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Senior Javascript Developer Jobs in Toronto, ON (NOW HIRING)

Rumble - Career Page

Senior Back-End Developer

Toronto, ON · On-site

CA$135K - CA$154K/yr

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance ... Working knowledge of front-end technologies such as JavaScript or TypeScript, HTML, and CSS, along ...

Arteria AI

Senior Frontend Developer

Toronto, ON · On-site

CA$120K - CA$170K/yr

The Role We are hiring a Senior Frontend Developer to help build and evolve the web experience at ... You have deep expertise in React and TypeScript, on a strong foundation of core JavaScript. * You ...

Clio

Senior Software Developer (.NET)

Toronto, ON · Hybrid

CA$170K - CA$195K/yr

We are currently seeking a Senior Software Developer (.NET) to join our engineering team under Clio ... Work across the full stack: C#, SQL Server, JavaScript, HTML, CSS. * Collaborate with analysts ...

Rumble - Career Page

Senior Front-End Engineer

Toronto, ON · On-site +1

CA$150K - CA$179K/yr

Rumble is seeking a Senior Front-End Engineer to help evolve and scale the core web experiences ... A strong grasp of browser fundamentals, rendering models, and JavaScript internals is critical ...

AutoTrader.ca

Senior Software Engineer

Toronto, ON · Remote

You will contribute across a polyglot stack that includes PHP (Laravel), JavaScript, and TypeScript ... Champion DevOps best practices, CI/CD improvements, and observability standards * Identify and lead ...

Scotiabank

Senior Developer

Toronto, ON

Global Wealth Engineering Technology Team is looking for an energetic and results-oriented Senior ... Development experience in JavaScript(ES6+), React/Redux, ExpressJS and Jest/Mocha * Knowledge of ...

Hootsuite

Senior Salesforce Developer

Toronto, ON · Remote

In the role of Senior Salesforce Developer, you will play a pivotal role within the Business ... Development experience in HTML, CSS, Typescript, JavaScript * Experience with Jira, Agile ...

Rumble

Senior Back-End Developer

Toronto, ON

CA$135K - CA$154K/yr

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance ... Working knowledge of front-end technologies such as JavaScript or TypeScript, HTML, and CSS, along ...

Rumble

Senior Front-End Engineer

Toronto, ON · On-site +1

CA$150K - CA$179K/yr

Rumble is seeking a Senior Front-End Engineer to help evolve and scale the core web experiences ... A strong grasp of browser fundamentals, rendering models, and JavaScript internals is critical ...

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All JobsJavascript Developer JobsSenior Javascript Developer JobsSenior Javascript Developer Jobs in Toronto, ON

Senior Javascript Developer information

See Toronto, ON salary details

$63.9K

$117.8K

$174.2K

How much do senior javascript developer jobs pay per year?

As of Jul 25, 2026, the average yearly pay for senior javascript developer in Toronto, ON is $117,761.00, according to ZipRecruiter salary data. Most workers in this role earn between $98,297.00 and $132,176.00 per year, depending on experience, location, and employer.

What is a Senior Javascript Developer job?

A Senior JavaScript Developer is a highly experienced programmer specializing in JavaScript, including frameworks like React, Angular, or Node.js. They are responsible for designing, developing, and optimizing web applications, ensuring high performance and maintainability. Additionally, they provide technical leadership, mentor junior developers, and collaborate with cross-functional teams to deliver scalable solutions. Strong problem-solving skills, deep knowledge of JavaScript best practices, and experience with modern development tools are essential for this role.

What are typical challenges faced by Senior Javascript Developers in day-to-day work?

Senior Javascript Developers often encounter complex challenges such as optimizing web application performance, ensuring code scalability and maintainability, and integrating with diverse APIs and services. They are also expected to troubleshoot legacy code and address security vulnerabilities, all while keeping up with the rapidly evolving JavaScript ecosystem. Collaborating with designers, product managers, and junior developers can add layers of complexity to project requirements. However, overcoming these challenges is rewarding and provides opportunities to shape technical strategy and influence best practices within the team.

What are the key skills and qualifications needed to thrive in the Senior Javascript Developer position, and why are they important?

To thrive as a Senior Javascript Developer, a strong command of JavaScript (including ES6+), advanced front-end frameworks (like React, Angular, or Vue), and back-end technologies (such as Node.js) are essential, along with several years of professional coding experience. Familiarity with version control systems (like Git), CI/CD pipelines, and relevant certifications (e.g., AWS Certified Developer or JavaScript certifications) is highly valued. Excellent problem-solving abilities, mentorship skills, and effective communication help developers collaborate and lead within cross-functional teams. These skills enable Senior Javascript Developers to build robust applications, guide junior team members, and drive innovation in fast-paced tech environments.

What are the most commonly searched types of Javascript Developer jobs in Toronto, ON? The most popular types of Javascript Developer jobs in Toronto, ON are:
What are popular job titles related to Senior Javascript Developer jobs in Toronto, ON? For Senior Javascript Developer jobs in Toronto, ON, the most frequently searched job titles are:
What job categories do people searching Senior Javascript Developer jobs in Toronto, ON look for? The top searched job categories for Senior Javascript Developer jobs in Toronto, ON are:
Senior Javascript Developer jobs near you
Infographic showing various Senior Javascript Developer job openings in Toronto, ON as of July 2026, with employment types broken down into 83% Full Time, 5% Part Time, 1% Temporary, and 11% Contract. Highlights an 80% Physical, 7% Hybrid, and 13% Remote job distribution, with an average salary of $117,761 per year, or $56.6 per hour.

Senior Back-End Developer

Rumble - Career Page

Toronto, ON • On-site

CA$135K - CA$154K/yr

Other

Posted 8 days ago

Job description

Rumble is seeking a Senior Back-End Developer to design, build, and maintain high-performance server-side systems that power a large-scale video platform serving millions of users. This is a senior individual contributor role for someone who can own backend systems end to end, improve them in production, and make strong technical decisions as scale, complexity, and performance demands grow.

Our environment centers on backend services, data-intensive application logic, and production systems that must perform reliably at high scale. You should be comfortable working across PHP, MySQL, caching layers, APIs, Linux environments, and legacy systems, while also partnering effectively with front-end engineers to connect user-facing components to server-side logic.

You'll work closely with engineering partners to turn requirements into clear technical plans, apply strong systems design fundamentals to complex backend problems, and make sound implementation decisions across application, data, and infrastructure layers.

Responsibilities

Design and evolve scalable backend systems for a high-traffic video platform, with a focus on performance, maintainability, and long-term reliability. This includes building APIs, optimizing MySQL schemas and queries, implementing effective caching strategies with Memcached and Redis, and supporting background jobs or data-processing workloads that operate at significant scale.

The role also includes maintaining and modernizing legacy code, integrating front-end components with backend logic, and contributing to technical direction through code reviews, reusable patterns, and sound architectural judgment.

Qualifications
  • 8+ years of experience in back-end development, including strong experience building production systems at scale.
  • 10+ years of experience with object-oriented programming languages, including 5+ years working with PHP and modern PHP practices such as PHP 8+.
  • Strong experience with MySQL, including schema design, indexing, and query optimization, along with hands-on experience using caching systems such as Memcached and Redis.
  • In-depth understanding of web development fundamentals, HTTP protocols, and Linux server environments, including reading logs and troubleshooting production issues.
  • Working knowledge of front-end technologies such as JavaScript or TypeScript, HTML, and CSS, along with the willingness to jump into any project when needed.
Preferred Qualifications
  • Experience with video technologies, containers, codecs, or live streaming environments.
  • Experience with NGINX, WebSocket-based communication, BASH scripting, networking fundamentals, or static analysis tools such as PHPStan.
  • Degree in Computer Science, Engineering, or a related field.
  • Experience modernizing legacy PHP applications, working with server-side rendering architectures, or contributing to CI/CD and automated testing practices such as PHPUnit.

Note: The salary range listed for this position is a good faith estimate based on experience, qualifications, and internal compensation structure. The actual salary offered varies depending on the candidate's skill level and experience. This posting refers to an active vacancy within the organization.

Annual Compensation Range: 

$135,000 - $154,000 CAD base + benefits + equity 

Note: The salary range listed for this position is a good faith estimate based on experience, qualifications, and internal compensation structure. The actual salary offered varies depending on the candidate's skill level and experience. This posting refers to an active vacancy within the organization.

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