Posted 3 months ago
Principal Backend Engineer
@ US Mobile
Toronto, Ontario
Overview
US Mobile is hiring a Principal Backend Engineer to architect and scale backend systems connecting millions of devices to wireless networks. The role involves designing solutions, deploying features, and building tools for high uptime, with 10+ years of Java and Spring Boot experience required.
Pay:
$160,000–$220,000 a year
Responsibilities:
- Develop and maintain RESTful APIs in Java or Python
- Design asynchronous service communication with RabbitMQ or AWS SQS/SNS
- Model and store data in NoSQL databases like MongoDB
- Participate in system architecture design and performance tuning
- Collaborate with Product, QA and DevOps teams
Requirements summary:
- 10+ years of experience with Java and Spring Boot
- Strong experience building and consuming REST APIs
- Hands-on experience with RabbitMQ or AWS SQS/SNS
- Familiarity with MongoDB or other NoSQL databases
- Experience with AI-assisted development tools such as Claude or Opencode
Tools & skills
Benefits mentioned
Source and dates
Employer career site / ATS feed · lever
- Employer posting date
- 2026-08-21
- First seen by our source
- 2026-10-08
- Source record updated
- 2026-10-09
These dates describe the source record, not a live verification that the employer is still hiring. Check the original posting.
Job details
| Seniority | Lead |
| Department | Software development |
| Experience | 10+ years |
| Hours per week | 40 (estimated) |
| Travel | air: none · ground: none |
| Work setting | Office, Home |
| Position | Mostly sitting |
| Physical demands | physical low · computer high |
| Languages | English |
| Perks mentioned | Generous paid time off, Flexible hours, Wellness |
Summary and details written by AI from the posting; the employer’s posting is the authority.
US Mobile
Saved company profile
Historical company information from a saved The Jobs API profile (LinkedIn/Crunchbase fields). It is not live-verified; figures may have changed. Missing values remain unknown.
On a mission to revolutionize wireless by building the next-generation connectivity platform.
Full company description
At US Mobile, we’re on a mission to revolutionize wireless by building the next-generation connectivity platform. We are America's first Super Carrier, bringing lightspeed connection to our customers who are able to switch seamlessly between all three networks. Our goal is to connect the next billion wireless devices onto nationwide 4G and 5G networks, including your phone, drone, car, watch, pet tracker, and everything in between. We’re accomplishing this by leveraging cutting-edge technology and customer-focused UI/UX design. Whether it’s with our high-speed international roaming options, customizable perks, AI-facilitated plan savings, customizable plans, or real-time dashboards, we’re building the industry’s most exciting user experience. US Mobile’s 4G LTE network reaches more than 300 million Americans and includes international calling to over 200 countries and territories, but you will never hear from an operator at US Mobile. Our real, live Customer Support Representatives are available by phone or chat 24 hours a day, 7 days a week – to keep you connected, informed, and saving with US Mobile.
- LinkedIn followers
- 22,482
- People associated on LinkedIn
- 641
- Reported office locations
- 295 Madison Ave, New York, NY 10017, US
- Business categories
- Information Technology
- Telecommunications
- Wireless
- Mobile
- Wired Telecommunications
- Other recorded names
- US Mobile
- Specialties
- Telecommunications
- Mobile service
- and MVNO
- Profile identifies a recruitment agency
- No
- Reported total investment
- 11,499,999
Currency and observation date were not supplied; this is not a current valuation or a funding round.
At US Mobile, we’re on a mission to revolutionize wireless by building the next-generation connectivity platform. We are America's first Super Carrier, bringing lightspeed connection to our customers who are able to switch seamlessly between all three networks. Our goal is to connect the next billion wireless devices onto nationwide 4G and 5G networks, including your phone, drone, car, watch, pet tracker, and…
| Field | Value |
|---|---|
| Industry | Telecommunications |
| Company size | 51-200 employees |
| Headquarters | New York, NY |
| Organization type | Privately Held |
| Year founded | 2014 |
| Specialties | TelecommunicationsMobile serviceand MVNO |
| Open jobs on Jobsy | 7 |
| View page |
US Mobile is building the future of wireless communication. The goal: one unified network open to any person and any device, worldwide. Connection without walls.
We’re getting there by empowering customers. All three major networks on one phone and one plan, plus home internet from Starlink. No lock-in. No commitments. Custom fit plans at every price point. 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. It’s working — Consumer Reports named us the top-rated mobile carrier two years in a row.*
And we’re building innovative systems that scale. A network agnostic tech stack. Agile, cross-functional teams built on trust and mutual respect. This work isn’t for everyone. If you work fast, flexibly, and collaboratively — without compromising standards — we want to hear from you.
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.
You will:
- 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
Responsibilities:
- 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
Qualifications:
- 10+ 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
- Excellent debugging, problem-solving, and communication skills
- Excellent problem-solving and debugging skills
- Strong communication and team collaboration skills
Benefits:
- Health care coverage
- Flexible paid time off
- Gym reimbursement
- Free cell phone service
- Your choice of equipment + Bose QC/Apple Airpod Pro headphones
Think you're a good fit? Apply to learn more!
Journal
Only you can see this. Kept on this device, and in your account when you sign in.