We’ll have a look at some Air Travel Industry problems and how we approach them with Computer Science knowledge.

Audience requirements: Attendees are expected to be proficient in C++ and to bring their own development setup (e.g. laptop + IDE). C++ 11, STL (gcc) will be used for the exercise.

We will talk about combinatorial and search problems from real-life tasks within our product and we will propose possible computer science solutions with their pros and cons for one or more problems. We will cover up to 3 problems.

Understanding Kubernetes

So you have some code and it is in a bounded context with a REST API. You are on your way to Microservices. Next you wrap it in a container and now it is an image that others can run. Simple. Now what? No service is an island. Your service needs to log information, needs to scale and load balance between its clones. Your service needs environment and metadata way outside its context. What about where the service will run? Who starts it? What monitors its health? What about antifragility? Updates? Networking? Oh my.

Services live in clusters and clusters live in data centers. Many concepts overlap with the features of cloud management. But don’t get too flustered since, fundamentally, services are managed by clusters. There are several approaches to cluster management such as Docker Swarm, Mesos with Marathon and Kubernetes.

Minikube with Kubernetes is an approachable technique to set up a local cluster that is easy to understand and get started. Whether you have a simple service or a Web application with a set of services, you can develop much of it on Kubernetes with Minikube. We will run some practical examples. Once you understand the mechanics of the tools, we will explore how it works, sort through the terminology and share ideas about practical uses for this technology.

Afterward, you will understand how to run your personal cluster with your Linux, OS X or Windows laptop to further enjoy unraveling the mysteries of running applications in a cluster.

We’ll have a look at some Air Travel Industry problems and how we approach them with Computer Science knowledge.

Audience requirements: Attendees are expected to be proficient in C++ and to bring their own development setup (e.g. laptop + IDE). C++ 11, STL (gcc) will be used for the exercise.

We will talk about combinatorial and search problems from real-life tasks within our product and we will propose possible computer science solutions with their pros and cons for one or more problems. We will cover up to 3 problems.

We’ll have a look at some Air Travel Industry problems and how we approach them with Computer Science knowledge.

Audience requirements: Attendees are expected to be proficient in C++ and to bring their own development setup (e.g. laptop + IDE). C++ 11, STL (gcc) will be used for the exercise.

Originally designed by Facebook to allow its mobile clients to define exactly what data should be send back by an API and therefore avoid unnecessary roundtrips and data usage, GraphQL is a JSON based query language for Web APIs. Since it was open sourced by Facebook in 2015, it has undergone very rapid adoption and many companies have already switch to the GraphQL way of building APIs – see http://graphql.org/users.

However, with some many hundreds of thousands of REST APIs publicly available today (and many thousands others available internally), what are the implications of moving to GraphQL? Is it really worth the effort of replacing REST APIs specially if they’re successful and performing well in production? What are the pros/cons of using GraphQL? What tools / languages can be used for GraphQL? What about API Gateways? What about API design?

With a combination of rich content and hands-on demonstrations, attend this session for a point of view on how address these and many other questions, and most importantly get a better understanding and when/where/why/if GraphQL applies for your organisation or specific use case.

Slides

Habitat is an open source project from Chef Software designed to help you encapsulate exactly what your application needs to run in a single artifact. Build once for Linux, run on any Linux distribution without having to worry about the diverse naming conventions or versions for your dependencies. Build for Windows and deploy as a standalone service. Bring legacy applications forward onto new platforms or into the cloud even if you don’t have access to all of the source code. This talk will focus on the key features of Habitat, including demos of how to build and run an application in the Habitat environment.

Slides

The security team is not just those security professionals who yell at us to not click on links, we are part of the security team. In this talk, we will discuss and demonstrate why security is important by demonstrating some exploits and then talk about how we can integrate some security into our SDLC.

There’s no doubt that today’s developers benefit from imported third-party libraries. Easy to import applications like Google Charts and frameworks like jQuery facilitate quicker software development cycles and more professional results. But while the use of imported third-party libraries is on the rise, there is little awareness that unvalidated, and uncontrolled, third-party include files could also be used as attack vectors for delivering malware. To better understand the potential scope of this problem, this talk shares the results of a survey conducted to gauge the prevalence of websites that import uncontrolled, unvalidated, third-party software. We’ll then look at how these include files could be used to deliver malware, compromise privacy, or deliver ransomware. Finally, we’ll explore ways to mitigate the dangers of importing third-party software libraries.

When most people here the word “metadata” they instinctively think of embedded fragments of information that help describe digital photographs or office documents. But in other people’s hands, metadata provides the context where data exists. And that context can be converted into powerful intelligence that expands and enhances available information. When properly applied, metadata can be used to fill-in the gaps between data to reveal a picture that couldn’t be painted by the original data alone. In this talk, you’ll learn how metadata is created from existing data to solve business problems. The speaker will also share techniques he has used to answer questions about the viability of one of his own businesses. Additionally, you will also learn techniques to keep your organization from leaking information through metadata creation.

While building and deploying microservices (and not only) it is important to know the underlying framework that will be their host. This presentation will be focused on Kubernetes as a container orchestration framework and will target software developers that want to understand better how it works and what features does it provide for your microservices. The main focus will be on creating and deploying a microservice on Kubernetes and then performing a zero-downtime release and rollback.

The demo microservices use JAVA + Spring boot.

The presentation will cover:

• Different ways of using K8S (Amazon, Google, On premise)
• Deploy a simple demo microservice build with Java and Spring boot.
• Using K8S Config Maps for storing configuration of your microservices.
• Achieving Zero downtime deployments with Kubernetes rolling updates feature.
• Taking care for the High Availability of your microservices
• Kubernetes and continuous integration

Rockstar, ninja, guru – you heard it all. There are certain qualities that 10x developers have so we will examine some of them. Join the discussion on what’s common between high performing organizations, transformational leadership and why software engineers play vital role in all this. And yes – 10x developers do exist! Want to take the challenge to prove me wrong?

Slides

Blockchain is the new buzzword in our industry. And not only there.
It expands its reach to many areas of our life and has the potential to revolutionize the way we deliver and use goods and services.
That is why, we ought to catch up by learning what it actually is.
And what better way to learn it than by actually building one live?

On Java2Days, I will walk you through how Blockchain works by building our own version of it in Python.
We will address concepts such as nodes, mining, proof of work, addresses and much more.
So save the date and see you there!

Slides

Self-organizing scrum teams are just not enough! As per the Agile Manifesto “The best architectures, requirements, and designs emerge from self-organizing teams.”, which is true. According the Conway’s law it is also true the opposite, every great team and working smooth is not possible without great architecture.

Microservices and practices like DDD, Event sourcing and CQRS are the answer of enabling the Agility. In REWE Digital we have learned a lot from these practices and we want to share the lessons learned, showing also some real examples, of course everything is Java based. The whole stack is super impressive, we use Spring boot, Apache Kafka and many more.

Slides

While building and deploying microservices (and not only) it is important to know the underlying framework that will be their host. This presentation will be focused on Kubernetes as a container orchestration framework and will target software developers that want to understand better how it works and what features does it provide for your microservices. The main focus will be on creating and deploying a microservice on Kubernetes and then performing a zero-downtime release and rollback.

The demo microservices use JAVA + Spring boot.

The presentation will cover:

• Different ways of using K8S (Amazon, Google, On premise)
• Deploy a simple demo microservice build with Java and Spring boot.
• Using K8S Config Maps for storing configuration of your microservices.
• Achieving Zero downtime deployments with Kubernetes rolling updates feature.
• Taking care for the High Availability of your microservices
• Kubernetes and continuous integration

While building and deploying microservices (and not only) it is important to know the underlying framework that will be their host. This presentation will be focused on Kubernetes as a container orchestration framework and will target software developers that want to understand better how it works and what features does it provide for your microservices. The main focus will be on creating and deploying a microservice on Kubernetes and then performing a zero-downtime release and rollback.

The demo microservices use JAVA + Spring boot.

The presentation will cover:

• Different ways of using K8S (Amazon, Google, On premise)
• Deploy a simple demo microservice build with Java and Spring boot.
• Using K8S Config Maps for storing configuration of your microservices.
• Achieving Zero downtime deployments with Kubernetes rolling updates feature.
• Taking care for the High Availability of your microservices
• Kubernetes and continuous integration

In this talk we will cover all disasters that happened in the Blockchain world. Some of the attacks on the different networks and all the money stolen from different exchanges/websites/Smart Contracts.

Slides

Blockchain is having few problems and scaling is one of them. Currently the transaction throughput of Bitcoin is only 7 transactions per second and this is quite low. One of the current off-chain solutions or so called Layer 2 is the Lightning Network. In this talk we will see why we need the Lightning network and understand how it works with a simple story.

Slides

More and more developers are expected to be on-call, provide out-of-hours support, and respond to production outages. If you don’t have much experience handling incidents, it can be scary, intimidating, and feel like being dropped in the deep end. But it doesn’t have to be that way!

Over the last few years on the FT’s Content team, we’ve transformed our incident response – from a number of mildly terrifying multi-hour outages, to a stable platform where team members feel comfortable on-call.

This talk will provide practical tips and advice on:

• setting up an incident response framework
• what to do when Everything Is On Fire™
• improving things afterwards
• and some horror stories of our own…

Slides

Successful agile software development needs more than SCRUM meetings. The architecture of a system, and the way how we think and talk about it, are make-or-break factors. This talk gives a fast-paced, high level and opinionated view on gearing architecture to support agility.

• The security stack for modern applications
• Using OAuth2 for Authorization – different OAuth2 flows
• Using OpenID Connect for Authentication
• What are JSON Web Tokens (JWT)
• Using IdentityServer 4 as a token service for .NET applications