US Mobile is building the future of wireless communication. The goal: one unified network open to any person and any device, worldwide. We’re getting there by empowering customers. All three major networks on one phone and one plan, plus home internet from Starlink. 24/7 customer support with real people, empowered to help. We get real-time feedback from Reddit, surveys, and customer support informing product roadmaps and everything we do.
We’re building creative systems that scale. A network agnostic tech stack. Agile, cross‑functional teams built on trust and mutual respect. Help us scale to 10’s of millions of customers & connected devices
Build quality tools and frameworks to ensure a high‑quality product
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
7+ years of experience with Java and Spring Boot

- Strong experience with building and consuming REST APIs
- Hands‑on experience with message brokers such as RabbitMQ or AWS SQS/SNS
- Familiarity with MongoDB or other NoSQL database technologies
- 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
- 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
- Health care coverage

Flexible paid time off
Free cell phone service

📌 Senior Backend Engineer (Tech) (Montreal)
🏢 Us Mobile
📍 Montreal