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Offline day

Tiny cosy offline

 10:0023:00 (UTC+3)

Park Inn by Radisson Pulkovskaya: Pobedy Square 1, Saint-Petersburg, Russian Federation

Covid-19 free zone

Why It’s Worth Going

  • Talk in person

    To see old friends. To discuss current problems. To come up with new ideas. To debate and just chat.

  • Feel the atmosphere of the offline

    To have a change of scenery, to distract and have a good time. To gain fresh impressions and new acquaintances.
    *And for some, to visit Petersburg in the summer.


  • The time in the program is for the time zone UTC+3.

  • Room 1


    Two Years in the Life of a Kotlin Deep Learning Library: From Prototype to Release 4

    Language -RU

    Alexey will tell how in the dungeons of JetBrains the Kotlin-based deep learning library - KotlinDL - was forged. This talk is not about Deep Learning, as such, but about the uneasy path of growing JVM library for Data Science ecosystem from scratch and about overcoming difficulties with C++ and Python ecosystems. 

    This is not a tutorial or an advertisement for the framework, but rather a chronicle of an experiment that got out of its creator's control. In every sense.

  • Room 3

    Partner’s talk

    How do we do online conferences?

    Language -RU

    We'll take a look behind the scenes and tell you how the JRG team makes conferences happen. You will learn how a speaker's request is turned into a conference report. What data are collected in the player and how the statistics are built. What systems are involved in conference production and on what technologies.

  • Room 1


    What's in my POM for you?

    Language -RU

    In the talk we will review and analyze the non-obvious points in the capabilities provided by Maven in terms of: defining dependencies, configuring plugins and working with the assembly lifecycle.

    Consider the typical problems you might encounter and how to solve them. Consider the nuances of working in a closed corporate environment, and talk about developing your own plugins and archetypes to support the development process; when you might need it and where to start.

    We will talk about a tool that we use every day and know not too well to say with confidence what and how you can do with it.

  • Lunch break

    Buffet and beverages of your choosing.

  • Main studio

    JPoint Anthology: A Conversation with Ivan Ponomarev

    Language -RU

    Разговор в главной студии с теми, кто не только помнит JPoint образца «офлайн» и «до пандемии», но и выступал на нем с докладом. Чаще всего не с одним. Вспоминаем, обсуждаем темы, которые были актуальны тогда, соотносим с тем, что происходит сейчас.

  • Room 1


    Thread Wars: Loom Strikes Back

    Language -RU

    With the Loom project approaching release, the only things the Java world is talking about are coroutines and lightweight multithreading! In this talk, let's realize the place of our coroutines in the world, and to do so, let's understand the history of the issue and how virtual threads from the Loom project work in detail. 

  • Room 3

    Partner’s talk

    Reactive: understand and accept

    Language -RU

    Reactive is cool! Tatiana will talk about the middle layer of mobile, where there are 300 microservices and one third of them are on Project Reactor. At the techtalk she will break down the basics of Reactive and show how the pros of the library can outweigh the cons. She'll also talk about overhead and "illogical" behavior in reactive programming. And we'll break down the tests so we avoid screwing around in the prod.

  • Main studio

    The JPoint Anthology: A Conversation with Nikita Lipsky

    Language -RU

    A conversation in the main studio with those who not only remember JPoint from "offline" and "before the pandemic," but also spoke at it. More often than not, more than one. We recall, discuss topics that were relevant then, relate them to what's happening now.

  • Room 1


    Mocks vs Testcontainers

    Language -RU

    Do we even need mocks when we have Testcontainers? If a mock doesn't work the same way as a "real" system, what is its use? Can flakiness be avoided in integration tests? Is it true that Testcontainers will solve all integration test problems and is it time to write off the H2 database?

    A talk for developers creating integration tests for programs working with databases, caches, streaming and batch systems.


  • Networking

    To see old friends. To discuss current problems. To come up with new ideas. To debate and just chat.

  • Discussion zones

    For chatting with speakers between the talks. No recording, no censorship, no time limitations.
  • BoF

    Discussions without hosts and speakers. So-called behind the scenes, where new ideas appear.
  • Round tables

    Place where speakers and experts discuss industry’s burning questions in public.


There will be a broadcast on the offline day of the conference, which is available to participants with an online ticket. If you want to ask the speaker questions in person and get answers, you are welcome to do so at the venue.

If you don’t have an online ticket, if you purchase an offline ticket, you will have access to the 43 talks and other activities from the online part.

  • Coffee and lunch breaks

    Buffet and beverages of your choosing.
    If you have food restrictions, write to our support team. We’ll find a solution.
  • Night

    Networking for all participants, speakers, and experts.
    Informal atmosphere and heart-to-heart talks.
  • If you already have a ticket for online part of the conference, you may upgrade it up to Online+Offline. Write to our support team:
  • We may also provide you with the discount for upgrading, if you filled in the feedback form on online part of the conference — the link to the feedback form will be sent to your email after the online part of the conference is over. When you will ask for upgrading, just let us know in a letter, that you filled in the feedback form, and the discount is yours.
  • Note! If your ticket was paid by the company, you may ask it to pay for upgrading as well. If they won’t agree, you may pay for it by yourself with the discount.


There will be a COVID-free zone at our conference. Here we gathered all the questions about attending offline day.

  • How to get to the conference?

    At the entrance, show your passport (or its photo on your smartphone) and a valid QR-code. Our employee will scan the QR-code and verify the data with your passport.

    Please note:

    • If the QR code is invalid, you will be denied attendance at the conference.
    • If you have a European vaccination document, it should clearly state the expiration date of the QR code.
    • If the data doesn’t match due to a name or passport change, you’ll need to show proof of the change.
  • What if I don’t have a QR code?
    At the entrance, you can also present a valid negative result of a PCR test taken no earlier than 48 hours before your registration for the event.
  • What if I don’t have a QR code or PCR result?
    A QR code or PCR test is required for admission to the conference. We can give you an express test at the entrance, but please note that the number of tests will be limited. So try to take care of everything in advance.
  • What if I’ve already bought a ticket? Will the money be refunded?
    No, but you can connect to the broadcast and watch the reports online.
  • What security measures will be in place at the venue?
    • There will be sanitizers and disposable masks all over the venue.
    • We will be able to take the temperature and arrange for medical assistance if needed.
  • Will there be mandatory masking at the conference?
    No. But you can take free masks at the registration desk if you wish.


  • Where will the offline day of the conference be held?
    Offline-day will be held on June 24 at the following address: Park Inn by Radisson Pulkovskaya: Pobedy Square 1, Saint-Petersburg, Russian Federation.
  • When will the program and time for the offline day of the conference be known?
    We will publish the program on the conference website starting in the second half of April.
  • What activities will be included on the offline day of the conference?

    The offline conference will include:

    • Talks of the main program
    • Roundtables on current topics
    • BoF-sessions
    • Discussions with offline and online speakers who will come to the venue
  • Will there be an online broadcast of the offline day of the conference?

    We will broadcast live most of the activities of the offline day: talks, roundtables, etc.

    Discussions will not be broadcast or recorded.

  • Offline was so long ago that I no longer remember what the procedure was for offline conferences.
    Don’t worry, before the conference we will send you a participant’s memo. It will contain all the necessary information.
  • What is included in the Online+Offline ticket?
    The Online+Offline ticket includes access to all conference broadcasts, unlimited access to video recordings of the activities, and in-person attendance at the Offline Day.
  • Can I buy a ticket only for the offline day of the conference?
    To attend the offline day, there are two options: buy an Online+Offline ticket or buy a Video+Offline ticket after the conference.
  • How do I get to the offline day if I have an Online ticket?
    If you already have a ticket for the online part of the conference, you can upgrade it to "Online+Offline". To do so, email our support team at
  • How do I get to the offline day if the company only paid for my Online ticket?
    If the company that paid for your ticket is not willing to upgrade to Offline, you can do it yourself at a discount. The discount is given for taking the survey after the online part of the conference ends.
  • Is there a limit to the number of tickets for the offline day?

    The number of tickets is limited to the capacity of the conference venue.

    So it is better to buy tickets in advance while they are available.

  • Are there any restrictions on going to an offline conference?

    You need a valid QR code or a negative PCR test:

    • If you have a European vaccination document, it should clearly state the expiration date of the QR code.
    • The negative PCR test must have been done no earlier than 48 hours before registration.

    If neither is available, we will make you a rapid test right by the entrance.
    NB: The number of tests is limited.

  • And if restrictions are tightened again, what will happen to the conference?
    Unfortunately, the offline conference will have to be canceled. In this case, we will promptly make a refund.