We’ve all seen those services…well, YUMEMI created them. Here is a behind the scenes look at some of YUMEMI’s development works.

Rakuten Group EC business has two core services: Rakuten Ichiba and Rakuma. Here is a look behind the scenes at Rakuten Group’s Android app development.

Hello! We are from Mobility Technologies Co., Ltd. (MoT). MoT’s goal is to “bring joy to people in their travels” mainly with our taxi app “GO.” Some of you might have used the “GO” app. MoT not only develops the smartphone app that people ordinarily use, but also uses Android to develop the in-vehicle system for taxis as well. Here is an introduction to the two Android app development teams involved in developing “GO.”

Under our "make everyday cooking fun!" mission statement, we at Cookpad provide several services. To deliver better solutions to our users, we use Android in diverse ways, follow advances in the platform, and pursue endeavors to sustainably grow and enhance the productivity of our services. In this article, we share some of our undertakings.

DMM, the company that tries its hand at anything and everything, has developed a variety of services available with our Android apps. Here is a rundown of how Android apps are developed at DMM.

Under our mission of “building a society brimming with teamwork,” we at Cybozu develop software to help support collaboration. Though often associated with web application development, Cybozu has also been working hard on mobile development. This article covers efforts we made for Android app development between 2018 to date—a topic we’ve seldom shared with outside sources—while touching on changes in our development team.

Thank you for clicking on the MedPeer page. I am Kaoru Hotate, a member of the kakari development team at MedPeer. We strive every day to improve the way in which people go to hospital, see a physician, and get medicine at a pharmacy. This article provides a glimpse into how engineers work at MedPeer, while also describing some of the issues that healthcare facilities and pharmacies currently face and some background as to why we need kakari service. I hope that you will find the information throughout this article beneficial.

STORES Payment is our service that enables businesses to easily introduce cashless payments to their stores. This article shares the efforts we make in how we develop our Android app and help business owners with STORES Payment—a payment service that requires a high level of reliability.

In recent years, Android has increasingly been seeing apps built through a combination of multiple modules. This approach is known as a multi-module architecture, and we at coconala have started working to adopt it, too. This article shares our efforts of transitioning from a monolithic to a multi-module configuration.

Wantedly aims to create the infrastructure for modern working professionals. We offer a variety of products surrounding our professional social media platform, “Wantedly”. Here, you will find an introduction to our business, mission, as well as information about the distinctive engineering team that develops and supports our services.

This article shares the characteristics of Android development efforts revolving around Mercari and Merpay.

We at BizReach, Inc. have revamped three Android apps since 2020. Drawing on this experience, we share in this article the thought process behind our architecture selection for the revamp and the growth system for achieving better store ratings. Examples presented here are the BizReach Campus app tailored to university students, which we redesigned in May 2021, and the BizReach job matching app, which, since its makeover, we have been operating for over a year and a half.

In September 2020, JetBrains released the alpha version of Kotlin Multiplatform Mobile (KMM). Hasn’t every app development engineer thought “I would like to use KMM to write a common logic” as least once? This article discusses what led up to our decision to adopt KMM for our project to fully replace “HOT PEPPER GOURMET” and what actually happened when we did adopt it and attempt to implement a shared logic.

In recent years, we at teamLab have often given the impression of being artsy, but digital solutions resolving client requests and issues account for half our business. Our development has spanned a broad range of diverse sectors, including finance, EC, sports, and IoT. We have been providing the means to solve a wide variety of issues straddling different sectors for clients in many different industries. We have implemented various initiatives to solve issues and have been working to create an environment in which our engineers are able to fully commit themselves to solving problems.

After five years from ABEMA’s launch, its namesake app has seen more than 68 million downloads. The streaming service hopes to keep growing as “the new future of TV,” aiming to innovate television broadcasting.

Yappli develops and runs an application platform under the same name, through which users can develop apps with no programming skills required. This article introduces our development process, as readers may have a hard time wrapping their heads around what an app platform is and how we develop a no-code system.

Bitkey Inc. provides various products, including home-grown devices, under a vision to “Connect.” This article shares examples of Bluetooth Low Energy (BLE) device communication on Android.

Hello! We are from RoomClip. In line with our mission of “supporting everyday creativity,” we independently develop and operate in-house “RoomClip,” Japan’s largest housing and lifestyle social platform gathering actual photos showing how people live. For this article, we asked the Android team responsible for development of RoomClip about how they usually pursue developments, the variety of initiatives they have pursued so far, and their future.

Since our founding in 1997, we at mixi have been offering services—including our namesake social networking platform and smartphone apps Monster Strike and FamilyAlbum—designed for people to enjoy communicating with friends, family members, and other loved ones. Twenty services are available at the moment with more unreleased ones in the pipeline, and we’re developing new businesses and games in rapid succession, too. In this article, we share development cases of FamilyAlbum and TIPSTAR as representative examples from our extensive product range to talk about our development framework and engineering culture.

Under its corporate philosophy—“Inspire the world. Deliver joy every day.” —ZOZO aims to be a space of inclusion and inspiration, welcoming everyone who enjoys fashion and supporting a better future. This article describes the Android development structures of and challenges in each ZOZO product.