Full Stack Developer

Katalyst CRO; Kondagunturu; On-site; INR 1,500,000 - 2,100,000; Full time

Job summary

Katalyst CRO is seeking an experienced Full Stack Developer (MERN) to design, build, and deploy AI-enabled applications. You will work across frontend, backend, and database layers, integrating LLMs, RAG, and AI APIs for production-grade solutions.

The role emphasizes secure, scalable software with CI/CD, Docker/Kubernetes, and cloud (AWS/GCP) deployments. 5+ years of hands-on experience and strong JavaScript/TypeScript skills are required.

Qualifications

• 5+ years of professional Full Stack development experience.
• Strong MERN proficiency: MongoDB, Express, React, Node.
• Advanced JavaScript and TypeScript skills.
• Experience integrating Generative AI/LLM APIs.
• Experience with AWS or GCP cloud platforms.
• Secure API development and modern software practices.

Responsibilities

• Design, develop, test, deploy, and maintain scalable web apps using MERN.
• Build reusable frontend components with React.js.
• Develop backend services, APIs, and logic with Node/Express/Nest.js.
• Create RESTful and GraphQL APIs; integrate third-party/enterprise services.
• Integrate LLMs and Generative AI APIs into apps and workflows.
• Develop AI-powered features: search, summarization, extraction, automation.
• Implement RAG with enterprise data and vector DBs; manage prompts.
• Ensure secure authentication, RBAC, API security; CI/CD and cloud deployment.

Skills

MERN stack

JavaScript

TypeScript

React.js

Node.js

Express.js

GraphQL

REST APIs

Microservices

AI integration

LLMs

RAG

Vector databases

AWS

GCP

Docker

Kubernetes

Git

CI/CD

Security

Testing

Tools

MongoDB

PostgreSQL

MySQL

Nest.js

GraphQL tooling

Docker

Kubernetes

Git

AWS

GCP

Job description

Overview

• We are seeking an experienced Full Stack Developer with strong expertise in the MERN stack (MongoDB, Express.js, React.js, and Node.js) to design, develop, and deploy scalable, cloud-based, AI-enabled applications.
• The ideal candidate will have strong full-stack development experience along with hands-on exposure to integrating Generative AI, Large Language Models (LLMs), AI APIs, Retrieval-Augmented Generation (RAG), semantic search, and intelligent automation into modern applications.
• This role is focused on building applications powered by AI, rather than developing or training AI/ML models from scratch. The developer will work across frontend, backend, databases, APIs, cloud infrastructure, and AI integrations to deliver secure, scalable, and production-ready applications.

Responsibilities

• Design, develop, test, deploy, and maintain scalable web applications using the MERN stack.
• Develop responsive and reusable frontend components using React.js.
• Build backend services, APIs, and application logic using Node.js, Express.js, and/or Nest.js.
• Design and develop RESTful and GraphQL APIs and integrate third-party and enterprise services.
• Integrate LLMs and Generative AI APIs into web and enterprise applications.
• Build AI-enabled features such as intelligent search, conversational interfaces, document processing, summarization, classification, information extraction, recommendations, and workflow automation.
• Develop Retrieval-Augmented Generation (RAG) solutions using enterprise data, documents, embeddings, semantic search, and vector databases.
• Implement prompt management, AI workflow orchestration, structured outputs, validation, and appropriate guardrails for AI-generated content.
• Design and optimize data models using MongoDB, PostgreSQL, and/or MySQL.
• Develop secure authentication, authorization, role-based access, and API security.
• Build reusable application components, services, integrations, and development frameworks.
• Optimize application performance, scalability, reliability, security, and AI service utilization.
• Implement application and AI workflow logging, monitoring, error handling, and observability.
• Develop unit, integration, API, and automated tests to ensure application quality.
• Participate in architecture discussions, technical design, code reviews, and development standards.
• Support CI/CD, Docker/containerization, and AWS/GCP cloud deployments.
• Collaborate with Product, UI/UX, QA, DevOps, and AI/ML teams throughout the development lifecycle.
• Evaluate emerging AI technologies and identify opportunities to incorporate them into applications.

Qualifications

• Around 5 or more years of professional Full Stack/Application Development experience.
• Strong hands-on expertise with MongoDB, Express.js, React.js, and Node.js (MERN).
• Strong proficiency in JavaScript and TypeScript.
• Strong frontend development experience with React.js.
• Strong backend development experience with Node.js and Express.js.
• Experience designing and developing RESTful APIs, GraphQL APIs, and microservices.
• Strong experience with MongoDB and exposure to relational databases such as PostgreSQL and MySQL.
• Hands-on experience integrating Generative AI/LLM APIs into applications.
• Understanding of LLMs, prompt engineering, RAG, embeddings, semantic search, and vector databases/vector search.
• Experience developing AI-powered features such as conversational interfaces, intelligent search, document processing, or workflow automation.
• Experience with AWS and/or Google Cloud Platform (GCP).
• Experience with Git, CI/CD, Docker, automated testing, and modern software development practices.
• Good understanding of application security, authentication, authorization, and secure API development.
• Strong analytical, debugging, and problem-solving skills.
• Ability to independently take ownership of features from design through production deployment.
• Experience with Nest.js, GraphQL, Angular, Ruby on Rails, Python, LangChain/LlamaIndex, vector databases, Kubernetes, or serverless technologies is a plus.