Digging into Allegro, or how I started my testing career

Maybe it’s another “How I’ve changed my worklife” story, but I hope it is an interesting one. It seems quite important to tell: before the beginning of my Allegro adventure, I was working as… an archaeologist. It was both physical work on excavations and research work at my PhD studies. And the only thing that connects my past work and the current one is: attention to detail.

Finite-state machines made easy

Coordinating complex processes, both business and technical, can be a challenging issue in a distributed system. Especially when the complications associated with them, such as concurrency, idempotency, scalability and hindered testability, come into play — possibly all at once. This is definitely something that can keep many programmers awake at night.

My first days at Allegro

So you’re new to Allegro, have just finished your tech onboarding and are stunned with information overflow? Or perhaps you are planning to join Allegro and don’t know what it looks like in here? I am about to try and describe how I felt just a few months ago and what startled or dismayed me. I hope this short article will answer all your concerns.

Implement stateless authentication like a pro using OAuth: A 100% correct approach

Many of us spend most of their software development careers improving and extending applications protected by pre-existing security mechanisms. That’s why we rarely address problems related directly to authentication and authorization unless we build apps from scratch. Regardless of your experience I still hope you will find this article interesting. It’s not meant to be a tutorial. I would like to focus on clarifying basic concepts and highlighting common misconceptions.

Impact of data model on MongoDB database size

So I was tuning one of our services in order to speed up some MongoDB queries. Incidentally, my attention was caught by the size of one of the collections that contains archived objects and therefore is rarely used. Unfortunately I wasn’t able to reduce the size of the documents stored there, but I started to wonder: is it possible to store the same data in a more compact way? Mongo stores JSON that allows many different ways of expressing similar data, so there seems to be room for improvements.

Speeding up warm builds in Xcode

Programmers who have ever developed software for Apple platforms in the early days of Swift language might remember ridiculous times it took to compile the whole project. For large and complicated codebase times used to range from 10 up to 40 minutes. Over the years our toolset has improved alongside with compilation times, but slow build times of source code can still be a nightmare.

At Allegro, we build and maintain some of the most distributed and scalable applications in Central Europe. This poses many challenges, starting with architecture and design, through the choice of technologies, code quality and performance tuning, and ending with deployment and devops. In this blog, our engineers share their experiences and write about some of the interesting things taking place at the company.