Toronto, On Java + python backend developer Jobs – 91 Openings This Week

Senior React Native Developer - Mississauga
Randstad —Mississauga, ON
- $74.83 an hour
- Temporary
- Hybrid work
- Azure
- AWS
- Mentoring
Quick apply
4d
Full Stack Developer
Kumaran Systems —Toronto, ON
- Full-time
- SQL
- Analysis skills
- Machine learning
5h
CCaaS Engineer
Accenture —Toronto, ON
- $69,450–$119,450 a year
- Full-time
- Salesforce
- English
- Java
7d
API Quality Analyst (Quality Engineering) Lead
CGI —Toronto, ON
- $80,000–$130,000 a year
- Full-time
- Azure
- Software troubleshooting
- DevOps
Quick apply
Application Development Manager, Trading Platforms, Vice President
Citi —Mississauga, ON
- $120,800–$170,800 a year
- Full-time
- Hybrid work
- Oracle
- Management
- DevOps
Staff Back End Engineer (Applications)
Forma.ai —Toronto, ON
- Java
- Databases
- SQL
- Disability insurance
- Dental care
Quick apply
Senior Frontend Engineer
Forma.ai —Toronto, ON
- $150,000–$190,000 a year
- Java
- AWS
- JavaScript
- Disability insurance
- Dental care
Quick apply
Staff Back End Engineer (Data Platform)
Forma.ai —Toronto, ON
- Java
- Databases
- SQL
- Disability insurance
- Dental care
Quick apply
Staff Frontend Engineer
Forma.ai —Toronto, ON
- Java
- AWS
- JavaScript
- Disability insurance
- Dental care
Quick apply
Lead Agentic AI Engineer – VP (Mississauga)
Citi —Mississauga, ON
- $120,800–$170,800 a year
- Full-time
- Hybrid work
- Azure
- Oracle
- Java
Azure Cloud and AI Lead - 69858401
Cognizant —Toronto, ON
- $83,500–$95,500 a year
- Full-time
- Hybrid work
- Azure
- Software troubleshooting
- Java
- Employee stock purchase plan
- Designated paid holidays
9d
Staff Product Security Engineer, Reviews
Okta —Toronto, ON
- $180,000–$247,500 a year
- Hybrid work
- Java
- C++
- Communication skills
Quick apply
Associate Director, Lead Quality Engineer
Royal Bank of Canada —Toronto, ON
- Full-time
- Computer Science
- Software troubleshooting
- DevOps
SubLedger QE Strategy Lead
Royal Bank of Canada —Toronto, ON
- Full-time
- Oracle
- DevOps
- Engineering
Lead Engineer – AIRI
eBay Inc. —Toronto, ON
- Full-time
- System design
- Java
- C++
Senior Quality Assurance Manager – QE Automation
Royal Bank of Canada —Toronto, ON
- Full-time
- Java
- Team management
- Mentoring
Sr. Software Engineer, Backend
Pinterest —Toronto, ON
- Hybrid work
- Computer science
- Computer Science
- Java

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Backend Engineer – Python (API & Platform Engineering)
High Tech Genesis —Toronto, ON
Bachelor's or Master's degree in Computer Science, Engineering, or a related field. We are looking for an experienced Backend Engineer to develop scalable…
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Staff Software Engineer – Backend (Typescript / .Nodejs / AWS )
Varicent —Toronto, ON
Partner with senior engineers, architects, DevOps, and QA throughout the full development lifecycle. Tuition Assistance— Invest in your growth with support for…
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Full Stack Developer
Kumaran Systems —Toronto, ON
With over 34 years of delivery excellence, we specialise in re-engineering core applications, driving cloud transformation, and building automation-first, GenAI…
5h

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java + python backend developer jobs near toronto, on

Senior React Native Developer - Mississauga

Randstad -
Mississauga, ON

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Job details

Temporary
$74.83 an hour
4 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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Refine Your Search

java + python backend developer jobs in toronto, on

Senior React Native Developer - Mississauga

Full Stack Developer

CCaaS Engineer

API Quality Analyst (Quality Engineering) Lead

Application Development Manager, Trading Platforms, Vice President

Staff Back End Engineer (Applications)

Senior Frontend Engineer

Staff Back End Engineer (Data Platform)

Staff Frontend Engineer

Lead Agentic AI Engineer – VP (Mississauga)

Azure Cloud and AI Lead - 69858401

Staff Product Security Engineer, Reviews

Associate Director, Lead Quality Engineer

SubLedger QE Strategy Lead

Lead Engineer – AIRI

Senior Quality Assurance Manager – QE Automation

Sr. Software Engineer, Backend

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