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Added 27 days ago
Senior Java Developer Solution Architect - Vice President
Citi
Remote, Canada
Full-time · Remote
We’re seeking a seasoned Senior Java Developer Solution Architect with 6+ years of experience to lead end-to-end technical design and delivery of mission‑critical systems. You will own…
Added 5 months ago
Technical Lead
Fidelity Canada
Toronto, Ontario
Full-time
…first key mandates will be the modernization of Fidelity’s core systems, working alongside architecture partners to evolve legacy platforms toward more scalable, resilient, and future‑ready…
Added 4 months ago
Principal Architect, Software Engineering
Credera Experienced Hiring Job Board
Quinte West, Ontario
You have experience with one or more of the following programming languages: Java, .NET, Rust, client- and server-side JavaScript/TypeScript (React, Angular, Node.js), and Python
Added 20 days ago
Senior Software Engineer, Server Security
MongoDB
Toronto, ON
…Security team is a development-focused group within MongoDB's core engineering organization. Operating "close to the bottom of the stack," the team builds features that enable database…
Added 3 months ago
Senior C++ Application Developer
TMX Group
Toronto, Ontario
$120,000 to $130,000 CAD / year
Full-time
The ideal candidate is a well-rounded developer who enjoys using the right tool for the job - whether that’s writing Java or Python, managing SQL databases, or deploying projects to the…
Added 1 month ago
Specialist, AI Engineering
Definity Insurance Company
Toronto, ON
Full-time
…deploying cutting-edge AI solutions that will transform our core processes, including claims, underwriting, and customer engagement. You will be at the forefront of technological…
Added 11 days ago
Senior Full Stack Software Developer, RMJ
Redwood Software
ON
$132,000 to $165,000 CAD / year
As a Senior Full Stack Software Developer, you will be responsible for leading the design, development, and delivery of scalable full-stack applications, shaping system architecture, and…
Added 5 months ago
Lead Security Engineer (Fraud)
US Mobile
Montreal, Quebec
At the core of it all, we have a team and culture that has been recognized by Forbes as one of the top 500 best startup employers in the US. Our team spans diverse backgrounds, cultures,…
Added 1 month ago
Software Development Engineer II, ML Platform
Remitly
Burnaby, BC
Full-time
Develop and enhance core AI / ML platform offerings - including Feature Store, ML Orchestration, and Model Deployment & Serving - with a focus on performance, reliability, and usability.
Added 5 months ago
Java Backend Developer
Sapsol Technologies Inc
Remote, Canada
Full-time · Remote
Design, develop, and maintain backend services using Core Java and Spring Boot
Added 5 months ago
Java Full Stack Developer (Angular)
Sapsol Technologies Inc
Remote, Canada
Full-time · Remote
We are seeking a highly skilled Java Full Stack Developer with strong expertise in Angular (latest versions) and backend development using Java, Spring Boot, and Microservices architecture.…
Added 5 months ago
Java Full Stack Developer (React)
Sapsol Technologies Inc
Remote, Canada
Full-time · Remote
We are seeking a talented Java Full Stack Developer with strong expertise in backend development using Java, Spring Boot, and Microservices, along with frontend experience in React.js. The…
Added 27 days ago
Senior Java Developer - Assistant Vice President
Citi
Mississauga, ON
Full-time
We’re seeking a seasoned Senior Java Developer with 5+ years of experience to lead end-to-end technical design and delivery of mission‑critical systems. You will own architecture decisions,…
Added 27 days ago
Senior Java Developer - Assistant Vice President
Citi
Remote, Canada
Full-time · Remote
We’re seeking a seasoned Senior Java Developer with 5+ years of experience to lead end-to-end technical design and delivery of mission‑critical systems. You will own architecture decisions,…
Added 2 months ago
Senior Software Engineer, Full Stack
Brex
Vancouver, British Columbia
…build and scale the foundational infrastructure that powers core experiences across Brex. You will work across our extensive suite of platforms - including our multi-channel notifications…
Added 6 months ago
Senior Backend Engineer (Online Security)
US Mobile
Toronto, Ontario
Full-time
At the core of it all, we have a team and culture that has been recognized by Forbes as one of the top 500 best startup employers in the US. Our team spans diverse backgrounds, cultures,…
Added 20 days ago
Senior Software Engineer
Evismart
Vancouver, BC
Collocated squad model: core team on-site in Vancouver for rapid, focused iteration.
Added 1 month ago
Senior Software Developer
Broadridge
Vancouver, BC
Full-time
Broadridge Trading and Connectivity Solutions (BTCS), is seeking an experienced senior software developer in the Vancouver area join the NYFIX development team at Broadridge with 8 or more…
Added 10 days ago
Senior Associate, IT, Application Support Analyst (Core Banking)
MUFG Investor Services
Toronto, ON
$91,000 to $110,000 CAD / year
Full-time
Play a key role as part of a global support team covering the IT Core banking applications (Flexcube, FX Market Rates, Appian workflows, SWIFT, MUFG Automated Payment System, MUFG Global…
Added 6 months ago
Architect - Software Developer
Quantiphi
Fredericton, New Brunswick
Full-time
Quantiphi is seeking a seasoned Architect – Software Developer to lead the design and development of scalable, high-performance web applications. This role requires deep expertise in Java,…
Added 2 months ago
Staff Performance Engineer
Omnissa
Vancouver, British Columbia · British Columbia · Canada-British Columbia
$200,000 to $253,650 CAD / year
Full-time
At Omnissa, we’re driven by a shared mission to maximize value for our customers. Our five Core Values guide us: Act in Alignment, Build Trust, Foster Inclusiveness, Drive Efficiency, and…
Added 1 month ago
Senior Software Developer, Data Infrastructure
Autodesk
Toronto, ON · AMER - Canada - Ontario - Toronto - University Ave
Full-time
…developers. You will work on backend services, APIs, automation, and developer-facing capabilities that make DataOS easier to use, operate, and…
Added 1 month ago
Principal AI Software Developer
Autodesk
Toronto, ON · Montreal, QC · AMER - Canada - Ontario - Toronto - University Ave
Full-time
Write high-quality, secure, testable production code in Java, Python, Go, or similar languages.
Added 5 months ago
Principal Software Developer
Solace Corporation
Ottawa, ON
Full-time
This position is for a Principal Software Developer. In this role you will be a key technical leader working on the Solace Agent Mesh: an event-driven Integration and Orchestration Platform…
Added 6 months ago
Senior Mobile Developer | Développeur(euse) mobile senior
Jesta I.S.
Montreal, Quebec
Full-time
We are looking for a Senior Mobile Developer to join our Retail and Omnichannel development team. The ideal candidate will be responsible for developing and maintaining mobile applications…

US Mobile

Senior Backend Engineer (Online Security)

Toronto, ON, Canada

Pay: $130,000 - $190,000 a year
Job type: Full-time
Experience: 7+ years of experience with Java and Spring Boot
Posting language: English
Posted: Mar 24, 2026

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Original job description

US Mobile is on a mission to revolutionize connectivity. Imagine a world where you can go into a single app and buy terabytes of data for every one of your devices: phone, smart devices, car, home broadband, and more. That’s the future that US Mobile is building: a software platform built truly for the 21st century and the age of 5G and IoT, with world class engineering, best-in-class user experience, and features that will define the next generation of connectivity.

At the core of it all, we have a team and culture that has been recognized by Forbes as one of the top 500 best startup employers in the US. Our team spans diverse backgrounds, cultures, and stories, with employees coming from 20+ countries.

We're a venture-backed company entering hypergrowth, having recently ranked 94th on Inc 5000's fastest-growing private companies in America, and we’re looking for someone exceptional to join our team.

We’re looking for a skilled and motivated Senior Backend Engineer to help us scale connectivity to millions of devices, while keeping that platform secure from the ground up. In this role, you’ll design, develop, and maintain scalable backend services and APIs that power our products, with deep ownership over online security: protecting devices and networks, hardening authentication and access controls, and building systems that detect and respond to threats in real time.

You’ll work in a collaborative, agile environment and contribute to mission-critical systems that millions of users depend on every day.

\nKey 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:

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 comprehensive unit and integration tests
Participate in system architecture design, code reviews, and performance tuning

Nice to Haves:

7+ years of experience with Java and Spring Boot
Strong experience within Online Security, including:
- Protecting internet-connected devices, networks, and personal data from digital threats
- Authentication and Access management
- Software Protection
- Network Security
- Threat Detection
Strong experience building and consuming REST APIs at scale
Hands-on experience with message brokers such as RabbitMQ or AWS SQS/SNS
Familiarity with MongoDB or other NoSQL database technologies
Solid understanding of Git, CI/CD workflows, and agile development practices
Excellent debugging, problem-solving, and communication skills
Strong team collaboration instincts, you make the people around you better

Benefits:

Competitive salary (varies based on location)
Flexible working hours
Gym reimbursement ($100/mo)
Supplemental health insurance
Professional development stipend
$500 CAD wfh tech set-up reimbursement

$130,000 - $190,000 a year

Think you’d be a great fit? Apply to learn more!

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More about this job

Responsibilities

The role involves designing, developing, and maintaining scalable backend services and APIs, with a deep focus on online security, including protecting devices and networks, and hardening access controls. Responsibilities also include implementing asynchronous service communication and collaborating with cross-functional teams to deliver features.

Requirements

Candidates must be skilled in developing RESTful APIs using Java (Spring Boot) or Python (Flask, Django) and implementing asynchronous communication with tools like RabbitMQ or AWS SQS/SNS, alongside working with NoSQL databases such as MongoDB. Strong experience in online security, including threat detection and access management, is essential.

Skills

Java
Spring Boot
Python
Flask
Django
RabbitMQ
AWS SQS/SNS
MongoDB
NoSQL
RESTful APIs
Online Security
Authentication
Threat Detection
Git
CI/CD
Agile

Benefits

Competitive salary
Flexible working hours
Gym reimbursement
Supplemental health insurance
Professional development stipend
Wfh tech set-up reimbursement

Visa sponsorship

Not detected in the job text

Keywords

Backend Engineer
Online Security
Connectivity
5G
IoT
Backend Services
APIs
Authentication
Access Controls
Threat Detection
Java
Spring Boot
Python
Flask
Django
RabbitMQ
AWS SQS/SNS
MongoDB
NoSQL
Data Modeling
RESTful APIs
Unit Tests
Integration Tests
System Architecture
Code Reviews
Performance Tuning
Network Security
Agile
CI/CD

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