We are seeking a talented and experienced Senior Fullstack Engineer to join our Conversational AI (CXD) team. In this role, you will be responsible for designing, developing, and maintaining robust and scalable AI\-powered web applications with a strong focus on frontend development (60\-70%) while maintaining solid backend capabilities. You will work closely with product managers, designers, and other engineers to build next\-generation AI experiences including chat interfaces, LLM integrations, and intelligent user interactions. The ideal candidate will have deep JavaScript expertise, strong React ecosystem knowledge, experience with AI/LLM technologies, and a passion for building high\-quality, maintainable solutions that effectively integrate cutting\-edge AI capabilities.
*Responsibilities**
**AI Application Development**: Build AI\-powered chat applications, conversational interfaces, and intelligent user experiences
**Multi\-Agent Systems**: Design and implement complex AI workflows using, for example, LangGraph and multi\-agentic architectures
**LLM Observability**: Implement monitoring, logging, and performance tracking for AI/LLM integrations
**Frontend Development**: Design, develop, and maintain responsive web applications using React, Next.js, and TypeScript with deep JavaScript expertise
Database technologies (PostgreSQL, MongoDB, or MySQL)
RESTful APIs and GraphQL services
*AI/LLM Integration**
OpenAI APIs, LangChain, or similar frameworks
Streaming AI responses and error handling
Performance optimization for AI applications
Multi\-agent system implementation
*Development Practices \& Tools**
Modern testing frameworks (Jest, React Testing Library, Cypress)
Performance monitoring and debugging tools
Git version control and collaborative workflows
CI/CD pipelines and deployment automation
System architecture patterns and scalable application design
Security best practices including authentication flows and XSS prevention
*Performance \& Optimization**
Core Web Vitals optimization
Bundle analysis and rendering performance
Memory management and browser\-specific optimizations
Cross\-browser compatibility and debugging
*Mandatory Skills**
Python, React.js, Artificial Intelligence,
*Location**
Bangalore, Karnataka, India
*Years Of Exp**
5 to 8 years
*Why you should choose us?**
=============================
Are you interested in working for a Global Leader in E\-commerce? Are you excited about working on highly scalable platforms and applications that are accessed by millions of users every day? If so, read on to find out more about the opportunity.
Rakuten is the largest E\-commerce company in Japan and one of the largest E\-commerce and Internet Services companies in the World. Rakuten is ranked in top 20 most innovative companies in the world by Forbes.
Rakuten India Development Centre is the second largest technology hub outside of Japan that enables \& builds platforms for global E commerce, Payments, Digital, AI, Data Science services across the globe. The India arm serves as a research and development center with an employee strength of around 450\+ (\& Growing).
Rakuten is committed to cultivating and preserving a culture of inclusion and connectedness. We are able to grow and learn better together with a diverse team and inclusive workforce. The collective sum of the individual differences, life experiences, knowledge, innovation, self\-expression, and talent that our employees invest in their work represents not only part of our culture, but our reputation and Rakuten’s achievement as well. In recruiting for our team, we welcome the unique contributions that you can bring in terms of their education, opinions, culture, ethnicity, race, sex, gender identity and expression, nation of origin, age, languages spoken, veteran’s status, color, religion, disability, sexual orientation and beliefs”