.NET DeveloperDays 2021

Main Conference: October 19-20, 2021

Pre-cons: October 18, 2021

Post-cons: October 21, 2021

Main Conference venue - EXPO XXI, 12-14 Prądzyńskiego Str., Warsaw

Pre-cons & Post-cons venue - GoldenFloor, Atlas Tower (26th floor) – 123a Jerozolimskie Al., Warsaw

What is .NET DeveloperDays


.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.

Event format

The conference will be held in hybrid mode.
For those who registered for in-person participation – at the venue and to register for online participation – remotely.
Pre-cons and Post-cons will be held only in in-person format.

Important information

Due to the current pandemic situation, we are not sure if the conference will be possible in its usual in-person form. Therefore, depending on the regulations in place at the time of the event, it will take one of the following forms:
– if the in-person events are allowed: as a in-person
– if the in-person events are not allowed: as a fully virtual conference (similar to our 2020 event)
Please refer to our decision tree diagram for details.


See summary video from .NET DeveloperDays 2019