called "discretized streams" to provide exactly-once pr...

Polymorphic function values are one of the key abstractions in shapeless: they are crucial to enabling sequence-like operations such as map, flatMap and filter to be performed on HLists (data structures which combine the heterogeneous typing of tuples with...

Philipp Haller & Jason Zaugg Ever wished the compiler could make asynchronous programming easier? Enter Scala Async. Do asynchronous I/O like “normal” blocking I/O, program with Futures and Promises even more naturally! Scala Async makes it possible to “s...

Despite unifying frameworks like Akka, distributed systems often look like a patchwork of special-purpose tools, libraries, and frameworks. For example, the essential task of persisting objects by pickling (or serializing) them to a binary or text represen...

The Spring Framework is one of the most popular Java frameworks used today. While it is possible to use Spring in Scala, it does feel awkward in certain places, because of the "Javaism" peering through. For instance, using callback interfaces feels strange...

In this talk, we discuss some interesting extensions to the cake pattern as described in Real­World Scala: Dependency Injection (DI) by Jonas Bonér. We consider the use of the cake pattern to express hierarchical components, and the high­level design const...

With IntelliJ IDEA frequently called the most intelligent Java IDE, JetBrains is working to replicate similar levels of code assistance and developer tools for Scala. This presentation will showcase some of the IDE’s trickiest features that help developers...

Scala continues to be fun! Implementing algorithms to solve Sudoku puzzles, bioinformatic problems, and analyzing time-series data has been a great learning experience. Creating video games and mods have made my game time much more enjoyable and gave me an...

Announced right before 2.10.0-final, macro paradise became the home for experimentation in the macro land. In this talk I will cover the ideas we played with and outline what panned out and what did not. What's going to happen to quasiquotes? Are type macr...

In this session we will have a round at all new functionalities introduced in the latest sand greatest Scala IDE V3.0 release, and outline the future direction of the tool. Semantic highlighting, implicit highlighting, and a new shiny Scala debugger are t...

A case study of how Scala and Akka helped a team of software developers without a whole lot of distributed system programming experience build a fairly sophisticated, production quality distributed system with a custom multipaxos implementation at its core...

It's 2018. Scala is now 15 years old and the dominant programming language for enterprise apps. But how did we get here? What hurdles did we tackle and what hurdles tackled us?

Realtime Web Applications are applications making use of Websockets, Server Sent Events, Comet or other protocols to offer an open socket between the browser and the server for continuous communication. Several web frameworks target the development of this...

A lens represents a readable and "settable" location in a possibly nested immutable object. Lenses aren't in the Scala standard library, but several libraries provide them, including Scalaz and Shapeless. I'll show how you to use the Shapeless version, and...

Jan will show how to use RabbitMQ to connect components on different platforms. After a few introductory slides explaining the main concepts, the rest of the talk will be live code. The coding will begin by showing simple Scala / Akka code to connect to Ra...

Profile-driven JIT compilers like those in most JVMs provide good performance on average, but they are a black box with highly nondeterministic behavior. Thus, achieving top performance, predictably and consistently, is very hard. This talk will present La...

As the author of an open-source serialization library in Scala, I've undergone a lot of struggle to understand and harness the power of Scala's type system. My library was based on parsing pickled Scala signatures, which was a subterranean and sparely docu...

Scala's mix of functional and object oriented programming paradigms is ideal for building data pipelines. Many smart people have noticed this, and as a result, we now have three distinct APIs for creating MapReduce pipelines in Scala (Scrunch, Scoobi, and ...

Reactive Architectures are the next major evolution of the Internet. They allow for applications to be built in a completely non-blocking, asynchronous, and reactive manner. The Play Framework fully embraces this new paradigm of programming which allows de...

Versal is an edtech platform. We have a full Scala backend for RESTful API and a JavaScript frontend. In this talk we outline the whole trajectory from nothing to a working company where Scala does the heavy lifting. We describe the event sourcing archite...

Matei Zaharia & Reynold Xin As big data becomes a concern for more and more organizations, there is a need for both faster tools to process it and easier-to-use APIs. Spark is a Hadoop-compatible cluster computing engine that addresses these needs through...

Ruby has a long history of "making the developer happy" by allowing for ease of programming and prototyping. Rails has taken off by storm and allowed startup companies to quickly create web applications that solve features required by the business. However...

Jamie Allen, Björn Antonsson, Patrik Nordwall In the brave new world of actor programming conventional design patterns frequently are not applicable, as is witnessed by questions we get on the mailing list and at conferences. That is why we have collected...

Traditionally in order to write applications that run across heterogeneous hardware, programmers must manually combine code for multiple programming models together in ad-hoc ways. Domain-specific languages (DSLs) offer an alternative approach, as high-lev...

Scala is one of the most feature rich, expressive and flexible languages around at present. It offers more ways to solve a problem than virtually any other language around, since it mixes Object Orientation, Functional Programming, Static Typing and much m...

I've been tasked with building a large, complex, data-driven application that has a rich HTML5, CSS, jQuery UI featuring drag and drop, real-time feedback, and much more and I've done it all using Play, Scala, and Akka. In this session I'll discuss my expe...

Christopher Severs & Vitaly Gordon Machine learning turns data into predictions about the real world in an almost magical fashion. In this talk we'll show why Scala is a great language for machine learning practitioners and show the audience of Scala prog...

Viktor Klang & Roland Kuhn With a plethora of different concurrency programming models available to developers today, in this talk, we'll put on our haz-mat suits and explore the different models–getting a 360 degree view on what's good, what's bad and wh...

You don't yet speak Scala? Then let us invite you to a journey on which we will explore the outstanding features of this programming language for the Java Virtual Machine. As an introduction we will briefly talk about Scala's key characteristics. Then we w...

The currently developed upcoming Lift 3 (Scala 2.10+) contains innovative ways to craft web applications, like for instance actors that communicate between JS client and Lift server. The talk will demonstrate the new features of Lift 3 on one side and als...

The skills of building Scalable, Highly Concurrent and Fault-Tolerant Systems are becoming increasingly important in our new world of Cloud Computing, multi-core processors, Big Data and Real-Time Web. Unfortunately, many people are still doing it wrong; u...

An Introduction and dive into the best practices of creating and maintaining builds in SBT, including how to debug a broken build. During the talk, we'll set up a non-trivial project including an Akka backend and Play frontend, both communicating to each o...

This talk will give you an brief overview of the BigData tooling landscape and where Scoobi, a distributed collection Scala library for Hadoop, stands. Then we'll see what are the challenges in translating Scoobi abstractions to Hadoop constructs and how S...

Scala gives you awesome expressive power, but how to make best use of it? In my talk I will discuss the question what makes good Scala style. We will start with syntax and continue with how to name things, how to mix objects and functions, where (and where...