April 16-17, 2018 | Kraków, Poland

Sister Event - ScalaSphere

About the conference

ReactSphere is a conference focused on Reactive Programming and Reactive System Design.
Let's dive deep into the principles of building responsive distributed systems handling huge amounts of data with near-realtime performance. Microservice Architectures, Actors, Messaging Systems, methods for domain analysis, and more will be covered during lively talks.

Call For Presentations

Important dates

  • call for presentations closes on January 15th, 2018
  • all presenters notified by January 31st, 2018


The conference covers the technologies and real life applications of:
  • Reactive System Design,
  • Microservice Architectures,
  • Actors,
  • Messaging Systems,
  • and more


  • abstracts: should have up to 250 words and mention the target audience (beginner, mid, advanced)
  • speaker bios: subject matter expertise and presentation experience are taken into account during evaluation; impress us!
  • additional details, links: add these separately to make the evaluator’s job easier and increase your chances of being selected :)
  • presentations should all be in English, if that is not yet self-evident :)
  • presentation duration: anything from 15 to 60 minutes will fit just fine in the program
  • for those interested in a commercial twist, please contact us about the sponsorship packages available; attendees like presentations which focus on the technology or a business use case
  • perks: our speakers enjoy unlimited access to conference events and presentations (including the sister Sphere events), plus an exclusive presenters’ dinner. However, if you need more support with your travel expenses etc, please let us know and we can discuss the available options (e.g. sponsorship packages)

See you in Kraków!

Contact us

Contact us


t: +48 660 539 657

Sister event – ScalaSphere
Sister event – DataSphere

We are powered by


Virtus Lab

Code of Conduct

The following Code of Conduct is inspired by that from other prominent conferences such as ScalaDays or Scala eXchange.

ReactSphere is dedicated to providing a harassment-free experience for everyone, regardless of gender, gender identity and expression, sexual orientation, disability, physical appearance, body size, race, nationality, age or religion. We do not tolerate harassment of participants in any form. Please show respect for those around you. This applies to both in-person and online behavior.

All communication should be appropriate for a technical audience,

including people of many different backgrounds. Sexual language, innuendo, and imagery is not appropriate for any conference venue, including talks.

If you are being harassed, notice that someone else is being harassed, or have any other concerns, please contact a member of staff immediately. If an individual engages in harassing behaviour, the ScalaSphere staff may take any action they deem appropriate, including warning the offender or expulsion from the event.
We expect all attendees to follow above rules during our Conferences.