Messaging and Connecting Services && HTTP Headers - A Research Expedition

Web Engineering Düsseldorf
Web Engineering Düsseldorf
Öffentliche Gruppe

trivago Campus

Kesselstr. 5-7 · Düsseldorf

Wie du uns findest

From DUS Mainstation: Tram 707 in direction "Medienhafen, Kesselstraße" (last station)

Bild des Veranstaltungsortes


In January, we will be sponsored by trivago ( and do an evening with two talks.

• Messaging & Connecting Services (by Arndt Droullier)
• HTTP Headers - A Research Expedition (by Christian Schaefer)

+++ Agenda +++
• 18:30 - 19:00: Arrival, get a drink and socialize
• 19:10 - ~19:40: Talk #1 + Q&A
• 19:55 - ~20:25: Talk #2 + Q&A
• 20:25 - Open End: Socialising

+++ Messaging & Connecting Services (by Arndt Droullier) +++
An overview of concepts and tools for internally connecting and communicating services.
Due to the rapid development in the area of virtualization of servers and applications in recent years, the concept of implementing applications as distributed services has become more and more established.
For all advantages and disadvantages, the requirement to connect services internally and enable communication comes inevitably as result of the architecture.
There are many tools to solve it (old and new), but the application scenarios vary widely.
In this context, here's a short one overview with examples of different tools and concepts like Redis, RabbitMQ, Kafka, Celery and ReactiveX programming.

Arndt Droullier, Cologne, web developer and owner of Nive GmbH (, focuses on minimalistic web frameworks, service development and web api concepts. Experience is founded on 20 years web/software projects and development of BaaS-platform Also organising a GraphQL Meetup (

+++ HTTP Headers - A Research Expedition (by Christian Schaefer) +++
Every call we send to and receive from a web server is accompanied by more or less metadata, also known as the HTTP headers. Usually, those headers stay hidden in the shadows and we barely notice them. Only when things start to behave in inexplicable and weird ways do we start to peek into their wondrous world. And even then we only get to see and know their most prominent figures. But are there more, further out? What creatures live there almost forever but were forgotten by us humans? And how has the eco-system evolved since the last time somebody has mapped it out? And finally: how does all of this affect us?

Christian Schaefer (, known as "Schepp", is a freelance frontend developer from Düsseldorf. Instead of hacking around with JS-Frameworks as almost every other frontend developer currently does, he works on traditional server-rendered component-based systems, uses bleeding edge CSS, has an eye on accessibility and loading and rendering performance of a site. And then he also runs a meetup ( and a podcast (