Ontario Junior python developer Jobs – 112 Openings This Week

Senior React Native Developer - Mississauga
Randstad —Mississauga, ON
- $74.83 an hour
- Temporary
- Hybrid work
- Azure
- Java
- AWS
Quick apply
19h
Senior Data Engineer
BMO Financial Group —Toronto, ON
- $75,900–$141,900 a year
- Full-time
- Azure
- Data analysis skills
- SQL
- Tuition reimbursement
- Life insurance
Associate Director, Payments Full Stack Developer (SWIFT)
Royal Bank of Canada —Toronto, ON
- Full-time
- Java
- Databases
- C++
8d
Senior Data Engineer
Samsara —Toronto, ON
- $119,000–$154,000 a year
- Remote
- Azure
- Oracle
- Computer Science
Software Analyst (SWAT), Senior
Hitachi Rail —Toronto, ON
- Full-time
- Hybrid work
- Microsoft Powerpoint
- Computer science
- Microsoft Excel
- Designated paid holidays
- Dental care
Senior Quality Assurance Engineer
NetBrain —Toronto, ON
- $82,000–$100,000 a year
- Computer Science
- Engineering
- English
- Dental care
Quick apply
Software Analyst (SWAT), Senior
Hitachi —Toronto, ON
- Full-time
- Microsoft Powerpoint
- Computer science
- Microsoft Excel
- Designated paid holidays
- Dental care
Senior Data Engineer
CanCap Management Inc. —Toronto, ON
- $130,000–$180,000 a year
- Full-time
- SQL
- Python
Quick apply
Senior QA Automation Lead (Java)
Citi —Toronto, ON
- $120,800–$170,800 a year
- Full-time
- Hybrid work
- Computer Science
- Java
- Master's degree
Senior Software Engineer, Konnect Core Platform
Kong —Toronto, ON
- $115,000–$200,000 a year
- Full-time
- Hybrid work
- Computer science
- Azure
- System design
10d
Senior Integration Engineer (Future oppourtunity)
GFL Environmental —Vaughan, ON
- DevOps
- Java
- Databases
Associate Director, Lead Quality Engineer
Royal Bank of Canada —Toronto, ON
- Full-time
- Computer Science
- DevOps
- Engineering
14d
Associate Director, Principal Data Engineer
Royal Bank of Canada —Toronto, ON
- Full-time
- Azure
- DevOps
- AWS
Senior kdb+ Engineer
Data Intellect —Toronto, ON
- Full-time
- Hybrid work
- Azure
- AWS
- Scripting
Quick apply
Senior Controls Developer
Steris —Stittsville, ON
- Full-time
- AutoCAD
- Schematics
- Customer service
- Designated paid holidays
Senior iOS Tooling Engineer
Lyft —Toronto, ON
- $136,000–$170,000 a year
- Hybrid work
- Project management
- In-person
- AI
- Commuter benefits
- Dental care
Senior Backend Engineer
ANVIL —Ontario
- $125,000–$165,000 a year
- Full-time
- Remote
- Computer science
- Azure
- Computer Science
Quick apply

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Senior Data Engineer
BMO Financial Group —Toronto, ON
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$75,900–$141,900 a year

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junior python developer jobs near ontario

Senior React Native Developer - Mississauga

Randstad -
Mississauga, ON

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Job details

Temporary
$74.83 an hour
19 hours ago

Qualifications

CI/CD
Kotlin
Azure
React
Firebase database
iOS
Objective-C
Git
Google Cloud Platform
Java
AWS
JavaScript
New Relic
REST
Redux
Scripting
Software development
APIs
A/B testing
GraphQL
Business requirements
Swift
TypeScript
Communication skills
Python
React Native
Debugging
Mobile testing

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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junior python developer jobs in ontario

Senior React Native Developer - Mississauga

Senior Data Engineer

Associate Director, Payments Full Stack Developer (SWIFT)

Senior Data Engineer

Software Analyst (SWAT), Senior

Senior Quality Assurance Engineer

Software Analyst (SWAT), Senior

Senior Data Engineer

Senior QA Automation Lead (Java)

Senior Software Engineer, Konnect Core Platform

Senior Integration Engineer (Future oppourtunity)

Associate Director, Lead Quality Engineer

Associate Director, Principal Data Engineer

Senior kdb+ Engineer

Senior Controls Developer

Senior iOS Tooling Engineer

Senior Backend Engineer

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