Job Description

About the Role
We are hiring an experienced

MERN Stack Developer

who can independently

build and scale full-stack applications

from scratch. The ideal candidate must have strong skills in

TypeScript

,

React.js

,

Node.js

,

Redux

, and

REST APIs

, along with a solid understanding of

microservices architecture

,

mobile API integrations

, and

responsive design

.
Experience with

LLMs

,

RAG architecture

,

Kafka

,

Redis

,

webhooks

, and database systems like

PostgreSQL

,

MySQL

, and

MongoDB

is essential. You'll be working on scalable systems, enterprise-grade platforms, and AI-integrated products.

Key Responsibilities

Develop and maintain full-stack web applications using React.js (with TypeScript) and Node.js (Express/NestJS) Build and document robust RESTful APIs and

mobile-ready endpoints

Implement and consume

webhooks

for third-party integrations and internal event-based workflows Ensure

responsive design

principles across devices and screen sizes Integrate with

mobile applications

via secure and scalable APIs Work with databases including PostgreSQL, MySQL, and MongoDB Integrate

Large Language Models (LLMs)

and

Retrieval-Augmented Generation (RAG)

pipelines Build and deploy microservices architecture using Kafka, Redis, Docker, etc. Manage application state using Redux or Redux Toolkit Write test cases using Mocha, Chai, Jest, or similar frameworks Participate in system design, architecture discussions, and scalability planning Follow Agile practices, perform code reviews, and contribute to CI/CD pipelines Collaborate with cross-functional teams including UI/UX, DevOps, QA, and Product Management
Required Skills & Experience

Minimum 4 years of hands-on experience with the MERN stack Strong proficiency in

TypeScript

,

React.js

,

Node.js

, and

Redux

Proven experience in building and consuming

REST APIs

and

webhooks

Deep knowledge of

responsive UI/UX

development Hands-on experience with

mobile-first API design

and integrations Strong knowledge of PostgreSQL, MySQL, and MongoDB Experience with

Kafka

,

Redis

,

Docker

, and

microservices

Exposure to

LLM

,

GPT

,

RAG

, or similar AI models Solid understanding of

software architecture

and ability to build systems from the ground up Working knowledge of

API security

,

JWT

,

OAuth

, and

rate-limiting

Familiar with test-driven development and QA practices Familiarity with Git, version control, and collaborative workflows
Good to Have

Experience with GraphQL and gRPC Experience in building SaaS or AI-integrated platforms Familiarity with ElasticSearch or RabbitMQ Experience with AWS, GCP, or Azure Understanding of serverless and event-driven architectures
Benefits

Competitive compensation with performance-based hikes Flexible remote or hybrid work options Opportunity to work on cutting-edge technologies including AI and scalable SaaS platforms Strong leadership and learning-driven environment Learning budget for courses, certifications, and conferences

Apply Now

on

Careers@Kayjayglobal.com

Job Type: Full-time

Pay: From ?15,000.00 per month

Benefits:

Provident Fund
Work Location: In person