Senior Node.js Backend Engineer – APIs & Microservices

Quantum Technologies LLC; Menlo Park (CA); On-site; USD 140,000 - 230,000; Full time

Job summary

Quantum Technologies LLC is seeking a highly experienced Node.js Developer to design, develop, test, and maintain scalable backend applications and APIs. You will collaborate with frontend teams, product managers, and designers to deliver reliable software solutions.

The role requires strong expertise in Express.js, NestJS or Fastify, and a solid background in RESTful API design, databases, and security best practices. Expect exposure to modern cloud and CI/CD environments.

Qualifications

• Bachelor's degree in CS or related field or equivalent practical experience.

Responsibilities

• Develop and maintain scalable backend applications using Node.js.
• Design, build, and integrate RESTful APIs and/or GraphQL services.
• Work with databases such as PostgreSQL, MySQL, MongoDB, or Redis.
• Implement authentication, authorization, and data security best practices.
• Integrate third-party APIs and external services.
• Collaborate with frontend developers to ensure seamless application integration.
• Write unit, integration, and end-to-end tests.
• Troubleshoot, debug, and resolve application issues.
• Optimize application performance, scalability, and reliability.
• Participate in code reviews and contribute to technical decisions.
• Maintain technical documentation and development standards.
• Work with DevOps teams to support CI/CD pipelines and deployments.
• Stay current with emerging technologies and industry best practices.

Skills

RESTful API design

Node.js development

Asynchronous programming

Event-driven architecture

Automated testing

Git workflows

Communication skills

Problem solving

Agile methodologies

Frontend collaboration

Education

Bachelor's degree in Computer Science or related field

Equivalent practical experience

Tools

Express.js

NestJS

Fastify

PostgreSQL

MySQL

MongoDB

Redis

Git

Docker

Kubernetes

RabbitMQ

Kafka

AWS

JWT/OAuth

Job description

Quantum Technologies LLC is seeking a highly experienced Node.js Developer to design, develop, test, and maintain scalable backend applications and APIs. You will collaborate with frontend teams, product managers, and designers to deliver reliable software solutions.

The role requires strong expertise in Express.js, NestJS or Fastify, and a solid background in RESTful API design, databases, and security best practices. Expect exposure to modern cloud and CI/CD environments.