Niko Heikkilä

Whenever there is a new film from the master of anarchistic cinema, Yorgos Lanthimos, I must remind myself to bring something to support my jaws into the…

One technique of ensuring my work will be remembered is giving back professional pointers on how the client can improve the quality of their product and process…

The goal of every software team is to deliver the solution into their users’ hands sooner than later. In this post, I will explain how to set up a CI/CD…

In the previous chapters, you saw how the heart of our architecture — services, gateways, and domain models — were covered with behavioural IO-free tests…

In the previous chapters, I have demonstrated the power of designing and testing a backend within the frontend, but you can only walk so far. I haven’t touched…

Whether you follow the domain-driven design or not, clean domain modelling is one of the most crucial problems we software engineers must tackle. Why is that…

In the previous post, I designed our service and use case handlers. However, it had one glaring detail I left unexplained: the gateway. What exactly is a…

The essence of software lies in the problems it helps us to solve. Software that doesn’t offer a solution to the problem is only code for the joy of coding…

Long gone in the past are websites that purely displayed static, seldom changing content to visitors. Today, almost all user interfaces are web applications…

In software development, there’s a lot of talk about small vs big batches. However, that talk mostly comes from the Lean methodologies perspective, which, while…

The single most important topic in functional programming is to understand what a function is. Inherently, a function is a way to map the input value of some…

I often ponder my work and where I want to head with it. Thus, it’s only logical to understand what I need to learn to get there. Moreover, the more I think of…

I’m going to admit something: I had trouble understanding test-driven development (TDD) and it took me a long time to get over it. TDD felt mysterious…

I’ve recently participated in discussions related to developer productivity. I think productivity is harmful because it can fool us into thinking high-frequency…

Recently, I had a discussion with my team regarding an always timely question: at what level should I write my automated tests: unit, integration, or end-to-end…

This post was originally published in Futurice blog. Disclaimer: similar to other ways of working, both pair and mob programming are known to elicit heated…

Few rules in designing clean code have been as crucial for me as Kent Beck’s four rules of simple design. To jog your memory, they are as follows: Well-designed…

Developer: “Hey, could you review my PR? I had this fantastic idea about X the other day, so I decided to give it a go. I think it turned out to be pretty good…

There is one thing uniting the people working in tech. Computers. Fresh from the box, many of them are happily unequipped to fulfil our grand visions and…

There are too many places to mention, but I’ll list a few here: GitHub Explore can offer you many suggested packages based on the GitHub repositories you’ve…

Don’t care about reading much, eh? Too bad, but you can also skip the content and head over to my Playwright Kickstarter repository and learn how to use it for…

The promise on DevTernity conference homepage is to turn developers into architects and engineering leaders. A bold mission, which many major players in the…

While dipping our toes with test-driven development for the first time, a significant obstacle is usually finding out how to write our first tests. Happy cases…

In the modern world struck by volatility, uncertainty, complexity, and ambiguity we are still pushed to estimate our work accurately. Some say estimating is…

Lately, I’ve been investing more time in Python projects. However, having worked with Node.js and TypeScript for the better part of the last few years, I…

Recently, on LinkedIn, I shared my unapologetic opinion that you’re not a professional software developer if you don’t care to write automated tests to verify…

Long Time Ago in a Software Company, Far Far Away The product management learns about a speculative need for the Feature that will help the company increase…

In software, legacy code is a code that runs in production. Don’t you love the defeatist attitude of this quote? You might have stumbled upon it on many…

Hey! An earlier revision of this post described how to survive the world of pull request workflows. However, since then, I’ve grown more convinced that…

I recently finished reading Practical Remote Pair Programming by Adrian Bolboacă. In the description, the author promises to teach you the structure…