ITエンジニア（IT・Web・通信・ゲーム）/東京23区の転職求人一覧

Key ResponsibilitiesDesign and build high-performance frontend applications utilizing React, Next.js, and TypeScript. Develop scalable backend services, interoperable libraries, and REST/gRPC APIs using Kotlin and Rust. Integrate robust security measures, including authentication and authorization flows via OAuth2, OpenID Connect (OIDC), and JWT. Build and maintain deployment automation and CI/CD workflows using GitHub Actions and modern Git practices. Work heavily with cloud-native infrastructure, deploying and managing containerized applications in Kubernetes environments. Collaborate on data-heavy initiatives, integrating with data engineering teams using tools like Databricks and Spark-based workflows.#LI-Hybrid#LI-KN

About the RoleAs a Business System Analyst, you will be responsible for bridging the gap between business needs and technical capabilities. You will work closely with users and the project team to gather requirements, design robust data solutions, and guide the implementation process.Key Responsibilities・Collaborate with users and the project team on requirements and expectations.・Analyze business requirements and create data solutions that meet functional and non-functional needs.・Analyze existing systems to trace original source data based on business requirements.・Work with the Application Development team to implement data strategies and build data flows.・Guide System Analysts, Engineers, Programmers, and others on project limitations, capabilities, performance, and interfaces.・Discover metadata of source databases, including value patterns, key candidates, and functional dependencies.・Design logical and physical data models.・Create desi

Role & Responsibilities:As a Senior SRE, you will serve as a guardian of system availability and performance. You will be responsible for defining and monitoring SLOs, automating infrastructure lifecycles, and leading incident response efforts. By leveraging modern cloud architecture and IaC practices, you will minimize operational toil and build golden paths that enable development teams to deliver secure, high-quality code at speed. You will play a central role in complex system design, ensuring that massive-scale transactions remain stable, redundant, and highly available.Main tasks include:■ Design and maintain SLI/SLOs for critical services in collaboration with cross-functional teams.■ Architect resilient systems for failover, redundancy, and disaster recovery to ensure data integrity.■ Forecast resource demand and lead capacity planning for cost-effective scaling.■ Develop and execute CI/CD pipelines using IaC and container orchestrat

Role & Responsibilities:As a Senior Full Stack Developer, you will be instrumental in the end-to-end development of web and mobile applications. You will bridge the gap between complex data architecture and intuitive user experiences, ensuring that all systems are scalable, secure, and fully functional. Reporting to the development leadership, you will play a key role in shaping system architecture and mentoring the engineering team to deliver sophisticated software solutions.Main tasks include:■ Develop new user-facing features using React.js and React Native.■ Implement server-side logic and data management using Spring Boot Java and Redis.■ Design robust system architectures, data structures, and database schemas.■ Translate complex wireframes and designs into high-quality, maintainable code.■ Optimize application performance across various web browsers and devices.■ Collaborate with product managers and UX designers to define and ship in

Role & Responsibilities:You will serve as a technical cornerstone for the API gateway and management infrastructure. You will be responsible for conducting rigorous feasibility studies and driving high-level design strategies that impact product quality and delivery speed across the organization. This role requires a balance of strategic architectural planning and hands-on technical contributions, providing you with the opportunity to influence the technical evolution of a core platform while collaborating with diverse, cross-functional teams.Main tasks include:■ Lead high-level system design for API infrastructure and management tools.■ Conduct technical feasibility assessments and research on emerging industry trends.■ Author comprehensive technical specifications and architecture design documentation.■ Perform meticulous code reviews to ensure excellence in development standards.■ Develop production-quality code and prototypes to support

We are looking for a Middle/Senior Level Data Engineer to design, build, and operate end-to-end data solutions for a retail client in Japan. Key Responsibilities:Lead the design, build, and optimization of ETL/ELT pipelines to ingest data into the enterprise platform. Drive automation to eliminate manual intervention and enforce rigorous data quality standards. Ensure technical solutions align with enterprise architecture while leveraging new Snowflake and AWS capabilities. Implement metadata management, data lineage tracking, and role-based access controls.#LI-Hybrid#LI-KN

【仕事内容】お客様のネットワーク環境をサポートし、技術的な課題解決を行うポジションです。特に重要かつ複雑な問題に対して、技術的な支援を提供します。主な業務内容：-ネットワーク障害の調査・トラブルシューティング-顧客からの問い合わせ対応-障害の原因分析とレポート作成-顧客の運用チームとの連携、定期的な技術レビューの実施-技術資料の提供やナレッジ共有による顧客支援-必要に応じてネットワークの改善提案

【具体的な業務】・顧客環境（クラウド／オンプレ）における生成AIシステム設計／実装・RAG、エージェント設計、ワークフロー自動化の構築・プロンプト設計、評価設計、品質改善サイクルの確立・API／バックエンド／フロントエンドを含むフルスタック開発#LI-Hybrid#LI-KN