Web Accessibility And that means...? If you work in web development, you have probably heard of the term "Web accessibility", but do you know what it really is about? When we develop a product we usually try to build something that looks good to the user, something that is easy
ecommerce Content Delivery Flow Whether you are in search for new content management system or optimizing internal processes related to the content - one very useful thing you could do is to design your content delivery tree. The diagram of content delivery gives clear view on many important features that the CMS should support.
hiring Zooplus You returns to Madrid What? Zooplus is searching for talented people to join our Madrid team. We're looking for YOU! Why? It's already been more than 2 years since our last edition in Madrid. Just an eyeblink in which our sales have been increased by ~60% (€1.2 bn), our challenges by 10 and
Automate even more things DRY - Do not repeat what you do Repetitive tasks may consume your time. Worse, they require your focus and force you to think about them, even if they are so easy, even if they seem to be just simple copy-paste. They simply utilize time of your CPU - brain,
design Event driven infrastructure on AWS, Kinesis or SNS+SQS? Recently at work, we were designing our new messaging system to broadcast changes to multiple destinations. The aim is to simplify the communication chain and to reduce coupling between applications. It is quite clear to us that an event driven system is the best fit here. Event driven, it sounds
oop The Law of Demeter - am I the only one who misunderstood it? Have you ever wondered what is your brain good at? Ask any neuroscientist and they’ll tell you it’s really good at thinking as little as possible. It makes perfect sense from the evolutionary point of view - it’s a very energy consuming process. That’s the reason
Generating java model with inheritance from swagger specification Nowadays software requires a lot of integration. Services expose their interface and separate consumers from implementation details. Contract first approach is well known as a best practice since years, and this approach is not restricted to WSDL based web-services. Also JSON based Restful APIs may benefit from specification-first. One of
code quality What do I believe in Below are my guiding principles, that are the basis of what, how and why am I doing with regards to software development. Long term development speed First and foremost I understand my main responsibility as delivering value as fast as possible in the long term. By delivering value I mean
clean code Code quality as a winning factor Software development seems to me like the only discipline where practitioners can get away with producing crap. If you're a doctor and you screw up a surgery or a treatment, in the worst case you will kill your patient, in the best you will not make his/hers situation worse.
serverless Scalability Made Easy with Serverless Architecture Serverless architecture is relatively new, more frequent usage started around 2014. The idea is to abstract the servers and make the execution of the apps easier. It doesn't mean that the servers are gone, it just moves them to another level (platform) and they become part of the platform service.
spring-boot Sequences in Hibernate What are we looking at Why do we even use Hibernate? Well it's convenient and easy to understand! Do we know how Hibernate works? Of course! We use it in production for years! Those are usually the answers from everybody that uses Hibernate. Well in general I agree with the
BDD Writing good tests (part 2) Last time I just barely scratched the topic of writing test scenarios. I briefly gave only a few hints like "avoid unnecessary information", "don't include implementation details" or "don't repeat yourself in different scenarios". This time I'd like to dig deeper and present results
REST API API documentation as code with Swagger, AsciiDoc, Cucumber and Structurizr With the growing love of API at zooplus, more and more our apps & services are provided with a REST API. We love REST API because it's simple and flexible. To keep the simplicity and flexibility, we need to be proactive in providing accurate information about our API to the
Perfect Unit Test This is a perfect unit test. @Test public void Should_Sum_When_ArgumentsAreSmall() { // given Sumator sumator = new Sumator(); // when Integer result = sumator.sum(1, 2); // then assertThat(result).isEqualTo(3); } Take a look. Take a deep look. If all your unit tests look like this, you’re saved. Your career
RWD Visual test driven development (VTDD) for responsive web pages using Galen Responsive Web Design (RWD) makes a web page look good on all devices, but testing responsive web pages is a tedious task. So the challenge that we took up was to implement a strategy for testing responsive web pages with the test first approach. For some time my team was
Writing good tests (part 1) Everyone knows how NOT to write unit tests, either you know the rules and avoid pitfalls, or you don't know the rules and struggle with hard to maintain unit tests. The same rules apply to higher level tests, but there are also other things to consider. We, in the team,
refactor God classes sound nice, but they are the Devil We have different names for it, but every software developer has seen them: one or more classes that seem to know everything and follow absolutely no programming principle. The class has 1000+ lines of code, class fields, static fields, methods with DB calls, static methods, if statements in an if
ExtJS UI or not to UI Initial idea 4 months ago we had a discussion on how to continue with admin UI development. The problems we face is that our admin is mostly written in PHP with old school design talking over hessian with Java backend. So you already see a lot of problems just in
