Web Engineering Düsseldorf

## +++ What is Hacktoberfest?
Hacktoberfest is DigitalOcean’s annual event that encourages people to contribute to open source throughout October. Much of modern tech infrastructure relies on open-source projects built and maintained by passionate people who often don’t have the staff or budgets to do much more than keep the project alive. Hacktoberfest is all about giving back to those projects, sharpening skills, and celebrating all things open source, especially the people that make open source so special.

For the past 10 years, thousands of people—coders and non-coders alike—have participated in Hacktoberfest to support the projects they use and love, learn and practice skills that will enhance their careers, and meet new people who love open source as much as they do.

## +++ Hacktoberfest in Düsseldorf!
Our sponsor CHECK24 has celebrated Hacktoberfest with internal events in previous years. In 2023, they are making it bigger and opening their doors to the outside world. Celebrating open source and the community is the primary factor. It's explicitly not about recruiting but about having a good time.

## +++ What do we do at this event?
Meeting in person and ...

• hacking together and contributing back to open-source
• show and tell (go on stage and show what you are working on?)
• helping new people to land their first pull request and their first open-source contribution
• learning from each other

## +++ What do you need?

Bring the equipment you need to develop software and contribute to the open-source community like your Notebook/Laptop.
Don't forget it ;)

## +++ I don't know what I should work on :( ...
Don't worry. We will help you to find the right project to contribute to, based on your skills.
Maybe there are other people who want to do pair programming and a group will be built. We make it happen :)

## +++ How to get there
Public transport

• Station "Heinrich-Heine-Allee U": Subway U70, U71, U72, U73, U74, U75, U76, U77, U78, U79, U83

Parking

• We can't offer parking spots. We suggest using public transport.

## +++ Important to know

• Attendance is free
• Language of the event: German and English
• WiFi: Available
• Food and drinks are free and available
• Costs: Free

## +++ What is Hacktoberfest?
Hacktoberfest is DigitalOcean’s annual event that encourages people to contribute to open source throughout October. Much of modern tech infrastructure relies on open-source projects built and maintained by passionate people who often don’t have the staff or budgets to do much more than keep the project alive. Hacktoberfest is all about giving back to those projects, sharpening skills, and celebrating all things open source, especially the people that make open source so special.

For the past 10 years, thousands of people—coders and non-coders alike—have participated in Hacktoberfest to support the projects they use and love, learn and practice skills that will enhance their careers, and meet new people who love open source as much as they do.

## +++ Hacktoberfest in Düsseldorf!
Our sponsor CHECK24 has celebrated Hacktoberfest with internal events in previous years. In 2023, they are making it bigger and opening their doors to the outside world. Celebrating open source and the community is the primary factor. It's explicitly not about recruiting but about having a good time.

## +++ What do we do at this event?
Meeting in person and ...

• hacking together and contributing back to open-source
• show and tell (go on stage and show what you are working on?)
• helping new people to land their first pull request and their first open-source contribution
• learning from each other

## +++ What do you need?

Bring the equipment you need to develop software and contribute to the open-source community like your Notebook/Laptop.
Don't forget it ;)

## +++ I don't know what I should work on :( ...
Don't worry. We will help you to find the right project to contribute to, based on your skills.
Maybe there are other people who want to do pair programming and a group will be built. We make it happen :)

## +++ How to get there
Public transport

• Station "Heinrich-Heine-Allee U": Subway U70, U71, U72, U73, U74, U75, U76, U77, U78, U79, U83

Parking

• We can't offer parking spots. We suggest using public transport.

## +++ Important to know

• Attendance is free
• Language of the event: German and English
• WiFi: Available
• Food and drinks are free and available
• Costs: Free

In October, we will be sponsored by InVision (https://www.ivx.com/) and do an evening with two talks.

• Streaming analytics for time series data that does not choke (by John Mousa)
• Fast, good and cheap - Choose two ... The CAP Theorem (by Andy Grunwald)

+++ Agenda +++

• 18:00 - 18:50: Arrival, get a drink and socialize
• 19:00 - ~19:30: Talk #1 "Streaming analytics for time series data that does not choke" + Q&A
• 19:45 - ~20:15: Talk #2 "Fast, good and cheap - Choose two ... The CAP Theorem" + Q&A
• 20:15 - Open End: Socialising

## +++ Streaming analytics for time series data that does not choke (by John Mousa) +++
The perfect test for a realtime data architecture, is how to cope with time series data from millions of devices at a heartbeat rate. In this talk you’ll see how to combine streaming services to build near-realtime insights pipelines for smart devices and telemetry data at scale. We’ll allow machine learning and analytics on data at scale without provisioning a single server using AWS serverless services. You’ll see how to use Amazon Kinesis and Apache Flink to extend the data to Data Lakes on Amazon S3 for machine learning applications and Amazon Timestream at the same time for realtime monitoring with Grafana.

About John
John Mousa has more than 16 years of extensive experience in wide range of solutions. He worked extensively with enterprise middle-wares, scalable and high velocity micro-services back-ends, and big data and analytics. He has engaged and worked with with multiple organizations from startups and non governmental organizations to leaders in digital native and enterprise services. When he’s not enabling customers on workloads, he utilizes his experience in process improvement, drive digital transformation strategies and data driven culture.
He currently enables Digital Native Businesses in addition to enterprise, highly regulated customers, and others, world wide as a Sr. Solutions Architect at AWS based in Germany. Outside of work, he loves to spend time with his family and play video games.

## +++ Fast, good and cheap - Choose two ... The CAP Theorem +++
Nearly every application out there is using a database. I am sure you also use MySQL, PostgreSQL, Kafka, Cassandra, MongoDB, or any other storage system in your app. And maybe you even run it on the cloud (or any container or application scheduler like Kubernetes), where you have endless flexibility and scalability options. In such cases, we talk about distributed systems. The truth is that distributed systems are hard, and Networks are not reliable. They (and your system) will fail, eventually.

Knowing the constraints of a distributed system before it fails will help you to ask the important questions and take actions to be prepared for a failure. The CAP theorem describes these constraints. In this talk, we will provide an easily understandable overview of the CAP theorem and look at how this can be applied to modern databases.

About Andy
Andy Grunwals is a Software Engineer and Engineering Manager passionate about Backend, Infrastructure, Reliability, and Engineering Culture. In his professional life, he works for Aiven, a Database as a Service provider, as an Engineering Manager, leading a team of Site Reliability Engineers.
He enjoys running side projects in his spare time to learn new things. Nowadays, Andy is talking about Software Engineering in the Engineering Kiosk Podcast, organizing the Web Engineering Meetup Düsseldorf, and builds sourcectl, a platform to analyze and improve your open source and inner source environment.

## +++ How to get there +++
InVision office at https://maps.app.goo.gl/qUGi21SaLqfsp9fw9

• When you arrive at the location use the stairs next to the well. We're on the ground floor of the building on the right.

Public transport

• From Düsseldorf HBF: Tram 707 (direction "Medienhafen) to "Speditionstraße", then a two min. walk.

Parking

• We don't have parking spots available. There are some car parks near by at the cinema (paid only)

## +++ Important to know +++

Attendance is free. WiFi, beer, and non-alcoholic drinks will be provided (for free as well!), and we would love to see you there :)

• Language of the event: English
• WiFi: Available
• Costs: Free
• Drinks: Available

## +++ What is Hacktoberfest?
Hacktoberfest is DigitalOcean’s annual event that encourages people to contribute to open source throughout October. Much of modern tech infrastructure relies on open-source projects built and maintained by passionate people who often don’t have the staff or budgets to do much more than keep the project alive. Hacktoberfest is all about giving back to those projects, sharpening skills, and celebrating all things open source, especially the people that make open source so special.

For the past 10 years, thousands of people—coders and non-coders alike—have participated in Hacktoberfest to support the projects they use and love, learn and practice skills that will enhance their careers, and meet new people who love open source as much as they do.

## +++ Hacktoberfest in Düsseldorf!
Our sponsor CHECK24 has celebrated Hacktoberfest with internal events in previous years. In 2023, they are making it bigger and opening their doors to the outside world. Celebrating open source and the community is the primary factor. It's explicitly not about recruiting but about having a good time.

## +++ What do we do at this event?
Meeting in person and ...

• hacking together and contributing back to open-source
• show and tell (go on stage and show what you are working on?)
• helping new people to land their first pull request and their first open-source contribution
• learning from each other

## +++ What do you need?

Bring the equipment you need to develop software and contribute to the open-source community like your Notebook/Laptop.
Don't forget it ;)

## +++ I don't know what I should work on :( ...
Don't worry. We will help you to find the right project to contribute to, based on your skills.
Maybe there are other people who want to do pair programming and a group will be built. We make it happen :)

## +++ How to get there
Public transport

• Station "Heinrich-Heine-Allee U": Subway U70, U71, U72, U73, U74, U75, U76, U77, U78, U79, U83

Parking

• We can't offer parking spots. We suggest using public transport.

## +++ Important to know

• Attendance is free
• Language of the event: German and English
• WiFi: Available
• Food and drinks are free and available
• Costs: Free