Node Js Developer

Kumaran Systems; United States; A distancia; USD 120.000 - 180.000; Jornada completa

Descripción de la vacante

Kumaran Systems is seeking a Node.js Backend Developer with 4-7 years of experience to design, implement, and maintain secure, scalable backend services and RESTful APIs. You will work with MongoDB/Mongoose, implement JWT-based authentication, and collaborate with DevOps on CI/CD pipelines in a fully remote setup.

The role emphasizes modernizing legacy code, secure coding practices, and integrating with internal/external systems. Strong focus on performance, reliability, and data modeling.

Formación

• 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 OWASP vulnerabilities.
• 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.

Responsabilidades

• 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.

Conocimientos

Node.js

Express.js

MongoDB

JavaScript

JWT authentication

RESTful APIs

Herramientas

Mongoose

Jest

Git

Descripción del empleo

Role Overview

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, along with hands‑on experience in authentication, API integrations, and web security. This role involves building robust backend services, managing data models, and ensuring high application performance and reliability. The candidate will collaborate with cross‑functional teams and DevOps engineers to support CI/CD processes and deployment activities. Experience in modernizing legacy applications and following secure coding best practices is highly preferred.

Timing: 1:00 PM 10:00 PM IST

Work Mode: Remote

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.