J on the Beach, Málaga
Oct 29–30, 2026

Deterministic testing of concurrent systems

Presentation.

Cardano Developer Office Hours
Mar 13, 2026

Amaru and node diversity

With Matthias Benkort, Eric Torreborre, and Eluard.

codemotion, Milan
Oct 14–15, 2025

Simulation Testing a Cardano Node

Presentation.

Node diversity workshop #2, Toulouse
Sep 22–23, 2025

Amaru simulation environment

Presented the simulation environment.

Node diversity workshop #1
Apr 2025

Back-pressured processing networks and testing

Sessions on Amaru and Leios testing.

J on the Beach, Málaga
May 8–10, 2024

Building local-first cooperative swarm systems with Actyx

Presentation.

PLF, Lisbon
Oct 24, 2023

Local-first at Actyx

Presentation.

ECOOP, Seattle
Jul 17–21, 2023

Behavioural Types for Local-First Software

Presentation of a paper.

J on the Beach, Málaga
Apr 27–29, 2022

Peer-to-peer Event Sourcing on mobile & edge devices

Presentation.

Reactive Summit
Nov 10, 2020

Local-First Cooperation: Reactive, but neither IoT nor Decentralisation

Presentation. View the slides or watch the video recording.

scala.world
Sep 2–3, 2019

Meshing robots and humans with distributed apps

Presentation. Watch the video recording.

CommitPorto, Porto
Jun 22, 2019

What if You Need Reliability Comparable to Paper?

Presentation. Watch the video recording.

J on the Beach, Málaga
May 15–19, 2019

What if You Need Reliability Comparable to Paper?

Presentation. Watch the video recording.

Scalawave, Gdánsk
Sep 6–8, 2018

Real production use: Reactive design for the manufacturing industry

Presentation.

J on the Beach, Málaga
May 23–25, 2018

Real production use: Reactive design for the manufacturing industry

Presentation. Watch the video recording.

f(by), Minsk
Dec 17, 2017

Type-level State Machines for Detailed Effect Checking

Presentation. Watch the video recording.

Scalawave, Gdánsk
Jul 7–8, 2017

Formal protocols for Akka Typed

Presentation. Watch the video recording.

ScalaDays, Copenhagen
May 30–Jun 2, 2017

Formal protocols for Akka Typed

Presentation. Watch the video recording.

J on the Beach, Málaga
May 17–19, 2017

Formal protocols for Akka Typed

Presentation. View the slides.

scalawave, Gdansk
Nov 25–26, 2016

Distributed Systems vs. Compositionality

Keynote. Watch the video recording.

scala.world, Lake District
Sep 12–13, 2016

Distributed Systems vs. Compositionality

Presentation. View the slides, watch the video recording.

J on the Beach, Málaga
May 20–21, 2016

Reactive Design Patterns

Presentation. View the slides, watch the video recording or the interview.

Code Mesh, London
Nov 3–4, 2015

Reactive Design Patterns

Presentation. Watch the video recording.

W-JAX, München
Nov 3–5, 2015

Reactive Design Patterns

Presentation.

Java Forum Nord, Hannover
Oct 6, 2015

Projekt Gålbma: von Aktoren und Typen

Presentation (German).

CurryOn, Prague
Jul 6–7, 2015

Akka Typed: Between Session Types and the Actor Model

Chess Timer Talk. Watch the presentation or view the slides.

ScalaDays Amsterdam
Jun 8–10, 2015

Project Gålbma: Actors vs. Types

Presentation. See also the slides or watch the video recording.

ScalaDays San Francisco
Mar 16–18, 2015

Akka HTTP: the Reactive Web Toolkit

Presentation. Watch the video recording. The code is available on github.

GOTO Berlin
Nov 6–7, 2014

Handling Data-Flow the Reactive Way using Akka Streams

Presentation. Also Scala user group meeting on Thursday evening.

W-JAX, München
Nov 4–6, 2014

Reactive Streams: Handling Data-Flows the Reactive Way

Presentation.

Scala.IO, Paris
Oct 23–24, 2014

Distributed in Space and Time

Keynote.

Nordic Coding, Kiel
Sep 30, 2014

Handling Data-Flow the Reactive Way using Akka Streams

Presentation.

Scalapeño, Tel Aviv
Sep 22–23, 2014

Distributed in Space and Time

Keynote. You can browse the slides or watch the video recording.

Trivento Summer Camp,
Amsterdam
Aug 29, 2014

Go Reactive: Blueprint for Future Applications

Keynote. You can browse the slides or watch the video recording.

Akka and Angular: Reactive Applications in Practice

Presentation. You can browse the slides or watch the video recording. The code shown is available on github.

ScalaDays, Berlin
Jun 16–18, 2014

Reactive Streams: And why you should care.

Watch the Presentation (together with Viktor Klang).

33degree, Krakow
Jun 9–11, 2014

Go Reactive: Blueprint for Future Applications

Watch the Presentation.

BigTechDay, München
May 23, 2014

Reactive Streams

Watch the Presentation.

Typesafe webinar
May 7, 2014

Introducing Reactive Streams

Watch the video on youtube. View the slides.

PhillyETE, Philadelphia
Apr 22–23, 2014

Go Reactive: Blueprint for Future Applications

Presentation. View abstract. View the presentation: ChariotSolutions / InfoQ.

Reactive Streams: Handling Data-Flows the Reactive Way

Presentation. View abstract.

JavaLand
Mar 25–26, 2014

Go Reactive: Blueprint for Future Applications

Presentation.

JFokus, Stockholm
Feb 3–5, 2014

Go Reactive: Blueprint for Future Applications

Presentation. View abstract.

Scala Days, New York
Jun 10–12, 2013

Concurrency — the Good, the Bad and the Ugly

Presented together with Viktor Klang. Watch the video.

010dev, Rotterdam
Apr 2, 2013

Distributed by Design

View the slides.

NEScala, Philadelphia
Feb 8–9, 2013

Akka Typed Channels: Implementing Type Calculations as Macros

Watch the video or view the slides.

Scala eXchange, London
Nov 19–20, 2012

Akka Coltrane: Rise of the Cluster

Watch the video. I also was also part of the Park Bench Discussion from around minute 12.

Java One, San Francisco
Sep 30–Oct 5, 2012

Testing Event-Driven Systems

Watch the video (as soon as Oracle is back from maintenance).

Scala Days, London
Apr 17–18, 2012

Testing Actors and FSMs in Akka

Watch the video.

Software Passion Summit, Gothenburg
Mar 19–20, 2012

Akka: Distributed by Design

See the abstract.

Scalathon, Philadelphia
Jul 15–17, 2011

Hakking Akka

A community hackathon. Watch the presentation.

Java Vienna
Jan 20, 2020

From Akka Persistence to Factory Automation

Presentation.

Reactive Systems Hamburg
May 30, 2017

Taming communication protocols with Akka Typed

Presentation.

BeScala, Leuven
Aug 24, 2016

News on Akka Typed

Presentation. Watch the video.

Reactive Systems Hamburg
Feb 17, 2016

Reactive Design Patterns

Presentation. Watch the video.

Zalando, Berlin
Jan 14, 2016

Reactive Design Patterns

Presentation.

Scala User Group Cologne
Nov 26, 2015

Reactive Design Patterns

Presentation. Read the abstract.

Amsterdam.scala
Nov 16, 2015

Project Gålbma: Actors vs. Types

Presentation. Read the abstract.

Scala User Group Munich
May 18, 2015

Type-Safe Actor Interations with Akka Typed

Presentation. Watch the video.

Java User Group Ostfalen, Braunschweig
May 5, 2015

Akka Grundlagen und Überblick

Presentation.

Java User Group Hessen, Kassel
Mar 26, 2015

Reaktive Anwendungen entwickeln mit Akka HTTP

Presentation.

Hamburg Akka Meetup
Jan 13, 2015

Akka Streams and HTTP

Presentation.

Berlin Scala User Group
Nov 7, 2014

Exactly-Once Messaging with Akka

Presentation with livecoding. The code is available on github.

Philly Area Scala Enthusiasts
Apr 24, 2014

Go Reactive and other topics

Q&A and live-coding session

Working Draft
May 5, 2020

Revision 423: Reactive Systems

German podcast.

Typesafe webinar
Jun 16, 2015

Reactive Streams 1.0.0 and why you should care

Watch it here. See also the slides.

Typesafe webinar
May 7, 2014

Introducing Reactive Streams

Watch it here. See also the slides.