Rakuten International, a division of Rakuten Group, Inc., headquartered in San Mateo, California, is seeking an Early Career AI Engineer for an on-site contract position in the United States (San Mateo, CA or Bellevue, WA). The role supports the Rakuten AI User Experience team, building an innovative AI UX framework to serve as the AI core across Rakuten's products. Responsibilities include designing, building, and maintaining web applications with scalable front-end and back-end features; creating intuitive user interfaces with HTML, CSS, JavaScript and frameworks such as React, Angular, or Vue; implementing server-side logic and APIs using Node.js, Python, Java, or Ruby; designing data schemas and managing databases (MySQL, PostgreSQL, MongoDB, etc.); integrating external APIs and services, including OpenAI APIs and payment gateways; performing unit, integration, and end-to-end testing; and optimizing performance across the stack. The role also involves building a highly flexible, scalable AI framework using toolsets like LangChain. Qualifications include strong proficiency in front-end technologies and at least one modern front-end framework, solid back-end development experience with languages such as C#, Java, Python, Node.js, Ruby, or PHP, experience with RESTful APIs, and familiarity with relational and NoSQL databases. Candidates should demonstrate debugging skills, the ability to write clean, maintainable code, and a willingness to learn new technologies. A Bachelor’s degree in Computer Science or related field (or equivalent practical experience) and experience wi

Rakuten International, a division of Rakuten Group, Inc., headquartered in San Mateo, California, is seeking an Early Career AI Engineer for an on-site contract position in the United States (San Mateo, CA or Bellevue, WA). The role supports the Rakuten AI User Experience team, building an innovative AI UX framework to serve as the AI core across Rakuten's products. Responsibilities include designing, building, and maintaining web applications with scalable front-end and back-end features; creating intuitive user interfaces with HTML, CSS, JavaScript and frameworks such as React, Angular, or Vue; implementing server-side logic and APIs using Node.js, Python, Java, or Ruby; designing data schemas and managing databases (MySQL, PostgreSQL, MongoDB, etc.); integrating external APIs and services, including OpenAI APIs and payment gateways; performing unit, integration, and end-to-end testing; and optimizing performance across the stack. The role also involves building a highly flexible, scalable AI framework using toolsets like LangChain. Qualifications include strong proficiency in front-end technologies and at least one modern front-end framework, solid back-end development experience with languages such as C#, Java, Python, Node.js, Ruby, or PHP, experience with RESTful APIs, and familiarity with relational and NoSQL databases. Candidates should demonstrate debugging skills, the ability to write clean, maintainable code, and a willingness to learn new technologies. A Bachelor’s degree in Computer Science or related field (or equivalent practical experience) and experience wi