Job Description: The Intern Experience: At Rakuten, we pride ourselves on giving interns a genuine, immersive experience that has a direct impact on company objectives. You will do meaningful work, and with us, you’ll be a true member of the team. We are also invested in your growth as an individual and professional. That’s why you can expect curated events such as professional development workshops, interactions with Rakuten leadership, and relationship building opportunities with other interns and professionals at the company. You can visit rakuten.us and our Muse profile, to learn more about Rakuten’s culture and values, as well as hear from last year’s interns. Business Unit Introduction: Rakuten Group, Inc. is a global leader in internet services, offering a dynamic ecosystem of over 70 services across e-commerce, FinTech, digital content, and communications. Founded in 1997, Rakuten’s mission is to empower people and society through innovation and entrepreneurship. With a vision of driving disruptive innovation globally, Rakuten integrates various services under a unified brand, supported by a unique ecosystem model that leverages data and AI. The company’s popular "Rakuten Points" program and “One ID” system enhance user engagement, providing seamless access to its diverse services. Headquartered in Japan, Rakuten has achieved 27 consecutive years of revenue growth and is recognized for fostering a diverse and inclusive corporate culture, with English as its official language since 2012. In recent years, Rakuten has focused on AI and sustainability initiatives, aiming to drive further technological advancements and achieve carbon neutrality. SUMMARY: We are seeking innovative and dedicated Software Engineer to join the Rakuten AI User Experience team. Rakuten AI strives to be your Rakuten AI companion, providing the best AI user experience — generally, contextually, and personally. Rakuten AI aims to serve as the AI Core of the Rakuten ecosystem, enhancing interconnections between Rakuten services and users to delight customers worldwide more than ever before. This role involves advancing the AI user experience to serve as the foundational core across the Rakuten products ecosystem by developing innovative AI user experience framework. The ideal candidate will have a strong passion for building solid, flexible, and immersive AI user experiences using state-of-the-art technologies and will contribute to a unified vision that enhances Rakuten AI foundation at scale. We also welcome exceptional engineers from diverse fields who may not have direct experience in AI. This role is an opportunity to gain critical skills and knowledge needed to transition into the AI space. We are dedicated to supporting career changers who bring unique perspectives and expertise. Our commitment includes offering mentorship and resources to facilitate your growth in cutting-edge AI domains. KEY RESPONSIBILITIES: Develop and Maintain Web Applications: Design, build, and maintain front-end and back-end features for web applications, ensuring they are scalable and high-performing. Build AI Front-End User Experience: Use HTML, CSS, JavaScript, and frameworks like React, Angular, or Vue to create intuitive and responsive user interfaces. Develop AI Back-End Services: Build server-side logic and APIs using technologies like Node.js, Python, Java, or Ruby. Building highly flexible, scalable Agentic AI Framework by leveraging popular AI toolset like LangChain etc. Data schema design and database management: Design and manage databases, such as MySQL, MongoDB, PostgreSQL, or others, ensuring efficient data storage and retrieval. Integrate APIs and Third-Party Services: Integrate external APIs and services, such as OpenAI APIs, payment gateways, social media APIs, or analytics tools, as needed. Perform Testing and Debugging: Write unit, integration, and end-to-end tests, troubleshoot issues, and resolve bugs across the full stack of the application. Optimize for Performance: Improve performance by optimizing application code, databases, and server configurations to reduce latency and increase efficiency. MINIMUM REQUIREMENTS: Proficiency in front-end technologies like HTML, CSS, and JavaScript, and experience with at least one modern front-end framework (e.g., React, Angular, or Vue). Proficiency in Back-End Development, knowledgeable of server-side languages such as C#, Java, Python, Node.js, Ruby, or PHP and familiarity with building RESTful APIs and knowledgeable of Web Development Frameworks Knowledge/familiarity with variety of data schema design, and database management, e.g. relational databases (e.g., MySQL, PostgreSQL) and/or NoSQL databases (e.g., MongoDB, Cassandra). Proficiency in debugging and problem-solving across both front-end and back-end systems. Ability to write clean, maintainable code, adherence to coding standards and best practices, with a focus on creating well-organized, readable, and maintainable code. Adaptability and willingness to learn, ability to quickly learn new technologies and adapt to changing project requirements. QUALIFICATION REQUIREMENTS: Bachelor’s Degree or above in Computer Science or related field or equivalent practical experience. Experience with testing practices and experience with unit testing, integration testing, and end-to-end testing. Experience in AI-related projects or products strongly preferred. Five Principles for Success Our worldwide practices describe specific behaviors that make Rakuten unique and united across the world. We expect Rakuten employees to model these 5 Shugi Principles of Success. Always improve, Always Advance - Only be satisfied with complete success - Kaizen Passionately Professional - Take an uncompromising approach to your work and be determined to be the best Hypothesize - Practice - Validate – Shikumika - Use the Rakuten Cycle to succeed in unknown territory Maximize Customer Satisfaction - The greatest satisfaction for our teams is seeing their customers smile Speed!! Speed!! Speed!! - Always be conscious of time - take charge, set clear goals, and engage your team Rakuten provides equal employment opportunities to all employees and applicants for employment and prohibits discrimination and harassment of any type. Rakuten considers applicants for employment without regard to race, color, religion, age, sex, national origin, disability status, genetic information, protected veteran status, sexual orientation, gender, gender identity or expression, or any other characteristic protected by federal, state, provincial or local laws. Rakuten International oversees 7 businesses with over 4,000 employees globally. The brand is recognized for its leadership and innovation in e-commerce, digital content, advertising, entertainment, and communications, bringing the joy of discovery and access to more than 1 billion members across the world. Everyday team members deliver on the company’s mission to delight merchants and customers through innovation, optimism, and teamwork. The Consolidated Appropriations Act’s Transparency in Coverage Rules require group health plans to disclose on a public website information regarding in-network provider rates and historical out-of-network allowed amounts and billed charges for covered items and services in two separate machine-readable files (MRFs). The MRFs for Rakuten’s Aetna benefit plan are provided in the link below. Aetna Transparency in Coverage: Machine-Readable Files | Rakuten

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20 Jan, 2026

rakuten.com

EDB-IPP Project: Personalization and Long-Context Modeling in Large Language Models

Data & ML

Crimson House Singapore, Singapore

Salary not listed

more at rakuten.com.

EDB-IPP Project: Personalization and Long-Context Modeling in Large Language Models

EDB-IPP Project: Advancing Domain-Specific Multimodal Large Language Models and AI Governance for Vertical Domain Applications

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