Senior Backend Developer

Are you ready to build high-performance backend services and own core APIs for a fast-scaling digital product ecosystem?

Location : Fort Lee, New Jersey ⏰ Work Mode : Full-time, office-based (Remote or hybrid not available)

The Role

As a Senior Backend Developer, you will be a key contributor within our platform engineering team. You’ll design, implement, and optimize high-performance Node.js APIs and microservices that power a global, fast-scaling product ecosystem. This role is ideal for a backend engineer who takes ownership of core services, drives performance and reliability, and wants to deepen technical impact in a fast-paced, hands-on environment.

What You’ll Do

• Develop, maintain, and scale robust backend services built with Node.js and Nest.js.
• Design and implement third-party API integrations and new platform modules from concept through deployment.
• Write clean, maintainable, and well-tested code following TDD principles.
• Work with SQL and NoSQL databases such as MongoDB, MySQL, and Redis to support high-volume data operations.
• Implement REST, GraphQL, and WebSocket communication protocols across services.
• Collaborate closely with frontend, DevOps, and product teams to deliver reliable and efficient solutions.
• Apply best practices for microservice architecture, scalability, and performance optimization.
• Participate in code reviews, architecture discussions, and continuous integration initiatives.

What We’re Looking For

• 5+ years of professional experience in web development.
• 3+ years of hands-on experience with Node.js, ideally with Nest.js.
• Deep knowledge of JavaScript (ES6+) and modern backend design patterns.
• Practical experience with high-volume databases, both SQL and NoSQL.
• Proficiency with Git and collaborative development workflows.
• Experience with message brokers such as RabbitMQ or Redis Pub/Sub.
• Solid understanding of TDD and experience writing automated unit and integration tests.
• Strong fundamentals in microservices architecture and distributed systems.

⭐ Nice to Have

• 2+ years of experience with CI/CD pipelines, containerization, and microservices deployment.
• Familiarity with Kubernetes or other container orchestration systems.
• Experience with the NATS messaging system.
• Hands-on experience with TypeScript and advanced Node.js tooling.

Why Join Smart State Inc.?

Bonuses : Discretionary, performance based Benefits : Comprehensive medical, dental, and vision + 401(k) Time Off : Generous PTO policy Perks : Partially subsidized in-office breakfasts and lunches Culture : Collaborative, international team that celebrates milestones and wins together Growth : Strong opportunities for professional development and ownership within a scaling organization

Salary range

$220,000 — $240,000 USD