Q. You’re speaking at Voxxed Days Bucharest in March. Tell us a bit about your session.

During this session I will present the process of bytecode interpretation and compilation inside HotSpot JVM. I will try to make an interactive and practical session (with a demo at the end) for the attendees.

Q. Why is the subject matter important?

This subject is useful for developers who would like to understand what happens during runtime execution with the bytecode and how this is optimized to get better performance. They will know better how to write performance tests in their applications and what really matters to speed up the execution.

Q. Who should attend your session?

Software developers with some Java experience, Architects and all other engineers passionate about understanding the things “under the hood”.

Q. What are the key things attendees will take away from your session?

How and when the Java code is optimized, when the HotSpot JVM produces best code in terms of efficiency and how to write performant code.

Q. Aside from speaking at Voxxed Days Bucharest, what else are you excited about for 2016?

To attend other Java/Architecture conferences – why not as a speaker – and to become a certified Architect.

Q. You’re speaking at Voxxed Days Bucharest in March. Tell us a bit about your session.

My session aims to familiarize the audience with the some key database and JDBC concepts that are of paramount importance in high-performance data access platforms. First, I’m going to explain the relation between throughout and response time. Then I’m going to decompose the transaction response time equation into specific segments like: request time, execution time, response time. Each of these segments can be optimized using a JDBC specific feature: batching, fetching, result set trimming. This way, it’s easy to understand what happens under the hood when a database transaction is executed.

Q. Why is the subject matter important?

Systems are getting bigger and bigger these days, making it difficult to maintain decent response times while accommodating more users. By lowering response time, we increase responsiveness (so our customers will be have a better user experience) and allow more transactions to be executed in a given unit of time. This talk is relevant to any system that wants to take advantage of what JDBC and relational database systems have to offer.

Q. Who should attend your session?

Developers, quality assurance engineers, architects and system administrators are good candidates for these topics, because the session blends theoretical and practical advises too.

Q. What are the key things attendees will take away from your session?

My session delivers practical examples, so if you are using Oracle, MySQL, SQL Server or PostgreSQL, you can surely learn something new from this session.

Q. Aside from speaking at Voxxed Days Bucharest, what else are you excited about for 2016?

I’ve been informed that I’d be speaking at jPrime Sofia too, but there might be other conferences where I might participate.

Q. You’re speaking at Voxxed Days Bucharest in March. Tell us a bit about your session.

It’s about our experiences with IoT, using Java and later Scala and Akka on Raspberry Pi’s combined with lots of Lego. Next to that we investigated Akka remote actors as an alternative to REST. Most of the audiences like the live demo as well!

Q. Why is the subject matter important?

IoT is a big and fun market to explore. Next to that nowadays most of us will work with REST/XML to communicate between applications. It doesn’t feel natural that you need quite some other code and libraries to be able to make an external call. With Akka it feels much more natural to call other applications. It’s almost the same as a local call. That makes it also easier to move from a monolithic application to a more microservice oriented architecture.

Q. Who should attend your session?

Everybody interested in Lego (trains, ferris wheel etc), Raspberry Pi’s, IoT, Akka.

Q. What are the key things attendees will take away from your session?

IoT is fun, but it has it’s own challenges and you can learn a lot from it.

Q. Aside from speaking at Voxxed Days Bucharest, what else are you excited about for 2016?

Speaking at at least 7 more conferences, moving to a new home and getting our second child.

Q. You’re speaking at Voxxed Days Bucharest in March. Tell us a bit about your session. Why is the subject matter important?

My talk is all about building and architecting a system with Event Sourcing.
Event Driven architectures aren’t new by any stretch, but Event Sourcing is definitely not as widespread as it should be. Systems that should really be built on a more solid base, are built with CRUD every day. And by the time the architecture starts to show its age and it becomes clear that CRUD wasn’t really a good choice, it’s really too late to do anything about it.
So, my talk is about the balance of putting these things in place early, but not over architecting and optimizing prematurely.

Q. Who should attend your session?

Very simply, anyone that’s built and outgrown a traditional CRUD system – which, if you’ve been working in the enterprise, is most developers. If you’re just starting out with CRUD, definitely take that to its natural limits once or twice before going with anything else. The traditional, simple architecture has its place and its use, and it’s well worth understanding well. Everyone else should know a few other mature and powerful ways to architect a system, to be able to chose the right tool for the job when necessary.

Q. What are the key things attendees will take away from your session?

The main takeaway will definitely be a mindset still in developing the architecture of an application. Ultimately, while the talk is definitely practical and code-focused, it’s the “taking a step back and looking at what we’re trying to build” approach that’s going to stay with you when you’re building your next system.

Q. Aside from speaking at Voxxed Days Bucharest, what else are you excited about for 2016?

2016 is going to be a big year and I’m mostly excited about taking my teaching to the next level through courses, and speaking regularly.