Node.js Developer Needed for Scalable Backend API & Microservices Development

We're seeking a skilled Node.js Developer to architect, develop, and maintain backend systems and APIs for web and mobile applications.

The ideal candidate has strong experience with Node.js, Express.js, and MongoDB, understands microservices architecture, and can design performant, secure, and scalable solutions.

You'll collaborate with frontend developers, DevOps engineers, and QA teams to ensure seamless data flow and robust integration between services.

Key Responsibilities:

• Develop and maintain backend services using Node.js and Express.js

• Design and implement RESTful APIs and GraphQL endpoints

• Integrate databases such as MongoDB, PostgreSQL, or MySQL

• Implement authentication and authorization using JWT, OAuth2, or Passport.js

• Develop microservices for modular architecture

• Handle asynchronous processing using message queues (RabbitMQ, Kafka)

• Optimize server performance and response times

• Write clean, reusable, and well-documented code

• Implement error handling and logging (Winston, Morgan)

• Deploy applications on AWS / Azure / GCP

• Collaborate with frontend teams (React, Angular, Flutter)

• Participate in code reviews, unit testing, and continuous integration

Required Skills:

• 3+ years of hands-on experience in Node.js backend development

• Proficiency in JavaScript (ES6+) and TypeScript

• Strong understanding of Express.js, Nest.js, or Hapi.js

• Solid grasp of asynchronous programming, promises, and event loops

• Experience with MongoDB and Mongoose ORM

• RESTful API design and best practices

• Familiarity with GraphQL and Apollo Server

• Understanding of microservices and containerization (Docker)

• CI/CD pipeline implementation (GitHub Actions, Jenkins)

• Logging and monitoring tools (Winston, PM2, ELK stack)

• Unit and integration testing with Jest or Mocha

• Git version control and branching strategies

• Security best practices (rate limiting, input validation, HTTPS)

Backend Architecture Expertise:

1. RESTful API Design:

• CRUD endpoints for scalable APIs

• Proper HTTP status codes & headers

• Pagination, filtering, and sorting

• Middleware for validation and error handling

• Token-based authentication (JWT)

2. Microservices Architecture:

• Modular services communicating via APIs

• Load balancing and service discovery

• Message brokers (RabbitMQ, Kafka)

• API Gateway configuration (Nginx, Kong)

3. Database Management:

• MongoDB aggregation pipelines

• Data modeling and normalization

• Indexing and query optimization

• Backup and replication setup

• ORM/ODM: Mongoose, Sequelize, Prisma

4. Cloud & DevOps Integration:

• AWS EC2, Lambda, S3, and CloudWatch

• Docker containerization and deployment

• CI/CD with Jenkins or GitHub Actions

• Load testing and scaling with Kubernetes

Best Practices:

• Follow SOLID principles in backend design

• Use 12-Factor App methodology for microservices

• Maintain API versioning for backward compatibility

• Implement rate limiting and CORS policies

• Use dotenv (.env) for environment configuration

• Handle exceptions gracefully and log all critical events

• Write reusable utility modules

• Optimize for scalability and fault tolerance

Testing & Debugging:

• Unit testing (Jest / Mocha)

• Integration testing (Supertest)

• API documentation (Swagger / Postman Collections)

• Load testing (k6, JMeter)

• Error logging and performance profiling

Tools & Technologies:

• Languages: JavaScript (ES6+), TypeScript

• Frameworks: Express.js, Nest.js, Hapi.js

• Database: MongoDB, PostgreSQL, MySQL

• Caching: Redis, Memcached

• Testing: Jest, Mocha, Supertest

• DevOps: Docker, Kubernetes, Jenkins

• Cloud: AWS, Azure, GCP

• Version Control: Git, GitHub, GitLab

• Monitoring: PM2, ELK Stack, Datadog

• API Docs: Swagger, Postman

Performance Metrics & KPIs:

• API response time < 300ms

• Uptime ≥ 99.9%

• Code coverage ≥ 90%

• API latency consistency

• Database query optimization time

• Zero high-severity security vulnerabilities

Deliverables:

• Fully functional Node.js backend with documented APIs

• Secure authentication and authorization setup

• Integration with frontend and database systems

• CI/CD deployment pipelines

• Unit and integration testing reports

• Error handling and logging systems

• Dockerized environment for deployment

• Technical documentation (README, API Docs)

Compliance & Standards:

• OWASP Top 10 secure coding practices

• GDPR compliance for user data protection

• REST API design standards

• 12-Factor app deployment standards

• W3C and HTTP protocol compliance

Emerging Trends:

• Serverless backend (AWS Lambda, Firebase Functions)

• GraphQL APIs with Apollo Federation

• Edge computing deployment

• Event-driven architecture

• WebSockets for real-time data

• Node.js + AI integrations (LangChain, OpenAI API)

• Container orchestration with Kubernetes

Deliverables Recap:

✅ Scalable Node.js backend architecture

✅ Secure REST/GraphQL API endpoints

✅ Cloud deployment setup

✅ Testing & documentation reports

✅ Dockerized CI/CD ready project

Budget:

💰 $40 – $90/hour or $3,000 – $9,000 per project (depending on architecture complexity and integrations)

Timeline:

⏳ 4 – 10 weeks (depending on API scope, microservices count, and testing cycles)

This role is ideal for backend developers who love building resilient, high-speed APIs — combining logic, scalability, and security in every line of code. 🚀