Blog

In this post, we will show how Postgres handles timestamps with time zones, and why we need an extra column to store the original time zone information, if we do not want to loose it.

In this post, we will show you how you can implement your own custom validation annotations for Spring Boot and how to assign the error messages to the right fields. As an example we will implement a valid password check and a password confirmation validation.

In this article, we will take a look at how to make GraphQL schema files more manageable by splitting the GraphQL schema definition into multiple files.

This article is an introduction to progressive web apps (PWA). It demonstrates why they are awesome, but also what the drawbacks are.

This article is an introduction to our AsyncView component, used to manage loading and error states of an API call.

This guide will show you what is the best implementation for responsive images according to your needs. We will show how to improve performances when loading images, and how to manage different images in the same element for different screen sizes.

A tutorial about how to mock the security context of an AWS Cognito user in Spring Boot integration tests. This guide shows you how you can annotate an integration test and simulate a test case with a logged in user.

A tutorial about how to extract user groups configured in AWS Cognito in a Spring Boot application and make them available for role based Spring Security annotations.

This tutorial demonstrates how to automatically increment the package.json version number before releasing an application using GitHub actions. In addition, it shows how to pass the version number to your code and display it to the user, so that it can later be used for debugging and bug reports.

A strategy for estimating projects, that should reduce the risk of mixing up the estimation process with the final decision of the price for an offer. In addition, this strategy forces you to think about unexpected and unplanned things.

A tutorial about how to create and deploy a custom event listener for Keycloak. This guide is an example implmentation of a listener that sends notifies an admin via email on every new sign up.

For the SFSCon we prepared two talks about Elasticsearch. Alex exlpains how Elasticsearch can help you solve common problems when you build a full text search. Martin talks about how you should write to Elasticsearch to keep the search speed under control.