iOSエンジニア（プラットフォームプロダクト） - Merpay

JD in Japanese follows. 英文の後に和文JDをご覧いただけます。

Software Engineer, iOS - Merpay Employment Status: Full-time Work Hours: Full Flextime (no core time) Office: Roppongi For more details, see the section on our Careers site. About Mercari Circulate all forms of value to unleash the potential in all people "What can I do to help society thrive with the finite resources we have?" The Mercari marketplace app was born in 2013 out of this thought by our founder Shintaro Yamada as he traveled the world. We believe that by circulating all forms of value, not just physical things and money, we can create opportunities for anyone to realize their dreams and contribute to society and the people around them. Mercari aims to use technology to connect people all over the world and create a world where anyone can unleash their potential. For more information about Mercari Group’s mission, see Organization/Team Mission Mercari Engineering Principles Mercari Engineering Principles are a shared understanding that serves as the foundation of engineering beliefs and behavior at Mercari. The Engineering Principles are designed to complement the organizational identity (Mercari’s mission, values, and culture) from an engineering viewpoint. These principles ultimately help us achieve Mercari’s mission by defining the ideal state we seek to realize in the long term. Passion For The Product Grow Together Solve Through Mechanisms Collaborate Openly For more details, please see the following link: Team mission and expectations of the role We are looking for a professional iOS engineer to to take ownership from planning through development for Merpay’s new payment and finance services, based on the company’s mission of “building trust for a seamless society.” At Merpay, multiple iOS engineers are assigned to each domain and drive their respective domains forward. In this position, you will leverage deep expertise in iOS app development using Swift, collaborating with product managers, designers, backend engineers, and QA/Test engineers. As part of the Merpay Platform, you will work on developing core product features (such as identity verification, bank integrations, and our internal server-driven UI infrastructure), as well as features to drive growth initiatives. In addition to feature development, you will also focus on improving quality, testing, automation, and stabilizing releases, actively improving the developer experience. In the future, we welcome engineers who are willing to proactively work beyond traditional role boundaries of an iOS app engineer, including working across Android, Web, backend, or even into roles such as product management or QA. We are strongly promoting an AI-native approach. At the same time, we place great importance on ensuring we never compromise correctness, security, privacy, or user trust. Rather than whether AI tools are used, we value the ability to properly validate outputs and take full responsibility for quality in development. You will work in a diverse, global environment with team members from various backgrounds, including English speakers. While perfect English proficiency is not required at this stage, we welcome those who are comfortable working in English . We encourage and value external contributions such as: Speaking at domestic and international conferences such as try!

Swift and iOSDC Writing articles on the Mercari Engineering Blog For more details about Mercari’s mission and values, please refer to the following. See for more information about our mission and values. Work Responsibilities Job Description Design, development, and improvement of new features related to Merpay’s core platform functions (e.g., identity verification, bank integrations, internal server-driven UI infrastructure) * Team-based development in collaboration with product managers, designers, backend engineers, and QA/Test engineers Improving code quality and enhancing the development environment Conducting code reviews for team members Creating prototypes and proofs of concept (POCs) to introduce new iOS-related technologies Tech Stack SwiftUI Combine, Concurrency Protocol Buffers Bazel GitHub Actions Claude Code Cursor Internal AI agents Note: These are the primary technologies currently in use. Experience with all of them is not required at the time of joining. Unique Challenges Delivering one of Japan’s leading smartphone payment apps to users with both high speed and high quality to millions of users Tackling challenges that require advanced development skills, including standard security practices in financial/payment services as well as mobile app–specific security considerations Navigating both iOS platform constraints and business requirements Collaborating in a team with members from diverse backgrounds, including different languages, genders, and nationalities Going beyond feature development to evolve the developer... experience and AI-native development workflows themselves Qualifications Required Experience & Skills Alignment with the mission and values of the Mercari Group and its companies Passion for the financial services domain Experience developing native iOS applications using Swift Knowledge of iOS standard libraries and frameworks Experience in team-based application development in collaboration with product managers, designers, backend engineers, and QA Willingness to go beyond iOS and work across adjacent domains when needed Strong interest in AI-native development, with the ability to validate correctness, maintainability, and safety Preferred Experience & Skills Experience developing and operating native applications with a large user base Deep knowledge of UI development using SwiftUI Experience in Fintech or KYC domains Strong knowledge of writing testable code Experience with development process and release automation Hands-on experience with the Bazel build system Knowledge of performance optimization Contributions to OSS, technical blogging, or speaking at conferences Language Requirements Candidates should meet one of the following: English : Independent (CEFR B2) / Japanese: Basic (CEFR A2) — preferred Japanese: Independent (CEFR B2) / English : Basic (CEFR A2) — preferred For details about CEFR, see . Learn More About Mercari Group Careers site: Mercan: Social media: / (only available in Japanese) (Only available in Japanese) (Only available in Japanese) Recruiting at Mercari At Mercari Group, we value empathizing with and embodying the mission and values ​​of the Group and each company. To promote the creation of an organization that maximizes the total amount of value exhibited by all members, we would like to understand the experience and skills of each candidate as accurately as possible. Recruiting cycle at Mercari Group Application screening Skill assessment: For engineering positions, you will be asked to complete a skill assessment on HackerRank or GitHub. For non-engineering positions, you may be asked to complete an assessment depending on the position. (The timing of the assessment may coincide with the interview process.) Interview: The number of interviews may vary depending on the position. Reference check: We will ask for online references around the timing of the final interview. Offer: Offers will be determined carefully in consideration of the final interview and the reference check. Learn more about our recruiting process . Equal Opportunity Hiring Here at Mercari, we work to realize a world in which no one’s potential is limited by their background and everyone has the opportunity to freely create value. We also firmly believe that a mindset of Inclusion & Diversity is essential for us to achieve our mission. This, of course, extends to our hiring practices as well. Mercari is committed to eliminating discrimination based on age, gender, sexual orientation, race, religion, physical disability, and other such factors so that anyone who shares our mission and values can join us, regardless of their background. For more details, please read our . Please read and acknowledge our prior to submitting your application. Software Engineer, iOS - Merpay 雇用形態：正社員 働き方：フレックスタイム制（コアタイムなし・フレキシブルタイムなし） 勤務地：六本木 詳細はキャリアサイトの よりご確認ください メルカリグループについて あらゆる価値を循環させ、あらゆる人の可能性を広げる 「地球資源が限られているなか、より豊かな社会をつくるために何ができるか」。2013年、創業者の山田進太郎が世界一周の旅で抱いた課題意識から、フリマアプリ「メルカリ」は生まれました。私たちは、物理的なモノやお金に限らずあらゆる価値を循環させることで、誰もがやりたいことを実現し、人や社会に貢献するための選択肢を増やすことができると信じています。

テクノロジーの力で世界中の人々をつなぎ、あらゆる人の可能性が発揮される世界を実現していきます。メルカリグループの目指すべき方針については をご覧ください。

組織・チームのミッション Mercari Engineering Principles Mercari Engineering Principles は、メルカリのエンジニアリング組織における信念や行動の基盤となる共通認識を明文化したもので、メルカリのメンバー全員が共有するMission、Value、Cultureをエンジニアリングの視点から補完するものとなります。これらのPrinciplesは、私たちが長期的に実現しようとする理想的な姿を定義することで、最終的にメルカリのミッションを達成するために活用していきます。

* Passion For The Product Grow Together Solve Through Mechanisms Collaborate Openly 詳細については をご覧ください チームのミッション・求められる役割 「信用を創造して、なめらかな社会を創る」というミッションのもと、メルペイが手掛ける新しい決済・金融サービスを共に企画から開発までしていくプロフェッショナルなiOSエンジニアを募集しています。

メルペイでは領域ごとに複数名のiOSエンジニアが所属してそれぞれの事業を推進します。

このポジションでは、Swift を用いた iOS アプリ開発の深い専門性を軸に、プロダクトマネージャー・デザイナー・バックエンドエンジニア・QA / Test エンジニア と協働しながら、メルペイのPlatformとしてプロダクト機能開発（本人確認、銀行接続、社内Server-Driven UI基盤など）やGrowth 施策のための機能開発を行います。

また機能開発だけではなく、品質改善、テスト、自動化、リリースの安定化など、開発者体験の向上に取り組みます。

将来的にはAndroid/Web/バックエンド、またプロダクトマネージャーやQAなど、iOS App Engineer の役割を超えた越境をしていくことを歓迎します。

私たちは AI-Native を力強く推進しています。一方で、正しさ・セキュリティ・プライバシー・ユーザーの信頼を損なわないことを重視しています。AI ツールの利用有無そのものより、適切に検証し、品質責任を持って開発を進められることを大切にしています。

英語を含む多様なバックグラウンドのメンバーと協働する環境です。現時点で完璧な英語力は必須ではありませんが、英語で仕事を進めることに抵抗がない方を歓迎します。

そのほか、下記のような外部へのアウトプットも推奨されており、それらが評価される環境です。

try!

Swift、iOSDCといった国内外のカンファレンスでの講演 Mercari Engineering Blog上での記事執筆 メルカリのミッション・バリューについての詳細は をご覧ください 業務内容 具体的な業務内容は下記のとおりです。

職務内容 メルペイの基盤機能に関する新機能設計・開発及び改善 本人確認, 銀行接続, 社内Server-Driven UI基盤など プロダクトマネージャやデザイナー、バッ...