Our client is a large-scale technology company operating globally, with a strong presence across multiple digital services such as online platforms, fintech, communications, and media. They serve a vast and diverse user base and continue to invest heavily in data and AI-driven innovation. The team is responsible for building and evolving data platforms that power analytics and personalization across various products. They work in a highly collaborative, international environment with a strong engineering culture. We are looking for an experienced Software Engineer to contribute to the development of scalable data systems and intelligent applications. This role involves working across the full development lifecycle and playing an active part in technical decision-making. Key Responsibilities Design and develop backend services and data-driven applications Contribute to system architecture and technical strategy Build and optimize large-scale data processing pipelines Ensure system reliability, scalability, and performance Participate in code reviews and provide technical guidance Collaborate with cross-functional teams including data and product stakeholders Qualifications Job Level · Senior (approximately 8+ years of professional experience or equivalent skills) Mandatory Skills / Experience High level of familiarity with the full web stack Expert/Senior level in at least one of the major/modern computer languages including but not limited to Python, C/C++, Java, or Go, etc. Interest and ability to learn other coding language(s) or new technologies(s) as needed. Experience with modern CI/CD processes & DevOps Experience with Cloud Native Technologies (E.g. Docker, Kubernetes) Bachelor's degree in Computer Science (or related technical/scientific field) or equivalent practical experience Business Level English Desired Skills / Experience Experience with data engineering, including ETL, data warehousing, and handling large datasets Knowledge of distributed computing technologies (Hadoop, Spark, Kafka, Kubernetes) Familiarity with relational and NoSQL databases Experience with public cloud platforms (AWS, Azure, GCP) Solid understanding of software development best practices (testing, code reviews, CI/CD, Git) Familiarity with multiple architectural patterns and design principles Experience leading engineering teams, including people management, project oversight, and cost management Experience in the Marketing Technology (MarTech) domain is a plus Languages English: Fluent Japanese: Optional / a plus Work Environment Fast-paced, dynamic global environment with collaborative teams across multiple locations Technology Environment Backend: Python (Django, Flask), Go API: REST, GraphQL Infrastructure: Docker, Kubernetes, Helm DevOps: GitLab CI, Argo Workflows, Argo CD Data: Presto/Trino, Hive, Hadoop, Spark, PostgreSQL, SQL/HQL Monitoring: Sentry and other tools. Salary: 8M 12M JPY per year Location: Hybrid (4 days in the office, 1 day remote) Office Location: Tokyo, Japan Working Hours: Flexible schedule with core hours from 11:00 AM to 3:00 PM Visa Sponsorship: Available Language Requirement: English only Apply now or contact us for further information: