Node.js Developer job description

Job brief

We are seeking a highly skilled Node.js Developer to join our core engineering team and elevate our platform's backend infrastructure. You will take ownership of our high-traffic Node.js microservices, ensuring they remain performant, secure, and easily maintainable as we scale to support millions of daily users. You will work alongside frontend developers, data engineers, and product stakeholders to ship features that directly impact our user experience. If you are passionate about event-driven architecture and want to push the boundaries of server-side JavaScript, we would love to have you on the team.

What is a Node.js Developer?

A Node.js Developer is a specialized software engineer focused on architecting and maintaining server-side network applications using the Node.js runtime environment. By leveraging the V8 engine and an asynchronous, event-driven architecture, a Node.js Developer builds highly scalable microservices and real-time APIs that handle heavy concurrent traffic. Their expertise in JavaScript across the full stack allows them to bridge the gap between frontend interfaces and complex backend data processing, ensuring high availability and optimal system throughput.

What does a Node.js Developer do?

A Node.js Developer spends their day writing non-blocking, asynchronous code to build and refine robust RESTful or GraphQL APIs that serve frontend client applications. They frequently interact with databases like MongoDB or PostgreSQL, perform rigorous unit and integration testing using Jest or Mocha, and manage application deployment cycles via Docker containers and Kubernetes clusters. Beyond coding, they troubleshoot memory leaks or event-loop blocking issues and collaborate closely with DevOps engineers to refine CI/CD pipelines that streamline the path from development to production.

Key responsibilities

• Architect and maintain high-performance Node.js microservices that support real-time data processing and high-concurrency client requests.
• Design and implement secure RESTful and GraphQL APIs to facilitate seamless data exchange between the frontend and database layers.
• Optimize database schemas and write efficient queries for NoSQL databases like MongoDB or relational systems like PostgreSQL to reduce latency.
• Perform deep-dive performance tuning on the Node.js event loop to prevent blocking and ensure consistent system responsiveness under peak loads.
• Collaborate with DevOps teams to containerize Node.js applications using Docker and manage deployment orchestration through Kubernetes or AWS ECS.
• Conduct thorough code reviews and implement automated testing suites using Jest or Supertest to ensure high code quality and reliability.
• Integrate third-party services and payment gateways, managing secure authentication flows using JWT, OAuth2, or OpenID Connect protocols.
• Document system architecture, API specifications, and deployment workflows to maintain high knowledge-sharing standards across the engineering department.

Requirements and skills

• 3+ years of professional experience developing production-grade applications specifically within the Node.js and Express.js or NestJS ecosystem.
• Advanced proficiency in asynchronous JavaScript (ES6+), including deep understanding of closures, promises, async/await, and the event-loop.
• Proven experience designing and scaling microservices architecture deployed on cloud providers such as AWS, Google Cloud, or Azure.
• Hands-on expertise with database modeling in MongoDB, Redis, or PostgreSQL, including complex query optimization and index management.
• Experience implementing CI/CD pipelines using Jenkins, GitHub Actions, or GitLab CI to automate testing and production deployments.
• Solid understanding of cybersecurity best practices, including OWASP Top 10 mitigation, data encryption, and secure API design patterns.
• Bachelor’s degree in Computer Science, Software Engineering, or a relevant technical discipline, or equivalent industry experience.
• Ability to articulate technical trade-offs regarding system architecture and performance to non-technical product management stakeholders.

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