Job Description:

We are looking for an experienced Node.js developer to help us build scalable and high-performance web applications. The project involves developing robust back-end systems and APIs that will interact with a variety of front-end technologies.

As a Node.js developer, you will be responsible for creating the back-end services, integrating third-party services, and ensuring smooth data flow through our application. If you have strong expertise in JavaScript, Node.js, Express.js, and are passionate about building fast, scalable systems, this is the project for you.

Key Responsibilities:

• Backend Development: Build a scalable and maintainable back-end using Node.js and Express.js.

• API Development: Create RESTful APIs to integrate with various front-end technologies, mobile apps, and third-party services.

• Database Integration: Work with both SQL (PostgreSQL, MySQL) and NoSQL (MongoDB) databases to ensure efficient data storage and retrieval.

• Authentication & Authorization: Implement secure user authentication and authorization using technologies like JWT, OAuth, or Passport.js.

• Performance Optimization: Ensure high performance, low latency, and reliability of the application.

• Security: Implement best practices for security in API development, including data encryption, input validation, and protection against common vulnerabilities like SQL injection and XSS.

• Testing: Write unit tests and integration tests to ensure the application is stable and bug-free.

• Deployment & Monitoring: Deploy the application to cloud platforms like AWS, Heroku, or DigitalOcean and implement monitoring for performance and health.

• Collaboration: Work closely with the front-end team to ensure smooth integration of front-end and back-end functionality.

Required Skills and Experience:

• Proven experience with Node.js and Express.js (minimum 2-3 years).

• Strong understanding of JavaScript and ES6+ features.

• Expertise in API development (RESTful APIs).

• Experience with NoSQL databases (e.g., MongoDB) and SQL databases (e.g., MySQL, PostgreSQL).

• Familiarity with authentication and authorization systems (JWT, OAuth).

• Knowledge of version control (e.g., Git) and experience using platforms like GitHub or GitLab.

• Understanding of cloud services (AWS, DigitalOcean, Heroku) for deploying and scaling applications.

• Proficiency in unit testing and frameworks such as Mocha, Jest, or Chai.

• Experience in CI/CD pipelines and automated deployments.

Nice to Have:

• Knowledge of Docker and containerization for easy deployment.

• Experience with GraphQL or WebSocket.

• Familiarity with microservices architecture.

• Experience with AWS Lambda or serverless functions.

• Knowledge of front-end technologies (React, Vue.js) is a plus but not mandatory.

Budget:

$1,500 - $4,000 (Fixed Price, depending on scope)

Project Duration:

Estimated 6-8 weeks
Immediate start upon finalizing the candidate.

How to Apply:

Please provide the following in your application:

1. Portfolio or GitHub links to any Node.js projects you’ve worked on.

2. A brief overview of your experience with Node.js, Express, and API development.

3. Describe a challenging project you worked on with Node.js and how you solved the key problems.

4. Your estimated timeline to complete the project and key milestones (e.g., initial setup, API development, testing, etc.).

Screening Questions:

1. Can you provide links to Node.js projects you've developed or contributed to on GitHub?

2. How do you ensure that your Node.js applications are both scalable and performant?

3. Have you worked with authentication systems (e.g., JWT, OAuth)? If yes, can you provide examples?

4. How do you handle database optimization for large datasets in MongoDB or PostgreSQL?

Important Notes:

• We are looking for a long-term working relationship for future updates and additional features.

• Clear communication and adherence to timelines are critical to the project’s success.

• We expect regular progress updates and a collaborative approach to problem-solving.