design - Product Engineering Blog

4 reasons why the TransferWise Hackathon rocks

Hi! I’m Saamuel, one of the 2018 TransferWise Hackathon winners. I’m now working at TransferWise as a Software Engineer in our Tallinn office while studying Information Technology at

design

Where to put application configuration?

What is a good approach to configuration? I will compare drawbacks/benefits of externalizing config vs hardcoding config in code.

spring boot

Building modular apps using Spring

When looking at most of the sample applications and code examples for Spring framework it may seem that everything should be defined as a bean. However, if we want to

design

Illusion of Reuse

I have quite often seen situation where trying to achieve more reuse actually ends up in building the Big Ball of Mud. In some cases it is the Enterprise Domain

tdd

5 Tips for Getting More Out of Your Unit Tests

State of Application Design In vast majority of applications I have seen the domain logic is implemented using a set of Service classes (Transaction Scripts). Majority of these are based

microservices

Why Over-Reusing is Bad

One of the Holy Grails of software development has always been reuse. In the following post I want to focus on reuse of application logic in its different forms. I will not cover reuse on more abstract levels like ideas or patterns. This will

design

Rebuilding software is inevitable

No matter how good the initial design is it will start degrading once it's out there. Software design seems to follow the 2nd law of thermodynamics - in a software system the amount of entropy tends to increase over time. The moment something is

ddd

Software design and readability

Software development is mostly about knowledge building – finding out what customers need, what ideas work and what don’t (Lean Software Development). This knowledge is stored in multiple ways inside an organization. Much of it will be in the heads of the people involved