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Senior Javascript Developer Jobs in Mississauga, ON

Financeit

Senior Developer 1 - Front End

Toronto, ON · On-site +1

CA$120K - CA$130K/yr

We are looking for an experienced Senior Front-End Software Developer to help us craft scalable ... Expert in HTML, CSS, JavaScript * Ability to implement responsive design and debug complex layout ...

Financeit

Senior Developer 1 - Front End

Toronto, ON · On-site

CA$120K - CA$130K/yr

We are looking for an experienced Senior Front-End Software Developer to help us craft scalable ... Expert in HTML, CSS, JavaScript * Ability to implement responsive design and debug complex layout ...

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 ...

ABL Employment

Senior Software Developer

Oakville, ON · On-site +1

CA$120K - CA$135K/yr

Our client is seeking an experienced Senior Software Developer (Full Stack) with 7+ years of ... with Node.js, C#, C++, JavaScript/TypeScript, HTML5, and Single Page Applications (SPA ...

TELUS

Senior Software Developer

Toronto, ON · On-site

... developers, business stakeholders, and senior leadership ... You have development experience with Python and/or JavaScript/Typescript * You keep up with the ...

Autodesk

Senior Software Developer, MCP/AI

Toronto, ON · On-site

As a Senior MCP/AI Developer, you will own agentic subsystems end-to-end - from problem ... Strong proficiency in TypeScript/JavaScript and modern web technologies (e.g. React) * Demonstrated ...

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 ...

CIBC US

Senior .NET Developer

Toronto, ON · Hybrid

As an Senior .NET Developer, you'll assemble, implement and maintain easy, flexible, and ... NET Core 8 +, C#, Oracle, JavaScript, Swagger, REST API, GIT, Linux, and Cloud/Containerization ...

Rumble

Senior Front-End Engineer

Toronto, ON

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 ...

Pagefreezer

Senior Software Developer (Remote)

Toronto, ON · Remote

CA$110K - CA$145K/yr

What You'll Do as a Senior Software Developer * Design & Scale Robust Architecture: Develop and ... Advanced proficiency in modern languages like Python and JavaScript/TypeScript, and specifically ...

Scotiabank

Senior Engineer, AI Native SDLC

Toronto, ON · On-site

CLIbased developer tooling (e.g., GitHub Copilot harnesses) * * Develop endtoend RAG systems ... Write highquality production code (TypeScript/JavaScript or Python) and contribute directly to ...

Geotab

Software Developer

Oakville, ON · On-site +1

Participate in a 24x7 on-call rotating schedule (if applicable), supported by senior team members ... Exposure to web development technologies (e.g., HTML, CSS, JavaScript, React). * Basic ...

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Senior Javascript Developer information

See Mississauga, ON salary details

$63.1K

$116.2K

$171.9K

How much do senior javascript developer jobs pay per year?

As of Aug 11, 2026, the average yearly pay for senior javascript developer in Mississauga, ON is $116,235.00, according to ZipRecruiter salary data. Most workers in this role earn between $97,023.00 and $130,463.00 per year, depending on experience, location, and employer.

What is a senior JavaScript developer?

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 as a senior JavaScript developer?

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 Mississauga, ON? The most popular types of Javascript Developer jobs in Mississauga, ON are:
What are popular job titles related to Senior Javascript Developer jobs in Mississauga, ON? For Senior Javascript Developer jobs in Mississauga, ON, the most frequently searched job titles are:
What cities near Mississauga, ON are hiring for Senior Javascript Developer jobs? Cities near Mississauga, ON with the most Senior Javascript Developer job openings:
Senior Javascript Developer jobs near you
Infographic showing various Senior Javascript Developer job openings in Mississauga, ON as of August 2026, with employment types broken down into 84% Full Time, 2% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution, with an average salary of $116,235 per year, or $55.9 per hour.

Senior Back-End Developer

Rumble - Career Page

Toronto, ON

CA$135K - CA$154K/yr

Full-time

Re-posted 24 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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