.NET DeveloperDays 2020 - Save the dates!

EXPO XXI, Warsaw, Poland

Pre-cons: October 19, 2020

Conference: October 20-21, 2020

Post-cons: October 22, 2020


.NET DeveloperDays is the biggest event in Central and Eastern Europe dedicated exclusively to application development on the .NET platform. It is designed for architects, developers, testers and project managers using .NET in their work and to those who want to improve their knowledge and skills in this field. The conference content is 100% English, making it easy for the international audience to attend.











Scott Guthrie

Executive Vice President (Microsoft)

Richard Campbell

Entrepreneur, Advisor, Rabid Podcaster (.NET Rocks)

Jeffrey Snover

Technical Fellow (Microsoft)


Carl Franklin

Senior Executive Vice President (App vNext)

Christophe Nasarre

Staff Software Engineer (Criteo)

Elton Stoneman

Microsoft Azure MVP

Kevin Gosse

Staff Dev Lead (Criteo)

Alex Thissen

Development Technologies Microsoft MVP

Steve Gordon

Development Technologies Microsoft MVP

Kendra Havens

Program Manager (Microsoft)

Jiří Činčura

Development Technologies Microsoft MVP

Adam Furmanek

Software Development Engineer (Amazon)

David Berry

Technical Curriculum Manager - .NET (Pluralsight)

Layla Porter

Development Technologies Microsoft MVP

Marco De Sanctis

Development Technologies Microsoft MVP

Damir Arh

Development Technologies Microsoft MVP

Michael Kaufmann

Microsoft Regional Director & MVP

Radu Vunvulea

Microsoft Azure MVP

Tomasz Pęczek

Software Developer & Architect (Relativity)

Mauro Servienti

Solution Architect (Particular Software)

Dror Helper

Freelance consultant & software architect

Kamil Mrzygłód

Senior Software Developer (Demant Technology Centre)

Martin Ullrich

Development Technologies Microsoft MVP

Thijs Limmen

.NET ALM Consultant (Xpirit)

Johnny Hooyberghs

Software Engineer and Trainer (Involved)

Miroslav Popovic

Technical Lead (Seavus)

Halil İbrahim Kalkan

Software Architect & Developer (Volosoft)

Alexandre Malavasi

Senior Software Developer (Primegov / Propylon)

Sławomir Kwasiborski

Software Solutions Architect (Demant Technology Centre)


We are doing our best to tweak the agenda. We want to make it appropriate to every Participant by building as many tracks as possible.

Legend of the agenda

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Pre-cons are full-day training sessions.
We organize pre-cons conducted as a lecture or as a hands-on workshop.

Number of seats at each pre-con is limited. Register early to avoid disappointment!

Elton Stoneman

Modernizing .NET Monoliths with Docker and Kubernetes (hands-on)

Docker is a platform for running applications in lightweight units of compute called containers. You can run new and old apps in containers, and get increased portability, security and efficiency for your software. The platform supports the full development and deployment lifecycle – with Docker you can build, ship and run any app anywhere. Docker has had production support for containers since Windows Server 2016, and Windows containers don’t need separate licensing.

Migrating your apps to Docker is a great way to increase utilization in your datacenter, or to prepare for a move to the cloud with a managed Kubernetes service. When your app is running in Docker, it’s easy to break features out and run them in separate containers, so you can modernize your architecture and adopt new patterns without a full microservices rewrite. In this workshop you’ll use Docker on Windows Server* and learn:

    • how Docker containers work on Windows
    • how to package existing .NET apps using Docker
    • how to break features out from a monolith into separate containers
      • using event publishing to modularize the back-end of your app
      • using a reverse proxy to modularize the front end of your app
    • how to add monitoring to your containers
    • how to productionize your Docker images so legacy apps behave like new cloud-native apps
    • how to run distributed .NET applications in Docker Swarm and Kubernetes
    • how to run a full CI pipeline using Docker

* – you don’t need your own Windows Server machine, you’ll be provided with a VM in the cloud. You just need a Remote Desktop client so you can connect.

Alex Thissen
Thijs Limmen

Building modern web applications using .NET Core and Angular (hands-on)

The web has evolved. And the pace just keeps increasing. Let us spend one day together and you’ll learn how you can build an end-to-end modern application built with the most common technologies used today for web applications. Things start with a good foundation and so the first step will be an API built with ASP.NET Core. We will cover topics including the architecture of the API built with .NET Core, security, deployment using Docker and more.

We’ll then use the API in a SPA architecture built with the latest version of Angular. Here you’ll also learn best practices to approach this, the architecture for this type of applications… At the end of the day, you’ll walk away with a good understanding of how you can set up modern web applications in your organization.

Workshop participant will need the following:

  • Visual Studio 2019 with latest updates
  • .NET Core 3 SDK (not yet available in final format)
  • Visual Studio Code
  • Angular CLI

Christophe Nasarre
Kevin Gosse

Effective Debugging in .NET (hands-on)

Studies show that 35 to 50% of the programming time is spent on debugging. Yet, this is a skill that many developers tend to neglect. In this workshop, we’ll present you with a various range of debugging problems and guide you on the methodology to solve them. From the little-known features of Visual Studio to the powerful capabilities of WinDbg, we’ll explore a wide variety of tools and help you pick the right one for the right situations.


  • Common debugging scenarios with Visual Studio. Tips and tricks. Little known features.
  • Performance investigations with Visual Studio and PerfView
  • Post-mortem debugging with Visual Studio and WinDbg
  • Automating live application/memory dump processing with ClrMD


  • Visual Studio 2017
  • WinDbg
  • Perfview


08:00 – 09:00 | Registration, coffee, cakes
09:00 – 13:00 | Workshop session (with coffee breaks)
13:00 – 13:45 | Lunch
13:45 – 17:00 | Workshop session (with coffee breaks)


EXPO XXI, Warsaw

EXPO XXI is a modern place on the map of Warsaw,
professionally prepared to all kind of special events.
Annually, EXPO XXI is visited by hundred thousand people.


  • Super Early Bird
    799 PLN / 199 EUR

    999 PLN / 249 EUR

    1599 PLN / 399 EUR

    Starts: December 1, 2018
    Ends: February 28, 2019

  • Unavailable
  • Early Bird
    1099 PLN / 274 EUR

    1099 PLN / 274 EUR

    1899 PLN / 474 EUR

    Starts: March 1, 2019
    Ends: May 31, 2019

  • Unavailable
  • Normal Price
    1399 PLN / 349 EUR

    1199 PLN / 299 EUR

    2199 PLN / 549 EUR

    Starts: June 1, 2019
    Ends: August 31, 2019

  • Unavailable
  • Last Minute
    1799 PLN / 449 EUR

    1399 PLN / 349 EUR

    2799 PLN / 699 EUR

    Starts: September 1, 2019
    Ends: October 18, 2019

  • Unavailable

All prices are net prices. VAT at 23% applies to all registrations. Available payment methods: Bank transfer / PayPal.
Payment by PayPal incurs a 3% surcharge added to your registration price.

What’s included in the price?

2 days full of great technical content delivered by amazing speakers
Conference goodie bag
FREE conference T-shirt
FREE conference after-party
Tasty food, including full lunch and coffee breaks throughout the day
Full access to conference materials (videos and presentations)





Fast Reports
KMD Poland





We will host about 2000 attendees at .NET DeveloperDays.

If you would like to speak to them, get to know them a little better and present your company to a wider audience, take a chance and become a .NET DeveloperDays Partner!

We have three standard sponsorship packages but we are also ready to offer you more bespoke packages. The number of available packages is limited, so please book early!

Please fill in the following form and we’ll contact you immediately.

We would like to inform you that the controller processing personal data of the participants of trainings and conferences is the company Data Master sp. z o.o. (hereinafter referred to as: the Company) with a registered office in Wrocław (53-333) at ul. Powstańców Śląskich 2-4, REGON: 022121927, NIP: 8971789230, KRS: 0000458822.

Purpose of processing

The Company processes personal data in order to enable contact with the Company.

Legal basis for personal data processing

The company processes personal data, on the basis of received consent, pursuant to Art. 6 section 1 letter a of the General Data Protection Regulation.

Please be advised that if the processing of personal data is based on the consent, you can at any time withdraw consent to all processing to which consent was expressed, or for specific purposes of processing. We would also like to inform you that the withdrawal of consent will not affect the lawfulness of the processing of participant’s personal data, which was carried out on the basis of consent prior to its withdrawal.

Period of data retention

The retention period of personal data is strictly related to the purpose of processing and can reach up to 10 years after the end of the conference or training.

Obligation to provide the personal data

The data is provided on a voluntary basis. However, if a participant does not provide us with such information, it will not be possible for such a participant to take part in the training or conference.

Rights of data subjects

You have the right to request access to your personal data. In many cases, you also have the right to demand for your personal data to be corrected, deleted, the processing to be restricted and the data to be transferred.

We would also like to inform you that you have the right to lodge a complaint with the national supervisory authority.


If you need to exercise your rights, please contact us by e-mail: info@data-master.pl

It is also possible to contact us via the contact form available on the website: http://data-master.pl/kontakt/

Frequently Asked Questions

What is this conference about?
The conference is about software development using .NET Framework. At the conference, you will hear about programming languages, technologies, tools and practical problems that every person working with .NET can encounter.
Topics of sessions include C#, F#, Visual Studio, ASP.NET, Xamarin, architecture, project management and related. Full agenda will be available soon.

.NET DeveloperDays main conference takes place on October 24-25, 2019 (Thursday – Friday), with full-day pre-conference sessions (optional) taking place on Wednesday, October 23th.


.NET DeveloperDays will be held in XXI EXPO in Warsaw, at Prądzyńskiego 12/14. Visit the venue page for more information about the venue.

I haven’t received a verification email. What should I do?

Please check Spam folder, next verify anti-spam settings of your inbox. If you didn’t find an email, try new registration using another e-mail address.

My company is VAT registered in EU. Do I have to pay VAT on my registration?

Since the place of service delivery is in Poland, we have to charge VAT on top of the net amount and the “reverse charge” scheme does not apply in this case (it’s different from export of services or goods to another EU country). You can, however, reclaim the paid VAT from Polish tax authorities under EU VAT return scheme. More on that here: http://europa.eu/youreurope/business/vat-customs/refund/index_en.htm.

I haven’t received any confirmation that I’m registered for the conference. Can I arrive to Warsaw without any fear?

The electronic ticket, that you problably received on your e-mail inbox, is the confirmation of participation in the event. If you lost it, don’t panic – we’ll send tickets to all Attendees the few days before the event. Even if you were absent at the list of attendees, you would take part in the event after quick payment at the service desk.

Can I pay by credit card?

You can pay by credit card via PayPal. During registration please choose PayPal as your payment method and send your payment via PayPal to the e-mail address indicated on your proforma invoice.

In what language will the sessions be presented?

The official conference language is English. All conference sessions will be presented in English

I need a visa to enter Poland. Can you help?

Sure! As soon as you register and pay for your participation in the conference, contact us and we will prepare a visa invitation letter for you. After registration and payment, please contact us for your visa invitation letter. We will need your full name, date of birth, nationality and passport number. In the unlikely case that your visa application is refused, we will refund your conference fee in full (requires a consulate statement denying visa).

How do I get there?

Warsaw is very well connected, both within Poland as well as internationally. Warsaw has two major airports: Okęcie Airport which serves traditional airlines flying to a huge number of destinations within Europe, and Modlin Airport (located 35km from the city center) which serves low-cost airlines flying to destinations in Western Europe.

Should I enroll for particular sessions?

No, conference sessions don’t demand additional enrollment. However, if you are registered for one of full-day training sessions on October 23, you are assigned to this session. Change of full-day training session that you are registered for is possible not later than 14 days before the event, using a user panel of registration system.

I can’t go to the event, but there’s a person who would like to attend the event instead of me. What should we do?
Please log in to your account in registration system and click the “Edit registration” button. Make all necessary changes, next click “Save” and confirm. Both you and new Partcipant will receive the e-mail confirmation. Prepare the following information:
– first name, last name (of new Participant)
– email address
Tshirt size
– participation in conference party (no/alone/with accompanying person)
– current job position
– job experience
When will my company receive a paper invoice?

According to point IV.4 of the Regulations available at registration system, we don’t send paper invoices. According to Polish law, unsigned invoice has the same importance as signed – thus, in order to get paper invoice, it’s enough to print the electronic version of it.

Can I park my car at the venue?

Yes, there is a paid parking lot at the venue.

Will the registration be open after the keynote starts?

Yes – registration will be open almost all day – till 5 p.m.

Is there a place where I can leave my luggage during the conference?

The venue has a cloakroom available all day.

Will there be a live streaming of the event?

No, we will not be streaming the event live. However, most of the sessions will be recorded and published on one of video hosting platforms at a later date.

Will there be WiFi available?

Yes, we will have a WiFi available for the conference attendees.



Find out more about our other conferences


DATA MASTER is a company with many years of experience in organizing the conferences for the IT industry in Poland, including the DeveloperDays series: .NET DeveloperDays, Cloud DeveloperDays and JOIN! – the database conference.




ul. Powstańców Śląskich 2-4
53-333 Wrocław, Poland
VAT Number: 8971789230

Contact us

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