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PostgreSQL Usergroup NL Meetup december 1st 2021!

Building the CoronaCheck app with PostgreSQL

It has been a long time so we are excited to finally be able to invite you all to a new "PostgreSQL User Group NL" meetup on December 1st 2021!

Due to the developments in the Corona restrictions, we have decided to move the Meetup to an ONLINE event.

Starting at 17.00 hrs, Ivo Jansch and Rob Sijmons will take the stage for a live presentation in which they will share their story on a their project: Building the ‘CoronaCheck app’.

Starting in December 2020, the “Ministerie of Volksgezondheid, Welzijn en Sport (VWS) commissioned a team of IT professionals to build, under enormous time pressure, an all ‘open source based’ application using the PostgreSQL DBMS for the registration of the vaccine status of all Dutch Citizens.

Ivo and Rob have been part of this team from the start of the project. Ivo will take us through the development of the app. The app needed to be able to deal with high workloads and (due to it’s expected controversial nature) be build with the highest standards of transparency and security in order to withstand public scrutiny. Rob will take us into the challenges of building the decentral PosgreSQL database environment supporting the app.

Building the ‘Corona Check App’ based on three guiding principles:

  • Transparancy
  • Open source first
  • ‘no back doors’


Postgres Build 2021 Big Screen Experience

However, starting from 13.00 hrs o’clock you are already welcome in the Double Tree Hilton in Amsterdam to watch and experience together the online presentations of Postgres Build 2021 on a big screen. For the program of Postgres Build 2021 please check:

You can register and attend to Postgres Build 2021 yourself. The online meetup will start at 17.00.

We are very grateful to EDB for making the meetup possible. Look forward meeting you all on December 1st in Amsterdam

Gerard Zuidweg (OptimaData)
Feike Steenbergen (TimescaleDB)


13.00 - 16.30 The digital Postgres Build 2021 "big screen" Experience (Optional)

16.30 - 17.00 Doors open for Meetup

17.00 - 17.05 Welcome by Gerard

17.05 - 18.00: BUILDING THE CORONA CHECK APP by Ivo and Rob

PostgreSQL Usergroup NL

The aim of these meetups is to offer visitors the opportunity to increase their PostgreSQL knowledge by organizing meetings. This is done in the form of presentations and discussions about recent PostgreSQL topics. During these meetings important topics will be discussed to inform visitors about the successful use of PostgreSQL. In addition, these meetings offer the opportunity to meet and discuss with other PostgreSQL users and experts present. The presentations are held in English and a snack and a drink is provided.

Singup / Attending

You can signup to attend this meetup in the meetup-group "PostgreSQL Usergroup NL" at You don't have an account on Meetup yet? register for free at and signup for this meetup! Here you will find the details about and how to go to the online meetup!

Link to signup: 

Need any help to signup or you have any questions? Don't hesistate to give us a call.


Location PostgreSQL Usergroup NL Meetup december 1st 2021

This meetup will be held at DoubleTree by Hilton, Amsterdam Centraal. We are in the Manchester Rooms 1 and 2.

Due to the developments in the Corona restrictions, we have decided to move the Meetup to an ONLINE event.

Link to the online event you find here:

We are very happy and grateful for the generosity of EDB to have this Meetup take place.

Details Meetup December 1st

DoubleTree Hotel by Hilton Amsterdam


13.00 - 16.30 Postgres Build 2021 "big screen Experience"
16.30 - 17.00 Doors open for Meetup
17.00 - 17.05 Opening by host Gerard (OptimaData)
17.05 - 18.00 Building the CoronaCheck app by Ivo and Rob
18.00 Networking and refreshments


Social Media #pgNL21

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