October 18-20, 2017


EXPO XXI, Warsaw, Poland


1000 tickets


About 20 professional speakers

ABOUT THE EVENT / come and learn from the best

.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.
With our vast experience in organizing numerous IT conferences, including events from DeveloperDays series, we are making this event better every year!
In 2016 the conference hosted ca. 900 attendees from 26 countries. They enjoyed 33 technical sessions delivered by 18 speakers – among them some of the best experts of .NET area from all over the world, including Jon Skeet, Ted Neward, Dino Esposito, Alex Mang and Adam Granicz. This edition of .NET DeveloperDays will be even bigger. We are focused on bringing you the best technical content, star speakers and great atmosphere at affordable prices.
For the most recent info about the event, session announcements and special offers, follow this website, our Facebook and Twitter.
For the recordings of sessions from previous edition of the conference, please check our YouTube channel.

Conference Price List / book early for best price

Super early bird

$From: February 1To: March 31

From: February 1
To: March 31
175€ / 700PLN
225€ / 900PLN
Pre-con + Conference
350€ / 1400PLN

Early bird

From: April 1
To: May 31
225€ / 900PLN
275€ / 1100PLN
Pre-con + Conference
450€ / 1800PLN

Normal price

June 1 - September 20

From: June 1
To: September 20
275€ / 1100PLN
325€ / 1300PLN
Pre-con + Conference
550€ / 2200PLN

Last minute

September 21 - October 13

From: September 21
To: October 13
325€ / 1300PLN
375€ / 1500PLN
Pre-con + Conference
650€ / 2600PLN

All prices are net prices. VAT at 23% applies to all registrations.

Available payment methods: Bank transfer / PayPal

What’s included in the price?

2 days full of great technical content delivered by amazing speakers
FREE conference T-shirt
FREE conference backpack, filled with gifts from our sponsors
Tasty food, including full lunch and coffee breaks throughout the day
Conference Party on October 19th (see details)


Event Speakers / meet the gurus of .NET

Michele Leroux Bustamante

Microsoft Regional Director and Microsoft Azure MVP

Neal Ford

Director/Software Architect/Meme Wrangler

Dino Esposito

Microsoft ASP.NET MVP

Jeff Burtoft

Principal Program Manager for Web Apps at Microsoft

Alex Mang

Microsoft Azure MVP

Alon Fliess

Microsoft Regional Director and Visual Studio MVP

Sasha Goldshtein

Microsoft C# MVP

Daniel Marbach

Microsoft Azure MVP

Gill Cleeren

Visual Studio MVP

Eran Stiller

Microsoft Azure MVP

Szymon Kulec

Visual Studio MVP

Dror Helper

Senior Consultant & Architect at CodeValue

Sebastian Solnica

System Engineer at KMD

Maciej Misztal

Senior .NET Developer at 7N

Pre-cons (October 18) / full-day training sessions

Alex Mang
Breaking Apps Apart Intentionally – Visual Studio + Docker + Sprinkles of Azure = Modern Microservices

Containers have been around for quite some time now, but creating, deploying and maintaining them has been a burden before the days of Docker. Literally, Docker has revolutionized not only the way we think about application development but the entire ‘microservices’ pattern altogether.
Read more

See video invitation
Dino Esposito
Programming ASP.NET MVC Core

This workshop provides a comfortable learning path to ASP.NET Core that spans over all the topics a developer must know to use the framework and build Web applications. Although completely new under the covers, ASP.NET Core still looks pretty familiar to many because of the close similarity with the ASP.NET MVC programming model.
Read more

See video invitation
Gill Cleeren
Developing cross-platform apps with C# using Xamarin

Xamarin is quickly gaining a lot of traction within the Microsoft developer community. Using the same language – C# – we can now create apps which run on iOS and Android, next to only Windows Phone previously. Developers which have been developing using the .NET stack now get the ability to extend their reach onto other platforms, while still being able to use tools like Visual Studio.
Read more
Sasha Goldshtein
Production Performance and Troubleshooting of .NET Applications

Modern applications are extremely complex, and with complexity come difficulties in diagnosing performance issues, memory leaks, crashes, and other problems that might manifest only in the production environment. In this workshop, we will review the tools, libraries, and best practices for setting up your production monitoring and diagnostic environment.
Read more

See video invitation

Pre-con Agenda (October 18, 2017) – EXPO XXI, Hall 2

07:30 – 09:00 | Registration, coffee, cakes
09:00 – 13:00 | Workshop session (with coffee brakes)
13:00 – 13:45 | Lunch
13:45 – 17:00 | Workshop session (with coffee brakes)

Conference (October 19-20) - EXPO XXI, Hall 4 / agenda of the conference

Many thanks to our Program Committee for their input and help in shaping the conference agenda!

October 19th 2017 (First day of the main conference)


07:00 – 09:00 Registration, coffee, cakes
09:00 – 09:20 Conference opening
09:20 – 10:20
Opening Keynote:
Michele Leroux Bustamante

Surviving Microservices
10:20 – 10:40 Break
10:40 – 11:40 Dror Helper
5 unit testing facts I wish I know 10 years ago (200)
Jeff Burtoft
Build Web Apps the “Progressive” Way (300)
Gill Cleeren
Building your first real-world Android app using Xamarin in just 60 minutes (300)
11:40 – 12:00 Break
12:00 – 13:00 Daniel Marbach
Async/Await and the Task Parallel Library: await headexplosion (400)
Alex Mang
How Far Can ‘Serverless’ Actually Go? (300)
Eran Stiller
Bot-Tender: A .NET Chatbot Walks into a Bar (200)
13:00 – 14:00 Lunch
14:00 – 15:00 Sponsor session by 7N
Maciej Misztal
Setting up a CI/CD pipeline for a Containerized Project in VSTS (200)
15:00 – 15:20 Break
15:20 – 16:35 Dino Esposito
Adding History to CRUD (400)
Eran Stiller
Building a Complete IoT Massive Multiplayer Game with C# (200)
Sasha Goldshtein
Debugging and Profiling .NET Core Apps on Linux (300)
16:35 – 16:55
16:55 – 17:55 Alon Fliess
Software Architecture That Every Developer Should Know (300)
Michele Leroux Bustamante
Launching patterns for containers – it’s more than just scheduling (200)
Gill Cleeren
Practical Xamarin.Forms (400)
17:55 – 18:15 Break
18:15 – 19:00 Jeff Burtoft
Building for the Future without Abandoning the Past (200)
19:00 – 23:00
19:15 – 20:00
Q&A with speakers
20:30 – 21:30
DevTalk Live


October 20th 2017 (Second day of the main conference)


TIME Hall A Hall B Hall C
08:00 – 09:00 Registration, coffee, cakes
09:00 – 10:00 Szymon Kulec
Performance that pays off (300)
Dino Esposito
Practical Rules of Better Web UX (300)
Daniel Marbach
Microservices with Service Fabric. Easy… or is it? (300)
10:00 – 10:20 Break
10:20 – 11:20 Dino Esposito
I Have a Microservices Architecture and I Didn’t Know (200)
Alon Fliess
Past, Present & Future of C# Debugging (300)
Sasha Goldshtein
The Performance Investigator’s Field Guide (300)
11:20 – 11:40 Break
11:40 – 12:55 Neal Ford
Building Evolutionary Architectures (300)
Dror Helper
Secret unit testing tools no one ever told you about (200)
Gill Cleeren
Creating a real-world Xamarin application architecture using MVVM (400)
12:55 – 14:00 Lunch
14:00 – 15:00 Sponsor session by KMD Poland
Sebastian Solnica
Securing .NET applications in Azure (300)
15:00 – 15:15 Break
15:15 – 16:15 Dror Helper
Unit testing patterns for concurrent code (300)
Sasha Goldshtein
How I Built An Open-Source Debugger (300)
Michele Leroux Bustamante
So many Docker platforms, so little time… (200)
16:15 – 16:30 Break
16:30 – 17:30 Closing Keynote:
Neal Ford

Stories Every Developer Should Know
17:30 – 18:00 Conference closing

Event Sponsors

Strategic Sponsors

Gold Sponsors

Silver Sponsors

Media Partners

Content Partners

Event Venue / EXPO XXI, Warsaw

EXPO XXI is a modern place on the map of Warsaw, professionally prepared to all kind of special events. The popular facility, located on the Prądzyńskiego Street No. 12/14, guests during the year more than 200 different events including exhibitions, conferences, internal events, fashion shows, seminars, banquets, fairs, cultural and sports events and concerts. Annually, EXPO XXI is visited by hundred thousand people.

More informations you can find at official website of the venue.

Full address of the venue:
Pradzynskiego 12-14 Str.

Event FAQ / find your answers

.NET DeveloperDays is a conference dedicated exclusively to application development on the .NET platform. It is designed for:
  • architects,
  • developers,
  • testers
  • project managers
using .NET in their work and to those who want to improve their knowledge and skills in this field.
The official conference language is English. All conference sessions will be presented in English.
Yes, we will have a WiFi available for the conference attendees.

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

.NET DeveloperDays main conference takes place on October 19-20, 2017 (Thursday-Friday), with full-day pre-conference sessions (optional) taking place on Wednesday, October 18th.
.NET DeveloperDays will be held in XXI EXPO in Warsaw, at Prądzyńskiego 12/14. Visit the venue page for more information about the venue.
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.

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 an 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).
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 note 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:
Sure! Any attendee subtitutions are allowed until Friday, October 13th and are free of charge. In fact, you can do it via e-mail. Also, if you are registering a group and don't know individual names just yet, you can tick appropriate checkbox and provide the names at a later date (no later than Friday, September 15th).
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 hosting at a later date.
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.

testimonials / See What People Say About Us

Recent Blog Posts / get news!

New session in agenda !

We would like to inform you about new session which will be presented right before evening after party at October 19th. The session will be conducted by Jeff Burtoft – Principal Program Manager for Web Apps at Microsoft. Session title: “Building for

Normal Prices till 20th September !

Good news for all interested in attending the conference! We change our promotion dates! Register till 20th September and save 100€❗ Join the international programmers’ community!

Choose conference T-shirt !

We would like to offer you possibility to choose the pattern of conference T-shirt. In order to vote, please visit

Event Organizer

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, Mobile DeveloperDays and JOIN! – the database conference.


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

.NET DeveloperDays 2017