{"id":16211,"url":"https://alion.io/job/mercari-software-engineer-qa-merpay","title":"Senior Software Engineer, QA - Merpay","company":{"id":914,"name":"Mercari","domain":"mercari.com","url":"https://alion.io/company/mercari","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workable","truth_index":{"grade":"A","score":85,"open_postings":112,"ghost_share":0.17,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":83,"computed_at":"2026-10-17T05:46:00Z"}},"role":"QA","role_family":"QA","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Minato, Japan"],"countries":["JP"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":29000,"max_usd":81000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":1081},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"BigQuery","optional":false},{"name":"ChatGPT","optional":false},{"name":"Claude Code","optional":false},{"name":"Confluence","optional":false},{"name":"Cursor","optional":false},{"name":"Datadog","optional":false},{"name":"Gemini","optional":false},{"name":"GitHub","optional":false},{"name":"Google BigQuery","optional":false},{"name":"Jira","optional":false},{"name":"Looker","optional":false},{"name":"Notion","optional":false},{"name":"Playwright","optional":false},{"name":"Postman","optional":false},{"name":"Slack","optional":false},{"name":"TestRail","optional":false},{"name":"XCUITest","optional":false},{"name":"Machine Learning","optional":true}],"status":"live","first_seen_at":"2026-05-22T00:00:00Z","employer_posted_date":"2026-05-22","last_verified_at":"2026-10-18T07:13:40Z","board_verified":true,"closed_at":null,"days_open":149,"trust":{"level":"ok","repost_count":1,"flags":["company_stale"],"days_open":149},"description":"JD in English follows. \nSenior Software Engineer, QA - Merpay\n雇用形態：正社員\n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） \n勤務地：六本木 \n詳細はキャリアサイトの募集要項 よりご確認ください\n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\n「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Mercari Culture Doc をご覧ください。\n組織・チームのミッション\nMercariのEngineering Principles\nメルカリのEngineering Principlesは、メルカリにおけるエンジニアリングの信念や行動の基盤となる共通認識です。Engineering Principlesは、組織のアイデンティティ（メルカリのミッション、バリュー、カルチャー）をエンジニアリングの観点から補完するよう設計されています。\nこれらEngineering Principlesは私たちが長期的に実現したい理想の姿を明確にし、最終的にメルカリのミッション達成に貢献するものです。\nPassion For The Product\nGrow Together\nSolve Through Mechanisms\nCollaborate Openly\n詳細については以下のリンクをご覧ください。\nエンジニアリングカルチャー\nメルペイのQA エンジニアリングチーム\nメルペイのQAチームは、革新的なプロダクトとサービスの高い品質を保証することに全力を尽くしています。従来のQA手法とAIを活用したテストソリューションを組み合わせることで、品質保証プロセスの最適化を図っています。チームの取り組みは、Webやモバイルアプリケーション、バックエンドシステムを対象に、仕様のレビュー、テストの計画や実行、バグの報告、プロセスの改善など、幅広い領域にわたります。\nメルペイのQAエンジニアは、私たち提供するサービスの品質を全体的に向上させるために広範な責任を担い、チームの重要な一員として活躍できるポジションです。現在チームは少人数の体制をとっているため、メンバーそれぞれが主体性を持って積極的に貢献できる環境となっています。\nメルカリのミッション・バリューについての詳細はこちら をご覧ください\n業務内容\n品質保証とテスト\nAIを活用したテスト自動化の可能性を特定して導入を進めながら、包括的なテストの計画立案やテストケースを実行する\nAIを活用した分析ツールを使用してテストデータを分析し、傾向やパターンを特定することでテストのカバレッジ向上や不具合予測の精度改善を図る\nAIを活用して効率と正確性を高めるQA戦略を設計・実装し、テストケースの作成、実行、分析に役立つAIツールの評価および統合を行う\n仕様のレビューと改善を行う\n中規模プロジェクト向けのテストを計画、設計、実施する\nテスト環境を管理する\nソフトウェアの不具合を報告し、追跡する\nAPIテスト、リグレッションテストの設計と実装や、運用保守を行う\nコラボレーションと調整\n開発チームと協力し、AIモデルの効果的なテストとソフトウェアへの統合を確実に行う\n関連するマイクロサービスの開発者との交渉や調整業務を行う\n複数のサービスやチームにまたがるQA業務の調整を行う\n担当するマイクロサービスでのテスト、バグ、チームメンバー管理を行う\nプロセス改善\nAI技術の導入を含め、開発プロセスの改善を行う\nWebやスマートフォンアプリ、バックエンドのテストを効率化し、自動化する\nQAにおけるAIの最新動向や推奨されるベストプラクティスを常に把握する\n技術環境\nJetpack Compose\nXCUITest\nPlaywright\nBigQuery\nLooker\nDatadog\nArkCI\nGitHub\nPostman\nTestRail\nCursor\nClaude Code\n社内AI Agent \nユニークなチャレンジ\nサービス開発が活発に行われるスピーディーな環境で業務を行うことができる\n複数のサービスやチームにまたがるQA活動の調整を担当できる\nQA業務における高い意思決定権を持てる\n多様なチームや社外パートナーと協力できる\n複雑な金融サービスの品質保証を担当できる\nAIを活用したのテストソリューションの実装と管理を行うことができる\n応募要件\n求める経験・スキル\n3年以上のソフトウェアQAとしての経験\nソフトウェアテストの知識や経験\nモバイルアプリ、またはWebアプリのQA経験\n優れた分析力と問題解決能力\n1年以上のテスト自動化フレームワークとAIを活用した自動化のご経験\nAIのコンセプトと、それをソフトウェアQAに応用することへの強い興味と理解\nプロジェクトでのプロセス改善知識や経験\nプロジェクトにおけるコミュニケーション能力\nビジネスレベルの日本語コミュニケーション能力\nメルカリグループのミッションとバリューに対する共感\n歓迎する経験・スキル\nソフトウェア開発経験\nAIツールやプラットフォーム（例：AIを使ったテスト生成ツール）に関する知識\n大規模データセットの分析やデータ可視化ツールの使用経験と、AIを使用したデータ主導型のQA判断に対する関心\nテスト環境の構築経験とCD/CIに関する知識\n自動テストの実装および運用に関連する経験と能力\n品質管理またはテスト管理の経験\nマイクロサービスで開発されたサービスのQA経験\n一からテスト計画を立案した経験\nメンバーのマネジメント経験\n金融業界や決済業界のQA経験\n歓迎スキル：機械学習モデルに関する経験\n語学力\n英語：日本語：Independent (CEFR - B2) / Basic (CEFR - A2)※CEFRの詳細については、こちら をご覧ください\n\nメルカリグループについて知る\nキャリアサイト：https://careers.mercari.com/en/ \nメルカン：https://mercan.mercari.com/en/ \nSNS：X / Linkedin \n 「インターンシップがきっかけで文系からエンジニアへ！ 」QAエンジニア｜私たちがメルカリで働く理由 （日本語版のみ）\n 生成AIの可能性を最大限に活かし、提供価値を最大化する。メルカリの生成AI社内活用、2024年下半期の取り組み （英語版あり）\n選考について\nメルカリグループではメルカリグループおよび各カンパニーのミッションとバリューへの共感・体現を大切にしています。メンバーが発揮する価値の総量が最大化されるような組織づくりを推進するために、候補者のみなさんの経験やスキルをより正しく理解したいと考えています。\n選考の流れ\n書類選考\n技術課題：エンジニアリング関連のポジションではHackerRankまたはGitHubでのスキル評価を受けていただきます。非エンジニアポジションでは、職種に応じてアセスメントを受けていただく場合があります。（面接タイミングと前後することがあります）\n面接：ポジションにより、複数回の面接をお願いします\nリファレンス：オンライン回答形式のもので、最終選考の前後でお願いします\nオファー：最終選考とリファレンスの内容より決定されます \n※詳しくはこちら のページをご覧ください\n選考における機会の平等\nメルカリでは、バックグラウンドによって個人の可能性が決めつけられることなく、自由に価値を生みだす機会を手にできる社会の実現を目指しています。そしてメルカリがミッションを実現するために「Inclusion & Diversity」という考え方は不可欠な存在だと考えています。\nこれはもちろん、私たちの採用方針にもあてはまります。採用活動においても、メルカリのミッション・バリューに共感する、様々なバックグラウンドの方にジョインしていただけるよう、年齢、性別、性的指向、人種、宗教、身体能力、その他記号に基づくあらゆる差別をなくすことを約束します。\n詳しくはI&D statement をご覧ください。\nなお、ご応募の際にはプライバシーポリシー をご確認ください。\n Senior Software Engineer, QA - Merpay\nEmployment Status:Full-time\nWork Hours:Full Flextime (no core time) \nOffice: Roppongi\nFor more details, see the Overview of Our Positions section on our Careers site. \nAbout Mercari\nCirculate all forms of value to unleash the potential in all people\n\"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 Mercari’s Culture Doc\nOrganization/Team Mission\n\nMercari Engineering Principles\nMercari 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.\nThese principles ultimately help us achieve Mercari’s mission by defining the ideal state we seek to realize in the long term.\nPassion For The Product\nGrow Together\nSolve Through Mechanisms\nCollaborate Openly\nFor more details, please see the following link:\nEngineering Culture\n\nMerpay QA engineering team\nThe Merpay QA team is dedicated to ensuring the highest quality of our innovative products and services. We employ a combination of traditional QA practices and AI-driven testing solutions to optimize our quality assurance processes. Our focus spans across various areas, including specification reviews, test planning, execution, bug reporting, and process improvement for both web and mobile applications, as well as backend systems.\nAs a QA Engineer at Merpay, you will play a crucial role in this effort, focusing on a broad scope of responsibilities that contribute to the overall quality of our offerings. The current small size of the team allows individuals to take ownership and contribute proactively.\n\nDevelopment Environment\nTools used: ArkCI / GitHub / Jetpack Compose / XCUITest / Playwright / BigQuery / Looker / Datadog / Postman / Slack / Jira / Confluence / TestRail / Notion\nAI assistance tools: Google Gemini / Cursor / ChatGPT /Claude Code\nSee here for more information about our mission and values.\nWork Responsibilities\nQuality Assurance & Testing\n\nDevelop and execute comprehensive test plans and test cases, with a focus on identifying and implementing opportunities for AI-powered test automation\nAnalyse test data to identify trends and patterns, using AI-driven analytics tools to improve test coverage and defect prediction\nDesign and implement QA strategies that incorporate AI to increase efficiency and accuracy, evaluating and integrating AI tools for test case generation, execution, and analysis\nPerform specification reviews and improvements\nPlan, design, and implement tests for medium-scale projects\nManage test environments\nReport and track software defects\nDesign and implement API tests and regression tests, and work on operation and maintenance\nCollaboration & Coordination\n\nCollaborate with development teams to ensure AI models are tested effectively and integrated into the software\nNegotiate and coordinate with relevant microservice developers\nCoordinate QA activities across different services and teams\nManage tests, bugs, and team members working on your microservice\nProcess Improvement\n\nImprove the development process, including the incorporation of AI methodologies\nStreamline and automate tests for web and smartphone apps and backend\nStay up-to-date with the latest advancements in AI for QA and recommended best practices\nUnique Challenges\nWorking in a fast-paced environment with frequent service development\nCoordinating QA activities across different services and teams\nHaving a high level of decision-making power in QA activities\nWorking with a diverse team and external partners\nHandling complex financial service quality assurance\nImplementing and managing AI-driven testing solutions\nQualifications\nRequired Experience/Skills\n3+ years of experience in software quality assurance\nSoftware testing knowledge and experience\nExperience in mobile, backend or web app QA\nStrong analytical and problem-solving skills\nExperience with test automation frameworks and a desire to learn AI-driven automation techniques\nA strong interest in and understanding of AI concepts and their application to software quality assurance\nKnowledge and experience related to process improvements for projects.\nProject communication ability\nBusiness-level Japanese communication ability\nShared belief in Mercari Group’s mission and values\nPreferred Experience/Skills\nSoftware development experience\nFamiliarity with AI tools or platforms for testing (e.g., AI-powered test generation tools)\nExperience in analysing large datasets and using data visualisation tools, with an interest in applying AI for data-driven QA decisions\nExperience building a testing environment and knowledge of CD and CI\nExperience and skills related to implementing and operating automated tests\nExperience in quality control or test management\nExperience in QA for services developed with microservices\nExperience drafting test plans from scratch\nExperience with people management\nExperience in QA for the financial or payments industry\nBonus Points : Experience with machine learning models\nLanguageCandidates must meet at least one of the following language proficiency requirements \n\nEnglish (Independent - CEFR B2) / Japanese (Independent - CEFR B1) \nJapanese (Independent - CEFR B2) / English (Basic - CEFR A2) \nFor details about CEFR, see here.\nLearn More About Mercari Group\nCareers site: https://careers.mercari.com/en/ \nMercan: https://mercan.mercari.com/en/ \nSocial media: X / Linkedin \n 「インターンシップがきっかけで文系からエンジニアへ！ 」QAエンジニア｜私たちがメルカリで働く理由 (only in Japanese)\n 生成AIの可能性を最大限に活かし、提供価値を最大化する。メルカリの生成AI社内活用、2024年下半期の取り組み (English available)\nRecruiting at Mercari\nAt 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.\nRecruiting cycle at Mercari Group\nApplication screening\nSkill 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.)\nInterview: The number of interviews may vary depending on the position.\nReference check: We will ask for online references around the timing of the final interview.\nOffer: Offers will be determined carefully in consideration of the final interview and the reference check.\nLearn more about our recruiting process here.\nEqual Opportunity Hiring\nHere 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.\nThis, 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 I&D statement.\nPlease read and acknowledge our Privacy Policy prior to submitting your application.","description_format":"text","description_chars":11586,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Elementary (A1)","optional":true},{"language":"Japanese","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Marketplaces","Secondhand"],"lifecycle":[{"event":"open","at":"2022-01-05T00:00:00Z"},{"event":"close","at":"2026-08-13T11:19:34Z"},{"event":"reopen","at":"2026-09-10T17:53:35Z"}],"visa":[],"liveness":{"score":22,"band":"cold","label":"Long shot","p_open":1,"p_active":0.608,"p_room":0.36,"age_days":148,"expected_fill_days":83,"reasons":["conf:0","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/mercari-software-engineer-qa-merpay","json_url":"https://alion.io/job/mercari-software-engineer-qa-merpay.json","meta":{"generated_at":"2026-10-18T09:01:47Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":13441,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":914},"rest":"https://alion.io/mcp/rest/get_company?id=914"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmercari-software-engineer-qa-merpay"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmercari-software-engineer-qa-merpay"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmercari-software-engineer-qa-merpay"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/mercari-software-engineer-qa-merpay\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmercari-software-engineer-qa-merpay"}]}