楽天グループ株式会社：1028350 Native Mobile Engineer, iOS/Android – Kobo Japan Technology Department (KJT)

会社名

楽天グループ株式会社

会社概要

未来を信じ、より良い明日を創っていく。
イノベーションを通じて、人々と社会をエンパワーメントする。私たちは、そんな想いを大切に世界の人々に喜びと楽しさを届けます。
楽天は、E コマース、FinTech、デジタルコンテンツ、通信など、70 を超えるサービスを展開し、世界10 億以上のユーザーに利用されています。
これら様々なサービスを、楽天会員を中心としたメンバーシップを軸に有機的に結び付け、他にはない独自の「楽天エコシステム」を形成しています。ダイバーシティ推進は、楽天にとって最優先の企業戦略のひとつです。従業員の出身は70カ国・地域以上。世界中からユニークで多様な文化的背景や視点を持つ優秀な人材が集まり、イノベーションの原動力になっています。社内カフェテリアにはベジタリアン、ハラル対応のメニューを用意。礼拝所（Prayer room）もあります。
また、仕事と育児の両立支援や、障がい者雇用・活躍促進も積極的に推進。社内のLGBT（※1）当事者やアライ（※2）に対して、情報共有やサポート体制の強化も進めています。誰もが自分らしく力を最大限発揮して働ける。それが楽天のダイバーシティです。

70を超えるサービスを提供し、世界30カ国にサービス展開拠点を持ち、従業員の出身国・地域数は100を超え、オープンポジション制度を活用して多様なキャリアを描くことができる点も魅力です。
フレックスタイム制度、事情に応じたリモートワークの活用が可能です。本社には託児所やフィットネスジム、三食無料で利用可能なカフェテリアが併設されるなど、社員を支える環境が整備されています。

ポジション

1028350 Native Mobile Engineer, iOS/Android - Kobo Japan Technology Department (KJT)

仕事内容

Job Description:

Department Overview

At Rakuten Kobo, we are passionate about transforming the way the world reads. Our team develops innovative eReading devices, apps, and services that connect millions of book lovers to stories and knowledge. We foster a collaborative, diverse, and dynamic environment where creativity and technology come together to deliver exceptional experiences for our customers.



Position:

Why We Hire

We are looking for more members to improve/enhance our products.



Position Details

We are seeking a highly motivated and experienced Native Mobile Engineer to join our Kobo Japan Apps Group. You will play a key role in developing and enhancing our iOS and/or Android applications, ensuring a smooth, engaging, and culturally relevant reading experience for our Japanese users. A strong understanding of mobile development best practices, experience with Japanese content rendering, and a passion for delivering exceptional user experiences are essential for this role.



Work Environment
The Kobo Japan apps team offers a collaborative, multicultural work environment focused on innovation, quality, and agile development.

All communication is conducted in English, with open knowledge sharing and support for continuous improvement. Flexible work arrangements, modern tools, and professional growth opportunities are provided.
The team values diversity, mutual respect, and a healthy work-life balance while delivering user-friendly digital reading experiences.

Desired Personality

- Collaborative: Enjoys working in a team, values open communication, and actively shares knowledge with colleagues.

- User-Centric: Passionate about delivering the best reading experience for Japanese users, attentive to local needs and feedback.

- Adaptable: Comfortable with change, eager to learn new technologies, and able to adjust to evolving requirements or priorities.

- Quality-Focused: Pays attention to detail, takes pride in writing clean, maintainable code, and is committed to delivering high-quality, bug-free apps.

- Proactive: Takes initiative to identify and solve problems, suggests improvements, and is not afraid to ask questions or challenge the status quo.

- Culturally Sensitive: Appreciates and respects Japanese culture and working styles, and is open to diverse perspectives.

- Growth-Oriented: Seeks opportunities for personal and professional development, welcomes feedback, and strives for continuous improvement.

- Customer-First Mindset: Thinks from the end-user’s perspective, prioritizes usability and accessibility, and is motivated by customer satisfaction.

求める経験・スキル

Mandatory Qualifications:
- Bachelor's degree in Computer Science or a related field, or equivalent experience.

- 5+ years of experience in native iOS (Swift/Objective-C) and/or Android (Kotlin/Java) mobile application development.

- Strong understanding of mobile development principles, design patterns, and best practices.

- Experience with common mobile architectures (MVVM, MVP, etc.).

- Experience with RESTful APIs and JSON data.

- Experience with version control systems (e.g., Git).

- Experience with automated testing frameworks (e.g., Appium, Espresso, XCUITest).

- Experience with scripting languages for automation (e.g., Python, JavaScript).

- Excellent problem-solving and debugging skills.

- Strong communication and collaboration skills.

- As a mobile engineer in the team, you can focus on only either iOS or Android, but you are expected to support the other platform when needed.



Desired Qualifications:
- Experience with Japanese content rendering, including handling complex Japanese typography, vertical text, and ruby characters (furigana).

- Familiarity with Japanese language and culture.

- Experience with e-commerce or subscription-based applications.

- Experience with CI/CD pipelines.

- Experience with performance monitoring and profiling tools.

- Contributions to open-source projects.

- Experience with Jetpack Compose or SwiftUI.