KINTOテクノロジーズ の技術ブログ
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Investigating the Cause of a Deadlock in Aurora MySQL 3 series in a Production Environment
2025/02/17
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Introduction Hello! I'm Nakatani ( @tksnakatani ) from the Common Service Development Group, where we plan and develop essential functions across web and mobile app services, including membership and payment platforms. In this article, I'll share a case of an Aurora MySQL deadlock that occurred in a production environment at a payment platform—one of those "close-call incidents" that many of us have likely encountered at least once. The Incident Leading to the Deadlock One da
[Manabi-no-Michi-no-Eki] We Turned Internal Study Session Videos into a Platform and Made Them Viewable All in One Place
2025/02/14
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Introduction Hello! I am Akeda, a member of both the Corporate IT Group and the Technology Public Relations Group, and of the Manabi-no-Michi-no-Eki Team as well. (“Manabi-no-Michi-no-Eki” literally means “roadside station of learning.”) As a corporate engineer, I am usually doing things like on/offboarding related for IT equipment, and improving the processes and work within the groups. In this article, I would like to share the story of how I, a corporate engineer, happened to get invo
Calling Generative AI (Azure OpenAI) with Java
2025/02/13
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This article is the entry for day 9 in the KINTO Technologies Advent Calendar 2024 . Introduction Hello, I'm Kameyama, an application engineer in the Digital Transformation Development Group. In recent years, generative AI has been applied across different fields, and our development team is also working on building systems that makes the most of its capabilities. Furthermore, since Java is widely used within our development team, we believed it would allow us to efficiently build an interfa
【新コミュニティ発足】モバイルUIテストの可能性を広げる「Appium Meetup Tokyo」
2025/02/13
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技術広報Gの中西です。この度新たなコミュニティを立ち上げることになったのでこちらで告知致します。 モバイルアプリの市場は年々拡大し、サービスの差別化には迅速かつ高品質なリリースが求められるようになりました。そんな状況下で注目を集めるのが、Seleniumに近い操作感でiOS/Androidアプリをテストできる Appium です。ただし、OSのバージョン差や環境構築の難し
Pull Request Options on GitHub and Pitfalls
2025/02/12
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This article is the entry for day 13 in the KINTO Technologies Advent Calendar 2024 🎅🎄 Introduction Hello. I am ITOYU, a front-end developer in the New Car Subscription Development Group of the KINTO ONE Development Division. Engineers, are you using GitHub? At KINTO Technologies we do too! We rely on GitHub's Pull Request feature to review and merge code. When merging, you have several options to choose from—did you know that? In this article, I'll explain the differences betwee
KINTOテクノロジーズの開発組織を強くしたい Engineering Office のご紹介
2025/02/12
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KTC の Engineering Office について 2025年1月、KINTOテクノロジーズ（以下 KTC ）では新たに「Engineering Office」を設立しました。 この記事では社内周知も兼ねて Engineering Office の取り組みについて紹介します。 やりたい、やっていること 我々のシンプルな目的は「KINTO テクノロジーズの開発組織としての力を高めること」です。これを中長期で実現していけるよう、新しいケイパ
What are UUIDs and which version should you use?
2025/02/12
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What are UUIDs and which version should you use? Recently, we had to respond to an incident: a service was down because of duplicate keys in its database. My team and I were scratching our heads because these were UUIDs - you know, those supposedly 'unique' identifiers. How could we have duplicates? Turns out the issues were caused by the service trying to add the same event twice, not that the same UUID was generated twice. This incident got me thinking about UUIDs. What they are? How a
Mind-Blown! Tech Blog Is About Writing What Happens
2025/02/10
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Hello, this is HOKA from the Manabi-no-Michi-no-Eki (Learning Roadside Station) team. The Manabi-no-Michi-no-Eki team functioned a bit like a club activity, where we all worked on both our main jobs and this project during office hours. But this fall (September?), we officially joined the Developer Relations Group! For more details, check out this blog ↓↓ https://blog.kinto-technologies.com/posts/2024-12-03-the-next-goal/ Since we joined the Development Relations Group, we figured, why not c
Hello, Android Car App!
2025/02/07
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This article is the entry for day 5 in the KINTO Technologies Advent Calendar 2024 🎅🎄 I'm Onuma, an Android engineer in the Mobile Development Group at KINTO Technologies. I primarily work on developing the My Route , a mobility service app. In this article, I'll guide you through the process of building Android Automotive OS and developing in-vehicle apps, including both Android Automotive and Android Auto applications. Running Android Automotive OS on a Raspberry Pi What is Andro
Continuous Delivery of Kubernetes Applications Using Only GitHub Actions
2025/02/06
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Continuous Delivery of Kubernetes Applications Using Only GitHub Actions Hello. My name is Narazaki, and I work in the Toyota Woven City Payment Solution Development Group. Our team is responsible for developing the payment infrastructure application for Woven by Toyota at Toyota Woven City . We build cross-functional payment solutions, covering everything from the backend to the web front end and mobile applications. The payment backend runs on Kubernetes and is developed using various cloud-na
When We Put Compose on Top of BottomSheetDialogFragment, Anchoring a Button to the Bottom Proved Harder Than Expected
2025/02/04
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This article is part of day 6 of KINTO Technologies Advent Calendar 2024 . 🎅🎄 Introduction Merry Christmas 🔔. I am Romie ( @Romie_ktc ) from Osaka Tech Lab, where I work on Android-side development for the my route app in the Mobile App Development Group. In the my route Android team, we are currently switching the UI implementation from XML over to Jetpack Compose (hereinafter, Compose). However, since we cannot refactor everything all in one go, there will inevitably be situations whe
Rebuild Broker Architecture
2025/02/04
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KINTO ID Platformチームの Xu Huang です。数年前から複数の国にユーザー認証認可システム（略称UserPool）を提供し、Brokerモデルを採用して複数地域のUserpoolを繋ぎ、お互いに認証認可情報を共有できるアーキテクチャを構築して運用していました。昨年からコスト削減活動の一環としてアーキテクチャの設計を見直し、移行を行いましたので、その変更内容について紹介したい
Azure AI FoundryでDeep Seek R1を試す
2025/02/03
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こんにちは！ KINTOテクノロジーズ（以下、KTC）の生成AI活用PJTで生成AIエバンジェリストをしている和田( @cognac_n )です。 Azure AI Foundryを用いてDeepSeek R1を試してみた 1. はじめに 最近、大規模言語モデル（LLM）の進化がめざましく、さまざまな企業が独自のLLMを発表しています。その中でも注目を集めているのが、中国のAI企業DeepSeekが開発した DeepSeek R1 です。 2025年1月30日
The Challenge of Bridging "Future-Focused Research” and “Technologies Needed Today”
2025/02/03
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Introduction Hello, I’m Koji Nishiguchi, Manager of Analysis Group at KTC Data Analysis Division. Exploring how future-focused research and technology development can address real-world challenges is a key driver of innovation. However, a disconnect often arises between researchers and businesses regarding "research aimed at future needs" and "technologies ready for immediate on-site application." This gap makes it difficult for both parties to collaborate effectively. In t
How the SRE Team’s Mission and Vision Were Decided
2025/01/31
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Introduction Hello, I am Osanai, the leader of the SRE Team in the Platform Group at KINTO Technologies (hereinafter, KTC). In this article, I will discuss how we developed the SRE Team’s mission and vision. If you’re only interested in the finalized mission, feel free to skip directly to here . Why Did We Decide on a Mission and Vision? Three key factors influenced our decision to establish a mission and vision this time. 1. A suggestion from a team member The SRE Team was established in Ja