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US Mobile

Principal Backend Engineer

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Description

  • We’re looking for an exceptional backend engineer and hands-on architect to help us scale and connect millions of devices to wireless networks. The projects and potential impact are incredible. We’re looking for talented, ambitious, and entrepreneurial team members who are excited to tackle these challenges
  • Architect optimal solutions to our business problems
  • Deploy exciting new features
  • Help us scale to scale to 10’s of millions of customers & connected devices
  • Build quality tools and frameworks to ensure a high-quality product
  • Build systems to ensure continuous uptime
  • Develop and maintain RESTful APIs using Java (Spring Boot or related web frameworks) or Python (Flask, Django)
  • Design and implement asynchronous service communication using RabbitMQ or AWS SQS/SNS
  • Work with NoSQL databases like MongoDB for data modeling and storage
  • Collaborate with Product, QA, and DevOps teams to deliver reliable and scalable features
  • Write clean, testable, and well-documented code with unit and integration tests
  • Participate in system architecture design, code reviews, and performance tuning

Benefits

  • Gym reimbursement
  • Free cellular service on the best network in the US
  • Free lunch in NYC office & fully stocked kitchen
  • Metrocard reimbursement
  • Flexible working hours
  • Strong communication and team collaboration skills
  • Demonstrated ability to incorporate AI tools into the software development lifecycle, using Claude or Opencode for tasks like automated code reviews, documentation generation, and improving system design efficiency
  • Solid understanding of Git, CI/CD workflows, and agile development practices
  • Hands-on experience with message brokers such as RabbitMQ or AWS SQS/SNS
  • Excellent problem-solving and debugging skills
  • Familiarity with MongoDB or other NoSQL database technologies
  • Strong experience with building and consuming REST APIs
  • 10+ years of experience with Java and Spring Boot
  • Experience integrating and leveraging AI-assisted development tools such as Claude and Opencode to accelerate backend development, including code generation, debugging, and optimization of APIs and services
  • Excellent debugging, problem-solving, and communication skills

Skills

What Principal Backend jobs ask for — and how much of it you have →
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See also

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