Software Engineer (Contract)

Job Description: This is a 1 year contract position Rakuten Group, Inc. is a global leader in internet services and has a diverse ecosystem spanning across e-commerce, fintech, communications and more serving approximately 1.8 billion members worldwide. Founded in Tokyo in 1997, the Group operates in over 30 countries and regions with more than 30,000 employees. Based in Singapore's Central Business District, Rakuten Asia Pte. Ltd. serves as the regional headquarters for Asia, driving value through areas such as advertising product development, product strategy, and data management to support Rakuten Group's global ecosystem. Learn more at: https://global.rakuten.com/corp/ The Global Ad Technology Department (GATD) manages the whole of the advertising systems that power Rakuten. We are a cross-functional and data-driven organization working together in a diverse team spread across five countries: Japan, Singapore, India, China and UK. GATD Website: https://corp.rakuten.co.jp/careers/feature/adtech/en/ We are seeking a Senior Software Engineer (Backend focus) to design, develop, and maintain scalable, high-performance backend services and APIs using Java and Spring Boot. The role involves translating business requirements into technical solutions, participating in the full software development lifecycle, ensuring system stability and reliability, and driving continuous improvements in architecture, development practices, and operational efficiency. The ideal candidate is passionate about building robust systems, solving complex technical challenges, and leveraging new technologies to enhance platform capabilities and engineering productivity. Responsibilities: • Design and develop high-quality, scalable, and maintainable backend services and APIs using Java/Springboot. • You will be responsible for translating complex business requirements into robust technical designs and efficient code implementations. • Participate in the full web application development lifecycle, including architecture design, middleware selection, development, configuration, release, and system operations. Detect root causes of issues and collaborate with team members for proactive recovery, taking ownership of service/system stability. • Propose new technologies and tools to improve system architecture, improve system capability and enhance development efficiency. Requirements: • 5 years of professional experience in web application development using Java and Spring in a Micro-service architecture. • Proficiency in API development (REST), including OpenAPI specifications, ORM frameworks, and database schema design. • Ability to analyze technical trade-offs and make informed decisions regarding software design. • Advanced SQL knowledge, including complex query. • Experience with unit testing frameworks (e.g., JUnit). • Ability to design system architectures and evaluate/integrate various open-source software (OSS). • Bachelor's degree in Computer Science, Engineering, or a related technical field. Rakuten is an equal opportunities employer and welcomes applications regardless of sex, marital status, ethnic origin, sexual orientation, religious belief or age.