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Contract Back End Developer Jobs in Toronto, ON (NOW HIRING)

Purolator

Technology Developer

Mississauga, ON

Description We are seeking a hands-on senior software engineer who can solve complex backend and ... Write and maintain automated unit, integration, contract, API and end-to-end tests while promoting ...

Geotab

Software Developer

Oakville, ON · On-site

Mid-morning you might drop into a backend slice: a Go service endpoint or a Python data pipeline ... API contract decision. Afternoons often involve a code review - either giving feedback to a ...

YO AI Labs

Software Engineer - Remote

Toronto, ON · Remote

Contract Location: Remote Job Summary: We are looking for experienced software engineers to help ... Work on challenging software engineering tasks across backend, full-stack, infrastructure, and ...

THOMSON REUTERS

Staff Software Engineer

Toronto, ON · Hybrid

This role is backend-leaning - you'll spend most of your time on server-side architecture, data ... Take ownership in developer experience by improving/automating CI/CD and other day to day ...

Collabera Canada Inc

Be Seen First

Senior Java Engineer (React)

Toronto, ON · On-site

CA$70 - CA$120/hr

Senior Java Engineer Type: 6-month contract + opportunity to extend Location: 1 Queen Street East ... Design, develop, and maintain backend services using Java and Spring Boot. * Contribute to ...

Solink

Senior Full-Stack Engineer (Media Team)

Toronto, ON · Remote

CA$115K - CA$173K/yr

This role is ideal for a senior backend or full-stack engineer who thinks in terms of throughput ... Design and evolve media platform APIs and contracts for multiple internal, as well as external ...

CorGTA

Senior Power Platform Developer

Toronto, ON · Hybrid

CA$100/hr

Fixed-Term Contract (12 Years) Compensation: Approximately $100/hr -- We have a great new ... Implement validation processes before data is pushed to backend systems * Support and enhance a ...

United Airlines

.NET Developer

Toronto, ON

Design and develop scalable backend services using .NET 6/7/8 and ASP.NET Core Build and maintain ... OAuth 2.0, OpenID Connect, JWT, and API Gateway patterns Write unit, integration, and contract ...

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All JobsContract Back End Developer JobsContract Back End Developer Jobs in Toronto, ON

Contract Back End Developer information

What is the difference between Contract Back End Developer vs Contract Front End Developer?

AspectContract Back End DeveloperContract Front End Developer
Required SkillsServer-side languages (e.g., Java, Python), databases, API developmentHTML, CSS, JavaScript, UI frameworks
Work EnvironmentBackend systems, server management, database integrationClient-side interfaces, user experience design
Common CertificationsNone specific, but backend certifications (e.g., AWS, Oracle) are commonNone specific, but front end certifications (e.g., React, Angular) are common

Contract Back End Developers focus on server-side logic, databases, and API development, while Contract Front End Developers work on user interfaces and client-side functionality. Both roles require technical skills but differ in their focus areas within software development.

What are some common challenges faced by contract back end developers when integrating with existing systems?

Contract back end developers often encounter challenges such as limited documentation, legacy codebases, and varying technology stacks when integrating with existing systems. Navigating these complexities requires strong problem-solving skills and the ability to quickly understand unfamiliar architectures. Effective communication with internal teams is crucial to clarify requirements and ensure seamless integration, especially within tight project timelines. Adaptability and proactive collaboration can help overcome these hurdles and deliver robust solutions.

How much do contract back end developers get paid?

Contract back end developers typically earn between $40 and $150 per hour, depending on experience, location, and project complexity. Senior developers with specialized skills in languages like Java, Python, or Node.js tend to command higher rates, especially for short-term or high-demand projects.

What are the key skills and qualifications needed to thrive as a contract back end developer?

To thrive as a Contract Back End Developer, you need strong skills in server-side programming languages (such as Node.js, Python, or Java), database management, and API development, often supported by a relevant degree or equivalent experience. Familiarity with version control systems like Git, cloud platforms (e.g., AWS, Azure), and containerization tools such as Docker is typically required. Excellent problem-solving, communication, and time management skills help you collaborate effectively and deliver quality work on tight schedules. These skills ensure you can build scalable, reliable back end systems that meet client requirements and project deadlines.

What is a contract back end developer?

Contract Back End Developers are software professionals who specialize in building and maintaining the server-side components of web applications on a contractual basis. They focus on databases, server logic, APIs, and integration with front-end systems to ensure smooth functionality and performance. Unlike full-time employees, contract developers are typically hired for specific projects or time frames, offering flexibility to both the developer and the employer. They often work with languages like Java, Python, Node.js, or Ruby and must be adept at collaborating with front-end teams and stakeholders.

Is a contract back end developer in demand?

Contract back end developers are in demand due to the ongoing need for software development, especially in industries adopting cloud computing and microservices architectures. Skills in programming languages like Java, Python, or Node.js, along with experience in APIs and databases, increase employability in this flexible work arrangement.

What are the most commonly searched types of Back End Developer jobs in Toronto, ON?

The most popular types of Back End Developer jobs in Toronto, ON are:

What are popular job titles related to Contract Back End Developer jobs in Toronto, ON?

For Contract Back End Developer jobs in Toronto, ON, the most frequently searched job titles are:

What job categories do people searching Contract Back End Developer jobs in Toronto, ON look for?

The top searched job categories for Contract Back End Developer jobs in Toronto, ON are:

Contract Back End Developer jobs near you
Infographic showing various Contract Back End Developer job openings in Toronto, ON as of August 2026, with employment types broken down into 67% Full Time, and 33% Contract. Highlights an 22% In-person, and 78% Remote job distribution.

Technology Developer

Purolator

Mississauga, ON

Full-time

Posted 27 days ago

Job description

 It's not a package. It's a promise.

As Canada's leading integrated freight, package, and logistics provider, we've been helping promises get where they need to be for more than 60 years. How does the magic happen? The journey starts with you. The places we go, the elements we brave, the promises we deliver - it's all possible because of our people. So, whether you're looking to build new skills, make an impact in your community, or inspire your team, we go there for you.

Location of Work

This role follows a full-time hybrid work arrangement. Work is generally performed at Purolator facilities on Meadowpine Boulevard in Mississauga.

Description

We are seeking a hands-on senior software engineer who can solve complex backend and cloud challenges while contributing across the full stack. The successful candidate will take ownership from technical design through production deployment, work on high-volume customer-facing applications, mentor developers and help shape technical direction.

About the Team

Purolator Digital Channels is part of Purolator's IT organization and is responsible for developing and engineering customer-facing applications. Our goal is to deliver reliable, scalable digital solutions that support Purolator's position as Canada's leading freight, parcel and logistics provider.

Responsibilities
  • Lead technical design and solution discussions for medium-to-large initiatives, translating functional requirements into secure, scalable and maintainable designs.
  • Develop and maintain APIs, event-driven services, cloud functions and web application features using Java, Python, Angular and AWS.
  • Design and support serverless and distributed architectures using services such as AWS Lambda, API Gateway, SQS, SNS, S3, DynamoDB and Aurora PostgreSQL.
  • Build and maintain CI/CD pipelines, contribute to cloud architecture decisions and support controlled production deployments.
  • Write and maintain automated unit, integration, contract, API and end-to-end tests while promoting TDD and BDD practices.
  • Perform code reviews, improve code quality, reduce technical debt and maintain strong automated test coverage.
  • Troubleshoot production issues, monitor application health and performance, and use logs, metrics and tracing to identify root causes.
  • Identify and remediate software vulnerabilities, upgrade dependencies and apply secure coding practices aligned with OWASP guidance.
  • Optimize application performance, database queries and cloud costs without compromising reliability or maintainability.
  • Collaborate with Product Owners, QA, architects and other stakeholders throughout development, testing, UAT and release activities.
  • Prepare clear technical documentation, including solution designs, component designs, deployment information and operational guidance.
  • Mentor junior and intermediate developers, share knowledge and promote consistent engineering standards across the team.
  • Use AI-assisted development tools responsibly to improve productivity, code quality, testing and documentation.
Experience

Backend Development

  • 7+ years of experience building and supporting enterprise applications in cloud environments.
  • Strong Java and Spring Boot development experience, including REST APIs, Maven, JSON and service integration.
  • Practical Python experience, including AWS Lambda development, boto3 and pytest.

Frontend Development

  • Hands-on experience with Angular, TypeScript, HTML and CSS.

AWS and Cloud Engineering

  • Proven experience with AWS Lambda, API Gateway, SQS, SNS, S3, CloudWatch, IAM, DynamoDB and Aurora PostgreSQL.
  • Experience designing, deploying, monitoring and troubleshooting production cloud applications.
  • Experience with infrastructure as code, preferably AWS CloudFormation.

Data and Integration

  • Strong PostgreSQL and SQL skills, including data modelling, indexing and query performance tuning.
  • Experience with DynamoDB and integrating REST or SOAP services.

Testing and Delivery

  • Experience with JUnit 5, Mockito, pytest, Postman and REST Assured or equivalent testing tools.
  • Solid understanding of unit, integration, contract and API testing, automated testing, mocking, TDD and BDD.
  • Experience with GitHub Actions or a comparable CI/CD platform.

Leadership and Collaboration

  •  Ability to lead technical discussions, review designs and code, mentor developers and communicate effectively with both technical and non-technical stakeholders.
  • Strong ownership, problem-solving and debugging skills, with the ability to work independently and manage changing priorities.
Preferred Qualifications

The ideal candidate enjoys solving complex technical problems, takes ownership from design through production and is committed to clean, maintainable and well-tested software. They are comfortable working across Java, Python, Angular and AWS; mentoring teammates; improving engineering practices; and balancing delivery speed with quality, security and operational reliability.

  • Experience with CloudWatch Insights, AWS X-Ray, Security Hub, EventBridge, Step Functions, ECS/Fargate or CloudFront.
  • Experience with SonarCloud, OpenAPI/Swagger, microservices and observability practices.
  • Experience with application or product feature design and high-volume customer-facing systems.
  • Experience using GitHub Copilot, ChatGPT, Claude or similar AI-assisted development tools in a professional software engineering environment.

Language Requirement: Proficiency in English is required for this position due to the frequent communications that must be conducted in English with various stakeholders. This requirement is justified by the nature of the responsibilities and operational needs.

POSTING DETAILS
Location:                    530 - Corporate  
Working Conditions: Office Environment 

Reports to:   Lead Technology Developer 
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Purolator is an equal opportunity employer committed to diversity and inclusion. We welcome all qualified applicants and provide accommodations during the recruitment process upon request.

Purolator complies with Canadian law in all recruitment practices. During pre-screening, we may use an Artificial Intelligence (AI) tool, supported by human oversight, to efficiently manage tasks such as resume screening and candidate matching, enabling our team to connect with qualified candidates faster.

Personal information is used solely for recruitment and managed in accordance with privacy legislation. For AI-related inquiries only, contact TalentCOE@purolator.com. To apply, visit our Careers Page.

We recognize that employees and their families are essential to our success. We strive to provide a safe, healthy, and supportive workplace, ensuring the right people have the tools they need to thrive.

Every day at Purolator is an opportunity to connect with colleagues, customers, and communities to make a positive impact. Learn more about our values at www.purolator.com.

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