Toronto, On Senior javascript full stack developer Jobs – 93 Openings This Week

Senior React Native Developer - Mississauga
Randstad —Mississauga, ON
- $74.83 an hour
- Temporary
- Hybrid work
- Azure
- AWS
- Mentoring
Quick apply
3d
Apps Dev Tech Lead Analyst - C13 - MISSISSAUGA
Citi —Mississauga, ON
- $120,800–$170,800 a year
- Full-time
- Hybrid work
- Azure
- Master's degree
- AWS
12d
Senior Automation Developer
Citi —Mississauga, ON
- $94,300–$141,500 a year
- Full-time
- Hybrid work
- Computer Science
- Engineering
- Java
Transparency Pricing & Risk Developer
TD Bank —Toronto, ON
- $126,800–$164,100 a year
- Full-time
- Sales
- Java
- JavaScript
- Paid time off
Power BI Developer
CGI —Toronto, ON
- $65,000–$115,000 a year
- Full-time
- Hybrid work
- Computer Science
- Software troubleshooting
- Engineering
Quick apply
Senior Software Support Analyst
EllisDon Group —Mississauga, ON
- $90,000–$120,000 a year
- Full-time
- JavaScript
- APIs
- Python
Senior Software Developer 2, Artificial Intelligence
D2L —Toronto, ON
- $130,000–$160,000 a year
- Remote
- Computer science
- Azure
- Computer Science
- Tuition reimbursement
Quick apply
Principal Software Engineer - Platform, Identity and BI
Calabrio —Toronto, ON
- On call
- Remote
- DevOps
- Java
- SQL
- Designated paid holidays
- Disability insurance
Quick apply
Staff Back End Engineer (Applications)
Forma.ai —Toronto, ON
- Java
- Databases
- SQL
- Disability insurance
- Dental care
Quick apply
Senior AI Engineer, (Global Security)
Royal Bank of Canada —Toronto, ON
- Full-time
- Azure
- Research
- SQL
11d
Senior, Cloud Engineering
Scotiabank —Toronto, ON
- Azure
- Computer Science
- Engineering
- Tuition reimbursement
11d
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

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Senior React Native Developer - Mississauga
Randstad —Mississauga, ON
Bring your mobile engineering precision, clean code standards, and collaborative leadership style to our client's digital engineering team today!
$74.83 an hour
Quick apply
3d
Senior Software Engineer (Full-Stack JavaScript)
Morningstar —Toronto, ON
3+ years of professional software development experience, preferably with a focus on full-stack JavaScript or TypeScript.
$90,489–$132,711 a year
7d

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Director of IT
Cottage Dream Vacations —Whitby, ON
Bachelor’s degree in IT, Computer Science, Engineering, or related field. The Director of IT is responsible for the strategic leadership, architecture,…
$100,000–$110,000 a year
7d
Senior Full Stack Backend Engineer
TaliPay, Inc. —North York, ON
Keep up to date with industry trends and emerging technologies in backend development, sharing knowledge and proposing improvements to the team.
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Senior React Native Developer - Mississauga

Randstad -
Mississauga, ON

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Job details

Temporary
$74.83 an hour
3 days ago

Qualifications

Performance tuning
Kotlin
Software engineering
Automated build pipelines
Azure
Continuous Delivery (CD) implementation
iOS development
RESTful API
Firebase database
iOS
Jest
Git
Google Cloud Platform
Android
AWS
Flutter
New Relic
Back-end development
Mentoring
Redux
Scrum
A/B testing
GraphQL
Swift
Cross-functional collaboration
Android development
Software development or architecture experience
TypeScript
Communication skills
Python
React Native
Debugging
Cross-functional communication
Pipeline

Full job description

Our client, is seeking a high-performing Senior React Native Developer to join their core mobile engineering team.

In this high-impact consulting role, you will drive the evolution of customer-facing mobile applications that serve millions of Canadian shoppers every day. Leveraging your deep expertise in React Native, TypeScript, and mobile architecture, you will lead the development of new features, optimize app performance, and build scalable native integrations for both iOS and Android platforms. Working in a collaborative, cross-functional Agile environment, you will partner closely with product managers, UI/UX designers, QA engineers, and backend cloud teams to deliver high-quality code and maintain robust CI/CD deployment pipelines. This role is ideal for a senior mobile engineer who combines hands-on technical excellence with mentorship and software engineering best practices.

Duration: 2-Month Contract (with potential for extension)

Work Arrangement: Remote / Hybrid Options Available.

Advantages
High-Scale Enterprise Visibility: Build, optimize, and launch mobile application features directly used by millions of Canadians nationwide.

Modern Mobile Stack: Work across a modern engineering ecosystem featuring React Native, TypeScript, RESTful/GraphQL APIs, Firebase, and cloud backend integrations.

Cross-Platform & Native Hybrid Scope: Deepen your expertise bridging JavaScript/TypeScript with native iOS (Swift) and Android (Kotlin) modules.

Collaborative Tech Culture: Join an innovative, quality-focused engineering team that values continuous improvement, mentorship, and clean code standards.

Responsibilities
Feature Development & Native Engineering
Mobile Feature Leadership: Lead the design and end-to-end development of new features and performance enhancements across iOS and Android React Native applications.

Clean Code & Architecture: Write clean, reusable, maintainable, and well-tested TypeScript/JavaScript code following established software engineering design patterns.

Native Module Integration: Build and maintain native modules in Swift (iOS) and Kotlin (Android) as needed to integrate platform-specific features into the React Native framework.

API & Backend Integration: Connect mobile frontends with RESTful APIs, GraphQL endpoints, Firebase services, and enterprise cloud infrastructure.

Quality, CI/CD & Team Enablement
Performance & Optimization: Profile and optimize app responsiveness, memory utilization, render speeds, and asset consumption.

CI/CD Pipeline Maintenance: Implement, support, and maintain automated build and deployment pipelines for mobile releases using Git/Azure Repos and CI/CD tooling.

Code Quality & Mentorship: Conduct thorough peer code reviews, enforce coding standards, mentor junior developers, and foster engineering excellence.

Agile Collaboration: Participate actively in Scrum ceremonies, translating complex business requirements into clear technical designs and actionable user stories.

Qualifications
Software Engineering Experience: 6+ years of professional software development experience, with at least 4+ years dedicated to React Native delivering production applications at scale.

Core Programming Languages: High proficiency in JavaScript (ES6+) and TypeScript.

Mobile Architecture & State Management: Solid command of mobile architecture, state management frameworks (Redux, MobX, or Recoil), and navigation libraries (React Navigation).

Native Platform Literacy: Direct experience with native iOS (Swift / Objective-C) and/or Android (Kotlin / Java) development for platform-specific React Native integrations.

Tooling & CI/CD Pipelines: Hands-on experience with Git/Gitflow, Azure Repos, CI/CD deployment pipelines, and mobile build utilities.

Security & APIs: Strong understanding of RESTful API design, Firebase, and mobile security standards.

Testing & Quality Assurance: Familiarity with mobile testing frameworks such as Jest, Detox, or Appium.

Soft Skills: Exceptional problem-solving and debugging abilities; strong verbal and written communication skills with a proven track record of collaborating across cross-functional teams.

Preferred Assets & Nice-to-Haves
Experience with Python scripting or backend development.

Knowledge of GraphQL and Apollo Client integrations.

Experience with mobile analytics platforms, A/B testing frameworks, and feature flag management.

Familiarity with major cloud environments (GCP, AWS, or Azure) and mobile app observability platforms (e.g., New Relic).

Summary
If you are a tech-savvy Senior React Native Developer who pairs an absolute command of TypeScript, mobile architecture, and native iOS/Android module development with the CI/CD and performance optimization skills needed to power large-scale consumer applications, this 2-month contract is an outstanding opportunity. Bring your mobile engineering precision, clean code standards, and collaborative leadership style to our client's digital engineering team today!

Randstad Canada is committed to fostering a workforce reflective of all peoples of Canada. As a result, we are committed to developing and implementing strategies to increase the equity, diversity and inclusion within the workplace by examining our internal policies, practices, and systems throughout the entire lifecycle of our workforce, including its recruitment, retention and advancement for all employees. In addition to our deep commitment to respecting human rights, we are dedicated to positive actions to affect change to ensure everyone has full participation in the workforce free from any barriers, systemic or otherwise, especially equity-seeking groups who are usually underrepresented in Canada's workforce, including those who identify as women or non-binary/gender non-conforming; Indigenous or Aboriginal Peoples; persons with disabilities (visible or invisible) and; members of visible minorities, racialized groups and the LGBTQ2+ community.

Randstad Canada is committed to creating and maintaining an inclusive and accessible workplace for all its candidates and employees by supporting their accessibility and accommodation needs throughout the employment lifecycle. We ask that all job applications please identify any accommodation requirements by sending an email to [email protected] to ensure their ability to fully participate in the interview process.

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senior javascript full stack developer jobs in toronto, on

Senior React Native Developer - Mississauga

Apps Dev Tech Lead Analyst - C13 - MISSISSAUGA

Senior Automation Developer

Transparency Pricing & Risk Developer

Power BI Developer

Senior Software Support Analyst

Senior Software Developer 2, Artificial Intelligence

Principal Software Engineer - Platform, Identity and BI

Staff Back End Engineer (Applications)

Senior AI Engineer, (Global Security)

Senior, Cloud Engineering

Senior Full Stack Developer

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