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Senior Fullstack AI Engineer

Rakuten -
Bengaluru, Karnataka

Apply Now

Job details

6 days ago

Qualifications

BCS
CI/CD
Ant
Node.js
Law
Computer Science
React
Full-stack development
System architecture
Test automation
Git
MongoDB
Master's degree
Analysis skills
Express.js
Bachelor's degree
JavaScript
PostgreSQL
Continuous integration
Back-end development
REST
Redux
APIs
GraphQL
AI
TypeScript
Communication skills
Python
Debugging
MySQL

Full job description

Job Description

Senior Fullstack Engineer -

Job Summary

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
System Architecture: Make strategic technical decisions about AI application structure, data flow patterns, and scalability solutions
Performance Engineering: Optimize Core Web Vitals, bundle analysis, rendering performance, and AI response times for complex applications
API Integration: Develop and consume RESTful APIs, GraphQL services, and LLM APIs with proper error handling and state management
Technical Leadership: Conduct code reviews, mentor junior developers, and establish frontend development standards
Business Translation: Work with stakeholders to translate business requirements into technical solutions and feasibility assessments
Test Automation: Develop comprehensive automated unit, integration, and end-to-end tests
Production Support: Debug complex production issues, memory leaks, race conditions, and cross-browser inconsistencies
Security Implementation: Implement authentication flows, XSS prevention, data privacy and AI safety measures
Backend Development: Build and maintain Node.js/Express.js APIs, database integrations, and AI service orchestration

Requirements

Experience & Education

Bachelor's degree in Computer Science, Engineering, or related field
5-8 years of experience in fullstack development with frontend focus
Proven experience building chat applications and conversational interfaces
Experience integrating with AI/ML APIs and LLM frameworks
Strong analytical, problem-solving, and technical communication skills
Excellent collaboration abilities and experience working in cross-functional teams

Core Technical Expertise

Frontend Technologies

Advanced JavaScript (ES6+, closures, prototypes, async patterns, event loop, browser APIs)
React.js with hooks, context, and modern patterns
Next.js including SSR, SSG, and App Router
TypeScript with deep understanding of type system
Component libraries (Ant Design or Material-UI)
State management solutions (Redux, React Query)

Backend & Data

Node.js & Express.js for API development
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”

Apply Now

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