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Senior Software Engineer, Email Team

Job in Toronto, Ontario, M5A, Canada
Listing for: OneSignal
Full Time position
Listed on 2026-02-28
Job specializations:
  • Software Development
    Software Engineer, Senior Developer, Full Stack Developer, Backend Developer
Salary/Wage Range or Industry Benchmark: 195000 - 225000 CAD Yearly CAD 195000.00 225000.00 YEAR
Job Description & How to Apply Below
Our blog contains more information about Engineering at One Signal.

About The Team:
The Email team at One Signal develops the UI and API powering our market-leading email services. This product-focused team builds out scalable solutions to complex problems such as campaign warmups, message personalization, and link tracking.

We’re continually improving our product to enhance our customers’ experience and empower them to create effective and impactful messaging campaigns. We move quickly to deliver value to our customers, while maintaining a high standard for reliability and functionality.

As a Senior Software Engineer, you'll be expected to take ownership of end-to-end projects that require developing in multiple languages across the stack. Your ability to consider performance characteristics, user experience, and maintainability of systems will be critical to success in this role. Your contributions will shape the way household brand names engage with their users. You will drive organizational proficiencies in key technologies and technical areas, such as scalable architecture and programming language expertise.

What You'll Do:

Collaborate with Product Managers, Designers, and Engineers to implement new features for our Customer Engagement products, using Type Script, Ruby, and Rust.

Conduct code and specification reviews, providing technical insights to improve our features and code base

Resolve production reliability issues and ensure the system scales to meet the demands of our customers

Refactor components on the frontend, creating extensible, reusable and clean component architecture

Stay up-to-date with the latest industry trends and technologies, incorporating new ideas into our engineering processes

Present technical specifications to other engineers, drive alignment on proposed solutions, and prototype draft implementations

What You'll Bring:

6+ years of professional software development experience

Experience creating extensible, reusable React components

Experience with Type Script and at least one system programming language (Rust, Go, Ruby, etc)

Ability to own and deliver end to end software functionality from design/architecture, through implementation, testing, production, release, and monitoring

Strong Usage of AI tooling or integrations

Ability to manage complex cross-team coordination and work closely with product owners

Familiarity with frontend code-testing tools like react-testing-library, cypress, and storybook

Ability to evaluate and communicate different engineering solutions and trade-offs

A strong willingness to learn new technologies rapidly

Experience designing RESTful and/or gRPC APIs

We value a variety of experiences, and these are not required. It would be an added bonus if you have experience in any of the following:

Experience working with backend distributed systems at scale

Experience with event streaming framework such as Apache Kafka

Experience working with analytics and observability tools like Mixpanel and Rollbar

Experience with Rust or another systems programming language

Experience with Kubernetes

Experience with data modeling using at least one database engine (MySQL, Postgre

SQL, Redis, Cassandra, Scylla

DB, etc.)

The base salary in Canada for a Senior Software Engineer full-time position is between CAD $195,000 and CAD $225,000. Your exact starting salary is determined by a number of factors such as your experience, skills, and qualifications. In addition to base salary, we also offer a competitive equity program and comprehensive and inclusive benefits.

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Position Requirements
10+ Years work experience
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