Toronto, On Senior software developer (full stack javascript) Jobs – 84 Openings This Week

Senior Front-End Engineer
Rumble —Toronto, ON
- $150,000–$179,000 a year
- Continuous improvement
- AI
Quick apply
Senior Application Developer- Python (Global Security)
Royal Bank of Canada —Toronto, ON
- Full-time
- Azure
- Software troubleshooting
- System design
7d
AVP .NET Senior Developer
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Azure
- Oracle
- Computer Science
Senior Manager, Application Development and Integration
Royal Bank of Canada —Toronto, ON
- Full-time
- Azure
- Research
- Databases
5d
Senior Platform Engineer, Vice President
State Street —Toronto, ON
- Full-time
- Hybrid work
- Azure
- Engineering
- Maintenance
Senior AI Engineer, (Global Security)
Royal Bank of Canada —Toronto, ON
- Full-time
- Azure
- Research
- SQL
14d
Senior Full Stack Developer
Konrad —Toronto, ON
- $120,000–$145,000 a year
- Hybrid work
- Azure
- AWS
- JavaScript
- Work from home
- Flexible schedule
Quick apply
Senior Software Engineer, Content Cards
Braze —Toronto, ON
- $153,815–$308,400 a year
- System design
- JavaScript
- Organizational skills
- Dental care
- Paid time off
Quick apply
Senior Software Developer
OceanMD —Toronto, ON
- $120,000–$130,000 a year
- Full-time
- Hybrid work
- Java
- Mentoring
- Software development
- Flexible schedule
4h
Senior Software Engineer - QuantumBlack, AI by McKinsey
McKinsey & Company —Toronto, ON
- Azure
- English
- Java
21h
Senior Automation Developer - Assistant Vice President
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Computer Science
- Software troubleshooting
- Engineering
6h

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Senior Application Developer- Python (Global Security)
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7+ years of experience in software development or engineering, with a deep understanding of system design and architecture.
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Senior Cloud Security Developer (Global Security)
Royal Bank of Canada —Toronto, ON
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Senior Front-End Engineer
Rumble —Toronto, ON
Participate in code reviews, debugging, and continuous improvement of development practices, while helping elevate engineering standards across the team.
$150,000–$179,000 a year
Quick apply
Senior Software Developer
OceanMD —Toronto, ON
Working across the full software development lifecycle, you will combine hands-on development with solution design, technical leadership, and mentorship,…
$120,000–$130,000 a year
4h

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senior software developer (full stack javascript) jobs near toronto, on

Senior Front-End Engineer

Rumble -
Toronto, ON

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Job details

$150,000–$179,000 a year

Qualifications

Performance tuning
UI development
Git
PHP
Event-driven architecture
Continuous improvement
Webpack
REST
SEO
Angular
Front-end development
GraphQL
AI
TypeScript
Debugging

Full job description

About RUM Group Inc.

RUM Group Inc. is an AI infrastructure and video company. Its Quake AI business delivers AI compute as a service, operating AI data centers including GPU and CPU compute, storage, and networking at scale. Rumble, RUM Group's video business and the original tenant of Quake AI, provides creators and enterprises a full suite of video technologies, unlocking reach, scale, and monetization. RUM Group is building the rails of the agentic-first enterprise: the AI compute, cloud infrastructure, and trust layer for the agentic AI future, advancing RUM Group's mission to maximize the power of human imagination. For more information visit www.rum.group.

Rumble is seeking a Senior Front-End Engineer to help evolve and scale the core web experiences across our platform, including video pages, listings, and short-form content surfaces. This is a senior individual contributor role for someone who goes beyond framework usage and deeply understands how the web works under the hood. You'll play a key role in modernizing our front-end architecture as we continue migrating from legacy PHP-based systems toward a more component-driven approach using Lit and TypeScript.

This role sits on a small, highly collaborative team where engineers wear multiple hats and are expected to operate with a high degree of ownership. You should be comfortable taking ambiguous product requirements and turning them into clean, performant, and scalable implementations. A strong grasp of browser fundamentals, rendering models, and JavaScript internals is critical, along with the ability to reason about tradeoffs in tooling, bundling, and architecture.

You'll work closely with product, design, and backend teams to deliver performant, user-focused features while helping shape the future of our front-end stack. Success in this role requires both strong technical execution and the ability to engage in thoughtful technical discussions where ideas are challenged and refined collaboratively.

Responsibilities

Design, build, and maintain scalable front-end systems powering core Rumble experiences such as video playback pages, content listings, and short-form video features. Contribute to the ongoing migration from legacy PHP-rendered systems to modern web component-based architecture using Lit and TypeScript. Develop reusable, modular components with a focus on performance, maintainability, and cross-device compatibility. Work closely with design and product to break down ambiguous requirements into well-structured implementations. Optimize application performance across load time, rendering, and runtime efficiency. Collaborate on API integration across REST, GraphQL, and real-time data interfaces. Participate in code reviews, debugging, and continuous improvement of development practices, while helping elevate engineering standards across the team.

Qualifications

Strong front-end engineering experience with deep expertise in JavaScript and TypeScript, including closures, async behavior, and browser APIs.
Solid understanding of browser fundamentals, including DOM, Shadow DOM, rendering pipelines, and differences between virtual DOM and native approaches.
Experience working with modern front-end architectures and tooling, including bundlers (Webpack, Vite, Rollup), loaders, and build systems.
Hands-on experience with component-driven development, ideally with Lit or similar web component libraries; experience with Angular or vanilla JavaScript is preferred over framework-heavy abstraction.
Proven ability to translate design specifications into performant, maintainable UI implementations.
Experience integrating with APIs (REST, GraphQL, WebSockets) and handling dynamic data flows.
Strong debugging and problem-solving skills, with the ability to work across legacy and modern systems.
Comfort working in small, fast-moving teams with a high degree of ownership and ambiguity.
Experience with Git and modern development workflows.

Preferred Qualifications

Experience with Lit or web components and migrating from legacy front-end stacks.
Familiarity with server-rendered applications and hybrid rendering approaches.
Experience optimizing front-end performance at scale, including bundle size, rendering efficiency, and caching strategies.
Exposure to video technologies, streaming, or media-heavy applications.
Understanding of SEO best practices and technical implementation.
Experience working with real-time data and event-driven UI updates.
Ability to use AI-assisted development tools effectively while maintaining strong understanding of underlying systems and code quality.

Annual Compensation Range:

$150,000 - 179,000 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.

Why Our Team Loves Working Here:

We are making a significant financial impact for our video creator community; we're proud of their success stories
We enjoy challenging the status quo and going head-to-head against Big Tech
We aren't afraid to try new things; we act fast and want to win
We pay competitive salaries and provide great benefits

EEO Statement:
Rumble is an equal opportunity employer. We promote an equal playing field where everyone has the same opportunities regardless of race, religion, color, national origin, sex, sexual orientation, age, veteran status, disability status, or any other applicable characteristics protected by law. Rumble is an active participant in the e-verify program.

Physical demands of the position:
While performing the duties of this job, the employee is regularly required to sit for prolonged periods of time while using a computer and/or keyboard. The employee is required to communicate verbally and hear. The employee may be required to walk, reach with hands and arms, balance, and stoop or kneel. The employee may occasionally be required to lift and/or move up to 15 pounds. Specific vision abilities required by this job include clarity of vision at approximately 20 inches or less (i.e., working with small objects or reading small print), including the use of computers.

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senior software developer (full stack javascript) jobs in toronto, on

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