We are seeking a Node.js
Backend Developer with 4-7 years of experience to design, develop,
and maintain secure, scalable backend applications and RESTful APIs. The ideal
candidate will have strong expertise in Node.js, Express.js, MongoDB, and
JavaScript.
Key
Responsibilities
- Design, develop, and enhance backend services
using Node.js, JavaScript, and Express.js.
- Own the design and maintenance of secure,
scalable REST APIs and middleware.
- Model and manage data using MongoDB and
Mongoose (schemas, indexes, queries, transactions).
- Implement and maintain
authentication/authorization with JWT, secure cookies, sessions, roles,
and permissions.
- Enforce secure coding practices: validation,
error handling, logging, audit trails, and consistent API responses.
- Integrate with internal/external systems using
Axios/HTTP clients, TLS/SSL, and API gateways (e.g., Azure API
Management).
- Handle secure file upload/download flows (Busboy,
MongoDB GridFS) with proper validation and sanitization.
- Write and maintain unit and integration tests
using Jest; help improve test coverage and reliability.
- Collaborate with DevOps teams on CI/CD pipelines
(Jenkins, Git, Artifactory, SonarQube, Fortify, Black Duck).
- Incrementally refactor and modernize legacy code
while preserving business functionality.
Mandatory Technical Skills & Experience:
· Strong
hands-on experience with Node.js and modern asynchronous JavaScript (Promises,
async/await).
· Deep
experience with Express.js (routing, middleware, validation, centralized error
handling).
· Proven
track record building and consuming RESTful APIs in production environments.
· Practical,
hands-on experience with MongoDB and Mongoose.
· Experience
implementing JWT-based authentication and role-based access control.
· Good
understanding of web security: secure cookies, session management, CSRF, CORS,
token lifecycle, and common vulnerabilities (OWASP).
· Experience
integrating downstream APIs using Axios or similar HTTP clients.
· Experience
with TLS/SSL certificates, timeouts, resilience patterns, and troubleshooting
service-to-service communication.
· Experience
writing unit tests with Jest, including mocks and async test cases.
· Working
knowledge of Git workflows and CI/CD pipelines.
Kumaran Systems Tamil Nādu, IND Office
SIPCOT IT Park, Plot No.28/A-41, III Main Road, 6th Cross, , , Tamilnadu , India, 603 103,
Kumaran Systems Chennai, Tamil Nadu, IND Office
III Main Road, 6th Cross,SIPCOT IT Park, Siruseri, ,, Chennai, India, 603103
Kumaran Systems Chennai, Tamil Nadu, IND Office
8th Floor (Level 9), “ALTIUS C” Block, Olympia Technology park, SIDCO industrial Estate, Guindy, – , Chennai, India, 600032
