掲載データをもとに当社が整理したものです。選考の通りやすさや社風は、担当にお尋ねください。
非上場。見積もりプラットフォーム「ミツモア」および現場仕事の業務支援システム「プロワン」の開発・運営。出典: gBizINFO（法人番号公表サイト・職場情報総合サイト等）（法人番号8010401129702）。資本金は未確認。
非上場。見積もりプラットフォーム「ミツモア」および現場仕事の業務支援システム「プロワン」の開発・運営。出典: gBizINFO（法人番号公表サイト・職場情報総合サイト等）（法人番号8010401129702）。資本金は未確認。
休日・休暇
応募資格・経験
勤務地・通勤
業界（大分類）
システム・技術領域
【言語要件に関する重要事項】
本ポジションは英語で業務遂行が可能な方を対象としています。
社内コミュニケーションは主に英語（一部日本語・翻訳ツール併用）で、選考プロセスもコホン英語で実施します。
日本語は日常会話レベル、または学習意欲があれば応募可能です。
■仕事についての詳細
About the position
We're looking for a Senior Software Engineer who is passionate about building reliable, scalable, and maintainable systems — from backend business logic to frontend user experiences.
You'll work primarily with TypeScript, with React
Next.js on the frontend and NestJS
Prisma on the backend. You'll collaborate closely with both engineers and non-engineers (product, design, biz/ops) to ship features that power the core of our product for some of Japan's largest enterprise customers.
Our Tech Stack
Not exhaustive, but the most important are:
TypeScript everywhere;
Node.js;
NestJS
Prisma
PostgreSQL on the backend;
React
Next.js on the frontend, React Native (Expo) on mobile; and
AWS (EKS, S3, Lambda); and
Redis.
Responsibilities
Design and deliver features end-to-end across the stack (frontend, backend, architecture).
Take ownership of technically challenging projects, such as refactoring, complex data modeling, or new platform integrations.
Drive improvements in system reliability, performance, and maintainability.
Mentor other engineers and champion high standards in code quality and architecture.
Participate in support rotations to investigate bugs and incidents.
We value engineers who care deeply about technical quality, end-user experience, and long-term stability — not just shipping tickets fast.
How we use AI in development
We are bullish on AI as a development tool, and provide free usage of AI tools like Claude Code for our engineers. We have an internal AI task force responsible for policy, guidelines, oversight, and technology in order to empower our engineers to use AI safely and efficiently.
Requirements
7+ years of professional software engineering experience.
Significant experience with TypeScript.
2+ years of hands-on work with React (or a similar modern frontend framework).
Strong understanding of backend frameworks, database modeling (SQL/Prisma), and asynchronous app architecture.
Proficiency collaborating across functions (product, design, operations, and stakeholders).
Track record of delivering production systems with an emphasis on scalability, reliability, testability, and maintainability.
Familiarity with modern development workflows: Git, PR reviews, CI/CD, and automated testing.
Be located in, or be willing to relocate to, Japan (we will support relocation).
Nice to haves
While not specifically required, tell us if you have any of the following.
Experience with our specific stack: NestJS, Prisma, PostgreSQL, AWS.
Development and operation using containers (e.g. Docker).
Cloud infrastructure experience (e.g. AWS or GCP).
Familiarity with AI-assisted development workflows (e.g. Claude Code, Cursor).
Experience building B2B or enterprise SaaS products.
Conversational-level Japanese.
What makes this role compelling
A diverse team of strong engineers. Engineers from 12+ countries bring diverse perspectives and skills.
High-growth, real-world impact. ProOne is a vertical SaaS product developed by Meetsmore growing rapidly in Japan's service industry. Your work directly impacts how thousands of businesses operate daily.
LINEで相談する・応募する
フォーム入力も経歴書も不要です。「Senior Software Engineer」について聞きたいとLINEで送っていただければ、担当（松岡）が直接お返事します。質問だけ・情報収集だけでもかまいません。
すでに友だちの方は②だけでかまいません（求人名が入った状態でLINEが開きます）。うまく開かないときは、LINEで ID @697nxhbt を検索してください。
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まだ転職を決めていない段階でもかまいません。経歴書のご用意は不要です。この求人の背景や求められている経験など、公開情報にないところからお話しします。
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