Engineering

Discover the best practices, tools and technologies for software development we used in our products. Empower your coding skills with us.
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What is Docker and How to Use it With Python (Tutorial)
This is an introductory tutorial on Docker containers. By the end of this article, you will know how to use Docker on your local machine. Along with Python, we are going to run Nginx and Redis containers. Those examples assume that you are familiar with the basic concepts of those technologies. There will be lots of shell examples, so go ahead and open the terminal. Table of Contents What is...
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What and How to Test with Jest and Enzyme. Full Instruction on React Components Testing
Testing React components may be challenging for beginners and experienced developers who have already worked with tests. It may be interesting to compare your own approaches with the ones we use in our project. In order to cover the codebase, you have to know which components must be tested and which code exactly in component should be covered. During reading, I’ll cover the next topics: Define the correct order of...
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Unit and Integration Testing of React/Redux Forms
After seeing the amazing feedback and requests that followed my latest article on What and How to Test with Jest and Enzyme, I’d love to share a couple of other test cases. Today, we’ll talk about testing React forms that are connected with Redux, considering both unit and integration testing. Hopefully, you’ll find something useful below. So, what’s on the agenda? Unit vs. Integration Testing Test Preparations: Form Review Testing...
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The Python Celery Cookbook: Small Tool, Big Possibilities
Everyone in the Python community has heard about Celery at least once, and maybe even already worked with it. Basically, it’s a handy tool that helps run postponed or dedicated code in a separate process or even on a separate computer or server. This saves time and effort on many levels. Table of Contents An Introduction to the Celery Python Guide Celery Basics Primary Python Celery Examples Celery For Advanced...
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Configuring Django Settings: Best Practices
This article is intended for engineers who use the Django framework. It gives a deep insight into configuring Django project settings, and the pros and cons of different approaches. In the article, you will also find recommendations concerning tools, best practices and architectural solutions, all time-tested and proven by successful projects. Table of contents: Managing Django Settings: Issues Setting Configuration: Different Approaches settings_local.py Separate Settings File for Each Environment Environment...
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Debugging Python Applications with pdb
Debugging isn’t a new trick – most developers actively use it in their work. Of course, everyone has their own approach to debugging, but I’ve seen too many specialists try to spot bugs using basic things like print instead of actual debugging tools. Or even if they did use a debugging tool, they only used a small set of features and didn’t dig deeper into the wide range of opportunities...
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Django-Classifier or What Have I Done?
From time to time you have to build some properties for an object and usually those are just a bunch of fields for a model. With django-classifier you may do that in another way. It allows you to create models at start, and set the properties needed from the admin panel at any time. Let me show you two demo projects. First one is the “user profile” I’ve built for...
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Getting Started with Mobile Geolocation Testing
This introductory article on geolocation testing is intended for quality assurance (QA) and test engineers working with web applications, and cross-platform (React Native) and native (iOS, Android) mobile applications. It offers step-by-step instructions on how to start geolocation testing on your project, and also describes the pros and cons of several possible approaches. Here you will also learn such key concepts as back-end representation, data generation, data validation, emulation, and...
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Best Python & Django Books And Tutorials For Beginners
Whether you’re planning to expand your programming skills or get a fresh career start as a software developer, learning Python and Django is something you should consider. In this article, I’ve compiled a comprehensive and up-to-date list of the best Django and Python books and online courses that will help you to achieve just that. Don’t try to do them all at once, though. Start from the beginning, and grow...
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How to Create and Deploy a Telegram Bot using Python?
Table of Contents Introduction or Why You Should Try a Bot Nuances of Telegram Bot Development How About to Create Your First Bot? WebHook Coding Part Introduction or Why You Should Try a Bot (you may skip it if you already know what to do with your bot) Bots are everywhere. It seems that only yesterday we did not even know about their existence; now we can barely imagine our...
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How to build your own blockchain for a financial product
Technologies are changing fast; people are not. – Jakob Nielsen Blockchain is a relatively new technology that many deem is used only for buying Bitcoins. They try to implement it in whatever sphere comes to mind, whether it is fashion, education or healthcare. I would say it is okay — too little time has passed to determine which area of human activity can benefit the most from applying this technology....
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How to Develop a Location-based Application Using React Native
How does Uber always know the pickup location? Or how can Tinder find dates within a two-mile radius from you? It’s simple – you allowed them to know your location. Location-based apps use customers’ locations to function and control different features. From pizza delivery and taxi to Find My iPhone and telling the bus schedule, location-based applications have been helping us out with our everyday tasks. Location might be either...