Badoo Android Architectural Journey

A talk presented at the Londroid meetup about the architectural journey of Android development at Badoo. The abstract: At Badoo, we have a long history when it comes to Android development. Since the beginning, the product has experienced huge growth, and our codebase and our team have grown with…

Introduction of View Styles at Bumble

We are the team behind Badoo and Bumble, two of the world’s largest dating and connection applications with millions of users worldwide. To deal with the challenges that arise with such different products we rely on code reusability, and by so avoiding reinventing the wheel we keep our apps stable…

Aspiring team lead?

Six tips on how to meet deadlines and develop your team When I became a team lead for the first time, I started going to lots of conferences and reading deep books on team management. I was reading all about what I should be and how I should develop, but it was still not clear to me what exactly I should…

Reaktive — a multiplatform library for reactive Kotlin

Reactive programming is really popular today not least because it has loads of plus points: the absence of what is called ‘callback hell’; a built-in mechanism for processing errors; and a functional programming style that reduces the likelihood of bugs occurring. It makes it much easier to write multi-threaded code…

How we tested iOS 12 Beta

I want to share why it’s important to test betas, how we do it in Badoo and what interesting cases we found during our testing of iOS 12 Beta. Why do we test betas?

Screen navigation in iOS

In this article, we will go through different ways of presenting screens in the iOS app. We will start with most straightforward cases and eventually go through some advanced scenarios. In a nutshell we will be adding more abstraction layers to make our screens decoupled and navigation testable by unit…

Reusability as a pattern: from copy-pasting to components

Bumble is developing several applications (i.e: Badoo and Bumble) and each one of them is a separate product with its own features, management, product and engineering teams. However, we all work together in the same office and solve similar problems. Nevertheless, projects have diverged greatly during development. The codebase was…

How to move large-scale React UI-components codebase to TypeScript

Hi, my name is Ivan Grekov and I am a frontend developer at Bumble — the parent company operating Badoo and Bumble apps Our frontend team’s main responsibilities are to deliver new user interfaces and support existing ones across our different applications, mostly within Badoo and Bumble websites. At a…

Modularising an iOS app

At Bumble — the parent company operating Badoo and Bumble apps — the iOS development team have been involved in creating modules for several years now. A large part of the new code is also being developed outside the apps’ code base. As a result of this work, we now…

Crowdtesting

source: pinterest.co.uk It’s been a while since I first heard about crowdsourced testing platforms. It was a time when I had just started to be interested in QA, and when I was browsing Google one day, I found a forum, where a link to the site uTest.com was posted. After a brief…

Bundling C library in Swift framework

In 2014 Apple introduced Swift, a new language for developing applications across its ecosystem. As well as offering various new possibilities and features, it also created some new challenges for those wanting to use good old C libraries. In this article, I will describe one common use case which you…

Continuous delivery for your Kotlin Multiplatform library

As part of the Bumble family— the parent company operating Badoo and Bumble apps — one of my main projects was involved in the team that created Reaktive library — Reaktive Extensions on pure Kotlin. In the case of Kotlin Multiplatform I discovered that continuous integration and continuous delivery require…

Liveprof will show you how and why the performance of your PHP app changes over time

App performance is one of the key criteria for evaluating developers’ work. Profiler is a tool used for optimising the performance of PHP apps in particular. If you’re seeing an increased response time but you’re not sure which parts of the code are causing it, you can use XHProf to…

Writing Kotlin Parcelize compiler plugin for iOS

This article describes my experience writing a Kotlin compiler plugin. My primary goal was to create a Kotlin compiler plugin for iOS (Kotlin/Native) similar to Android’s kotlin-parcelize. The outcome is the new kotlin-parcelize-darwin plugin. Prologue Even though the main focus of this article is iOS, let’s take a step back and…

Covering A/B tests with UI tests:

How to avoid getting tangled up in your own code Hi there! My name is Vitaliy Kotov and I spend most of my time working on automated testing issues at Badoo. In this article, I tell you all about how we have organised the UI testing work with our numerous A/B tests, the problems we have had to deal with…

How 3 Process Patterns will change the way you do Test Automation

A few years ago, here at Bumble — the parent company that operates Badoo and Bumble apps — we started to shift towards using autotests more in our development, testing and release processes. We have, however, encountered a few challenges along the way. Before we start, you might be curious…

Walk or talk at the best QA conferences in 2018

Do you like meeting new people, sharing your knowledge and keeping up-to-date with the latest technology trends? Then you should definitely check your calendar and add there a few upcoming testing events. I started visiting conferences and meetups a few years ago when I was studying at the university. They…

Part 1: Dynamic Delivery in multi-module projects at Bumble

Dynamic Delivery is a technology which allows you to install and delete parts of an application while the application is working, in order to reduce the space it occupied. If there are functions not being used, what is the point of a user having them on their device? In part…

Fixing serialization of Kotlin objects once and for all

Some time ago, I read an article describing a problem experienced with Kotlin objects and serialization using built-in Java methods. The author suggests an amazing solution involving adding the readResolve method to each object implementing java.io.Serializable rather than using instance checks. Despite this approach seemingly being the most correct one…

How we achieved a 6x reduction of ANRs. Part 2: Fixing ANRs

In the first part, we discussed what ANR is and what are the ways of tracking it. In this article, you will find information on what problems we found in our application, how we fixed them, and the results we achieved. Application Startup The first thing to do if you want to…

Overview of KotlinConf 2019

I’ve been developing with Kotlin for the past two years, and when I was asked if I’d like to attend KotlinConf 2019 with some of my colleagues, my answer was a great, big Y-E-S! Having the chance to attend what is one of the best conferences for mobile devs, I…

Image detection as a service

How we use deep learning and APIs to support our products Across our two apps Badoo and Bumble, we have over millions registered users worldwide uploading millions of photos a day to our platform. These images provide us with a rich data set from which we derive a wealth of insights.

Making custom designable UI components

Hi there! I’m Valera, iOS Padawan at Badoo. Here in our company we are crazy about UI and spend plenty of time designing, polishing and improving the user interface to make our users happy, not only about the services we provide, but also about the look and feel of the…

Swift Package Manager builds iOS frameworks (Updated. Xcode 10.2 Beta)

(Updated. Xcode 10.2 Beta) Swift Package Manager doesn’t work with iOS. That’s probably all you can say about the current state of SPM, but insomnia forced me to expand on the issue and compile the following essay. TL;DR Yes, you can build iOS frameworks with Swift Package Manager; Yes, you can adjust settings via .xcconfig…

Mutation Testing in PHP: quality measurement for code coverage

How do you evaluate how good your tests are? Many people rely on the most popular score, the one everyone knows — code coverage. But this is a quantitative, rather than a qualitative metric. It shows how much of your code is covered by the tests, but not how well…