Job Description:
Business Overview
Rakuten is a leading Japanese e-commerce and internet services company that offers a wide range of products and services to customers worldwide. With a strong focus on innovation, Rakuten aims to empower individuals, businesses, and society as a whole through its unique ecosystem of e-commerce, fintech, digital content, and communications services.
Department Overview
The Merchandising and Advertisement Department leverages AI-driven advertisement optimization, and pricing and inventory optimization systems based on demand forecasting. By closely integrating the information obtained from merchandising into our advertisement strategies, we maximize the synergy between both functions. This enables us to efficiently deliver optimal offers and information to our customers, thereby contributing to increased sales and enhanced customer satisfaction.
The Advertisement Optimization Group is a team of specialists in ad optimization, with AI at its core. We are responsible for the development and operation of highly effective ad optimization logic and platforms.
Our mission is to maximize publishers' ad revenue while maintaining and improving advertisers' ROAS (Return On Ad Spend). Specifically, we continuously improve ad delivery optimization, bidding/budget allocation, personalization, and performance measurement, contributing to the realization of a world that enhances both advertisers' ROI (Return On Investment) and user experience.
Position:
Position Details
We are looking for a Software Engineer to lead the design, development, and optimization of complex data processing pipelines and high throughput APIs. You will guide technical decisions, mentor engineers, and ensure that our platforms remain robust, scalable, and aligned with long-term business goals. This role is ideal for individuals who thrive in highly technical environments and enjoy solving challenging problems with modern engineering practices.
Responsibilities
- Lead the design and architecture of large-scale, distributed software systems.
- Develop high-quality, maintainable code across the full SDLC.
- Collaborate with product, design, and engineering stakeholders to define technical requirements and project scope.
- Drive engineering best practices including code reviews, testing strategies, standards, and documentation.
- Mentor and support junior/mid-level engineers through guidance, pairing, and knowledge sharing.
- Identify and resolve complex issues related to performance, scalability, and system reliability.
- Contribute to long-term technical strategy, platform modernization, and technology roadmap planning.
- Evaluate and integrate new tools, frameworks, and technologies to improve development efficiency.
- Experience leading technical initiatives, migration projects, or cross-team engineering efforts.
Mandatory Qualifications:
- Bachelor's or Master's degree in Computer Science, Engineering, or equivalent experience.
- 7+ years of professional software engineering experience.
- Deep expertise in at least one modern language (e.g., Python, Java, Go).
- Strong understanding of system design, distributed systems, microservices, and cloud architectures.
- Experience with REST APIs, event-driven systems, and asynchronous processing.
- Proven experience developing and deploying applications on GCP.
- Strong competency in data structures, algorithms, and software design patterns.
- Hands-on experience with CI/CD, testing frameworks, and Git-based workflows.
- Ability to navigate technical ambiguity, make sound architectural decisions, and clearly articulate technical trade-offs to both technical and non-technical audiences.
Desired Qualifications:
- Experience with Docker, Kubernetes, or other container orchestration tools.
- Background in high-availability or mission-critical systems.
- Knowledge of SQL/NoSQL databases, caching strategies, and data pipelines.
- Familiarity with observability tools (Prometheus, Grafana, ELK, OpenTelemetry).
- Exposure to security best practices, secure coding, and compliance requirements.
#engineer #applicationsengineer #AI #aianddatadiv
-
Tokyo Rakuten ￥3,000,000 - ￥3,800,000 per yearWe are looking for a Software Engineer to lead the design development and optimization of complex data processing pipelines high throughput APIs. · You will guide technical decisions mentor engineers ensure our platforms remain robust scalable · and aligned with long term busine ...
-
Tokyo Rakuten Full time￥9,000,000 - ￥12,000,000 per year+We are looking for a Software Engineer to lead the design, development, and optimization of complex data processing pipelines and high throughput APIs. · +Bachelor's or Master's degree in Computer Science, Engineering, or equivalent experience. · 7+ years of professional softwar ...
-
Tokyo G Talent ￥720,000 - ￥1,020,000 per yearAs a Software Engineer in Advanced Development, you will gain extensive development experience as a software engineer working on new mobility-related services and R&D. · Prototyping, requirement definition, implementation, verification, and evaluation for new service realization ...
-
Tokyo NVIDIA ￥10,000,000 - ￥20,000,000 per yearWe are looking for outstanding Deep Learning Software Engineers to develop and productize NVIDIA's deep learning solutions for use in real-life consumer products. · Push the boundaries of the state of the art in DNN performance and efficiency, including model compression, quantiz ...
-
Tokyo RakutenWe are looking for a Senior Software Engineer to join our team and contribute to the development of faster and more resilient web services. · In this role, you will partner with Product Managers to design and build robust, globally scalable web applications. · This position inclu ...
-
Tokyo Rakuten Full timeWe are looking for a Senior Software Engineer to join our team and contribute to the development of faster and more resilient web services. · ...
-
Tokyo Rakuten ￥20,000,000 - ￥25,000,000 per yearWe are seeking a highly skilled and motivated Cloud-Native Software Development Engineer to join our innovative team. In this pivotal role, you will be instrumental in developing our Universal Control Plane application, a cutting-edge platform designed to unify and streamline res ...
-
Tokyo Rakuten Full time￥8,000,000 - ￥12,000,000 per yearWe are seeking a highly skilled and motivated Cloud-Native Software Development Engineer to join our innovative team. In this pivotal role, you will be instrumental in developing our Universal Control Plane application, a cutting-edge platform designed to unify and streamline res ...
-
SE_Software Engineer
2ヶ月前
Tokyo Capgemini Full time￥6,000,000 - ￥12,000,000 per yearソフトウェアエンジニアとして、DXに関連する数億円規模のシステム開発プロジェクトで要件定義、設計、開発などの業務に携わる。プロジェクトは大手企業からのプライム案件がメインとなり、全行程を外部に発注せず一気通貫で内部完結している。クラウドネイティブアーキテクチャ、コンテナ、マイクロサービスなど先端技術に注力しているため、様々な領域にチャレンジできる。国内プロジェクト、グローバルプロジェクト、いずれも参画の可能性がある。 · ソフトウェアエンジニアとして、DXに関連する数億円規模のシステム開発プロジェクトで要件定義、設計、開発などの業務に携わる。 · プロジ ...
-
Tokyo Capgemini Full time￥7,500,000 - ￥15,000,000クラウドスペシャリストとしてクラウドの各種マネージドサービスのアーキテクチャリングや提案活動の支援、設計構築、新たなサービスの技術検証をおこなっていただきます。 · クラウドネイティブアーキテクチャの検討および提案活動支援 · クラウドネイティブアーキテクチャの設計・構築 · クラウドを利用しているプロジェクトの技術支援 · オンプレミス、AWS、Azure、GCPいずれかでのインフラ設計・構築経験3年以上 · オンプレミスからAWS、Azure、GCPへの移行経験 · 論理的思考、コミュニケーション力 · ネイティブレベルの日本語力 · フレックスタイ ...
-
Tokyo Rakuten ￥3,500,000 - ￥6,000,000 per yearThe Product Manager will contribute to the growth of the Affiliate service provider through product management, working closely with the engineering and business teams to deliver user-focused products that support both client success and business growth. · Digestion & prioritizat ...
-
Tokyo Rakuten Full time￥4,000,000 - ￥8,000,000 per yearThe Ad Product Development Department and Product Management Section are primarily responsible for the planning, development, and operation of advertising products for stores, facilities, major companies operating domestically and internationally, and foreign-affiliated companies ...
-
Tokyo Appier ￥8,000,000 - ￥15,000,000 per yearAppier is seeking a Senior Machine Learning Scientist to join our Advertising Cloud Optimization team, which leads the development of core machine learning algorithms driving campaign efficiency and advertiser ROI. · ...
-
Tokyo Appier Full time￥10,000,000 - ￥20,000,000 per yearAppier is seeking a Senior Machine Learning Scientist to join our Advertising Cloud Optimization team, which leads the development of core machine learning algorithms driving campaign efficiency and advertiser ROI. · Design, implement, and productionize state-of-the-art ML models ...
-
Tokyo Rakuten ￥3,000,000 - ￥6,000,000 per yearWe will increase the number of new Rakuten Mobile subscribers in the web marketing area and promote expansion of market share. The Digital Marketing Section will promote the planning, implementation, and analysis of web marketing strategies to acquire new Rakuten Mobile customers ...
-
Tokyo Rakuten Full time￥3,000,000 - ￥6,000,000 per yearThe Marketing Division leads brand, creative, marketing, and membership as a cross-group organization with a mission to expand Rakuten Group's membership value and ecosystem of over 70 services. · Planning, implementation, and analysis of web marketing strategies: Devising measur ...
-
Tokyo Appier ￥4,000,000 - ￥8,000,000 per yearAbout Appier · Appier is a software-as-a-service (SaaS) company that uses artificial intelligence (AI) to power business decision-making. · Founded in 2012 with a vision of democratizing AI, · Appier's mission is turning AI into ROI by making software intelligent. · ...
-
Digital Consultant
2ヶ月前
Tokyo RGF Professional Recruitment Japan ￥5,500,000 - ￥7,500,000 per yearPlan and optimize advertising campaigns, guide strategy with data insights, and help clients adopt best-in-class digital tools and processes. · 2+ years in digital advertising operations, media planning, or consulting · Experience with ad platforms (Google, Meta, LINE, DSPs) · St ...
-
Tokyo Rakuten Full time￥800,000 - ￥1,600,000 per yearWe are seeking data scientists who can drive initiatives end to end—from hypothesis formulation and modeling to online deployment, evaluation, and continuous improvement. · Problem definition for ad delivery optimization and the design of KPIs/metrics, along with observability (d ...
-
Tokyo Rakuten ￥800,000 - ￥1,600,000 per yearJoining us, you will be able to challenge yourself in a wide range of technologies in the frontline of heavy traffic large scale ad applications and platforms, including high performance system development and big data processing systems. · ...
-
Tokyo Rakuten ￥600,000 - ￥1,800,000 per yearResearch Scientist, Fintech Optimization at Rakuten AI & Data Division (AIDD) in Tokyo, Japan. Develop technically strong solutions for fintech companies, communicate with business personnel, and work with project management team to gather business requirements. · ...
