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Software Development

MySQL Partition Pruning

Recently, we learned an expensive lesson about MySQL partition pruning. There, it is better to share it here so that others will not repeat our mistake. Background In our system, there is a big stats table that does not have primary key and indexes. This table is partitioned, but the lack of indexes often causes the full partition or even ...

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From Macro to Microservices: Jumpstarting Your Transition

In my last article, we went through the reasons why changing from macro to microservices might be a good idea. In this one, we get to the real stuff: How a facade proxy should function to start replacing your old services and/or introducing new ones the easy way, and then how to deploy it to AWS inside a Docker container. ...

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SOLID Is OOP for Dummies

You definitely know the SOLID acronym. It stands for five principles of object-oriented programming that, if followed, are supposed to make your code both legible and extensible. They were introduced almost 30 years ago, but have they really made us better programmers in the time since? Do we really understand OOP better thanks to them? Do we write more “legible ...

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The TDD That Works for Me

Test-driven development (a.k.a. TDD) was rediscovered by Kent Beck and explained in his famous book in 2002. In 2014, David Heinemeier Hansson (the creator of Ruby on Rails) said that TDD is dead and only harms architecture. Robert Martin (the inventor of the SOLID principles) disagreed and explained that TDD may not work only in certain cases.   A few ...

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What craftsmanship means to me

Over a decade ago now I got my first team lead role. It was a reasonably unexpected promotion when the existing team lead left shortly after I joined. This baptism of fire introduced me to line management, but also made me question my career choice. But it was, in hindsight, the beginning of a new journey: of becoming a software ...

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What do you mean… Done?

The Monday status meeting is drawing a close. Doris the development manager was keen to start working through a file of resumes on her desk, Sarah the lead developer knew her pair Jo had started coding without her, Peter the product manager was on a flight to Madrid in a couple of hours, but Pat… Pat the Project Manager was ...

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