Toronto, On Core backend java developer Jobs – 94 Openings This Week

Senior React Native Developer - Mississauga
Randstad —Mississauga, ON
- $74.83 an hour
- Temporary
- Hybrid work
- Azure
- Java
- AWS
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1d
Senior Technology Architect - Toronto
Randstad —Toronto, ON
- $704.19–$737.20 a month
- Temporary
- Hybrid work
- Azure
- Computer Science
- DevOps
Quick apply
2d
Staff Developer, Customer Identity
Loblaw Digital —Toronto, ON
- $145,000–$195,000 a year
- Full-time
- Bar
- Azure
- Java
Senior Technology Architect (Contract)
EBF —Toronto, ON
- From $120 an hour
- Temporary
- Hybrid work
- Azure
- Computer Science
- DevOps
Quick apply
1d
Senior Quality Assurance Manager – QE Automation
Royal Bank of Canada —Toronto, ON
- Full-time
- Java
- APIs
- Leadership
Staff Back End Engineer (Data Platform)
Forma.ai —Toronto, ON
- Java
- Databases
- SQL
- Disability insurance
- Dental care
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Guidewire Automation Test Engineer
Cognizant —Toronto, ON
- $70,000–$90,000 a year
- Full-time
- Hybrid work
- Azure
- DevOps
- Java
8d
Staff Back End Engineer (Applications)
Forma.ai —Toronto, ON
- Java
- Databases
- SQL
- Disability insurance
- Dental care
Quick apply
Technical Lead
Fidelity Investments —Toronto, ON
- $135,000–$152,000 a year
- Full-time
- Computer Science
- Java
- Bachelor's
- Tuition reimbursement
- Paid time off
Senior Engineering Manager, Advanced Product Designer (APD)
Guidewire Software —Toronto, ON
- $148,000–$185,000 a year
- Full-time
- Hybrid work
- Computer Science
- Schematics
- DevOps
- Dental care
- Paid time off
Lead Security Engineer (Fraud)
US Mobile —Toronto, ON
- $150,000–$220,000 a year
- Hybrid work
- Computer Science
- DevOps
- Engineering
- Flexible schedule
Quick apply
SubLedger QE Strategy Lead
Royal Bank of Canada —Toronto, ON
- Full-time
- Oracle
- Management
- DevOps
Sr. Software Engineer, Backend
Pinterest —Toronto, ON
- Hybrid work
- Computer science
- Computer Science
- Java

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Senior Technology Architect - Toronto
Randstad —Toronto, ON
Agile Delivery Leadership: 10+ years of delivery experience within Scrum-based Agile teams, contributing to iterative development, technical guidance, and team…
$704.19–$737.20 a month
Quick apply
2d
B2B Sales Supervisor - AI Platform
TP Canada —Toronto, ON
In this leadership role, you will be accountable for the professional development and growth of Sales Executives supporting our AI Platform client within the…

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Senior Software Developer (Java)
OpenText —Richmond Hill, ON
The developer will have strong software development experience with a focus on backend systems and practical AI application development.
$98,080–$147,120 a year
Senior Java Developer
Bizinsys —Toronto, ON
Design, develop, and maintain Java based microservices. Implement RESTful APIs adhering to enterprise design standards. Must Have Technical/Functional Skills*.
$80,220.00–$120,000.82 a year
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core backend java developer jobs near toronto, on

Senior React Native Developer - Mississauga

Randstad -
Mississauga, ON

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Job details

Temporary
$74.83 an hour
1 day 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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core backend java developer jobs in toronto, on

Senior React Native Developer - Mississauga

Senior Technology Architect - Toronto

Staff Developer, Customer Identity

Senior Technology Architect (Contract)

Senior Quality Assurance Manager – QE Automation

Staff Back End Engineer (Data Platform)

Guidewire Automation Test Engineer

Staff Back End Engineer (Applications)

Technical Lead

Senior Engineering Manager, Advanced Product Designer (APD)

Lead Security Engineer (Fraud)

SubLedger QE Strategy Lead

Sr. Software Engineer, Backend

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