勤務地
東京都 23区
雇用形態
正社員
給与
800万円 ~ 1100万円
リモートワーク・在宅勤務服装カジュアル残業少なめフレックスタイム制
Our client operates one of Japan's largest and fastest-growing cultural marketplace platforms, serving over 6 million monthly users with an exceedingly large amount of annual GMV.
Background for This Hire
The platform is entering its 8th year, and rapid growth has resulted in an extremely large codebase. The monolithic architecture can no longer handle the complexity at scale, and the team is now actively pursuing a modular monolith migration to rebuild a more flexible, sustainable system. They are looking for engineers who can go beyond traditional API development, someone who can design with a strong awareness of DDD and module boundaries, and that can collaboratively build a robust and maintainable architecture. This position is expected to serve as a core member driving the migration while also contributing to feature development.
Responsibilities
- Driving the modular monolith migration: designing and implementing with module boundaries in mind, redesigning existing code, and building robust systems based on DDD
- Improving performance and scalability: designing and implementing APIs capable of handling 10,000+ rps, leveraging async processing and caching, and query performance tuning
- Resolving technical debt: driving large-scale refactoring, library updates, and other initiatives that contribute to the sustainable growth of the service
- New feature development
What Makes This Role Attractive
- Deeply involved in a large-scale re-architecture that underpins the entire service, not just feature additions
- Demands a high level of design and refactoring expertise — redesigning tens of thousands of lines of code into thousands
- Small, senior team where you lead product-focused development that prioritizes outcomes from both a business and technical perspective
Tech Stack
- Languages: Go / TypeScript
- Frameworks: Next.js (App Router) / Vue.js
- Infrastructure: AWS (ECS / Aurora / ElastiCache / S3 / CloudFront / SQS / SNS) / Firebase
- Monitoring: Datadog / Sentry
- CI/CD: GitHub Actions
- AI Tools: Claude Code, Cursor
- Common: GitHub, Notion, Slack
職務経験
3年以上
キャリアレベル
中途経験者レベル
英語レベル
無し
日本語レベル
ビジネス会話レベル
最終学歴
短大卒： 準学士号
現在のビザ
日本での就労許可が必要です
Required Qualifications
- Development experience at a company that builds its own web services in-house
- Backend development experience in Go (3+ years preferred; candidates with 3+ years in Kotlin, Java, Ruby, or Python are also welcome)
- Experience with cloud infrastructure such as AWS or Google Cloud
- Agile development experience collaborating across departments
Preferred Qualifications
- Experience leading a team or project through technical leadership
- Experience re-architecting legacy code
- Practical experience with DDD (Domain-Driven Design)
- Experience designing and tuning table schemas and queries in MySQL with performance and maintainability in mind
- Experience operating services with large-scale traffic exceeding 10,000 rps
- Experience mentoring or managing developers
Ideal Candidate
- Takes initiative and works across technical domains in a small, elite team
- Values DDD-conscious design and wants to be involved in building robust systems
- Engages with the entire value stream and acts with business outcomes as the top priority
雇用形態正社員給与800万円 ~ 1100万円
募集について
本求人は転職サイトCareerCross（キャリアクロス）がIndeedへの掲載を行っております。
【求職者の方のお問い合わせについて】
■ 求人内容に関するお問い合わせ
CareerCrossは求人掲載サービスのため、各求人の詳細な職務内容や選考内容につきましては、掲載企業様より直接ご案内いただいております。
ご応募後、企業様から返信があった場合は、CareerCrossサイト内で企業の担当者様と直接やり取りが可能となります。求人内容や選考に関するご質問につきましては、企業様へ直接ご確認ください。
■ CareerCrossのサービスに関するお問い合わせ
CareerCrossのサービス利用方法等に関するお問い合わせにつきましては、以下までご連絡ください。
電話：03-5217-3900
問い合わせフォーム：https://www.careercross.com/suggestion
【CareerCross求人掲載企業様のお問い合わせについて】
Indeedでは求人の掲載停止や内容変更の手続きができません。
大変お手数ですが、該当のご依頼につきましてはCareerCross（当社）までご連絡いただけますと幸いです。
電話番号：03-5217-3900
メール：[email protected]
