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Senior Backend Developer (Node.JS) SL

Sphere

Salary not specified
Sep 13, 2025
North Miami Beach, FL, US
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Sphere is looking to hire a Senior Backend Developer (Node.js) to contribute to the development of a high-volume customer engagement and workflow management platform that processes large-scale inbound leads from various digital and offline channels, classifies them, and manages them through custom business workflows.

Requirements

  • Strong expertise in Node.js (Express, NestJS, or similar frameworks).
  • Proficiency in designing and maintaining RESTful APIs.
  • Solid experience with databases (PostgreSQL preferred, MySQL or MongoDB also considered).
  • Familiarity with message queues (RabbitMQ, Kafka, or similar).
  • Experience with cloud platforms (AWS, GCP, or Azure).
  • Experience building workflow management or CRM-like platforms.
  • Familiarity with infrastructure as code (Terraform, Pulumi, etc.).

Responsibilities

  • Design, build, and maintain scalable backend services and APIs.
  • Develop features to process and manage large datasets, ensuring data integrity and security.
  • Collaborate with frontend developers, product managers, and other stakeholders to deliver high-quality solutions.
  • Optimize system performance to support high-throughput workflows.
  • Implement integrations with external systems and APIs.
  • Ensure compliance with best practices for security, availability, and maintainability.
  • Troubleshoot, debug, and resolve complex technical issues.

Other

  • Contract (approx. 165 hours)
  • Remote (must overlap with PST and be available until 5:30PM Chicago time)
  • Contribute to architectural discussions and provide technical leadership.
  • 5+ years of experience in backend development.