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Senior Software Developer Jobs in Ontario (NOW HIRING)

BMO Capital Markets

Senior Software Developer

Toronto, ON · On-site

CA$75K - CA$141K/yr

Applies deep knowledge of algorithms, data structures and programming languages to develop high quality technology applications and services - including tools, standards, and relevant software ...

StackandCo

... 2 senior developers of e\-commerce solutions for our client using Magento, CloudSense and MuleSoft integration. In relation to Magento there is possibly flexibility to consider Developers with PHP ...

StackandCo

... 2 senior developers of e\-commerce solutions for our client using Magento, CloudSense and MuleSoft integration. In relation to Magento there is possibly flexibility to consider Developers with PHP ...

Autodesk

Senior Software Developer

Toronto, ON

CA$107K - CA$157K/yr

Bachelor in Computer Engineering with5+ years working experience or equivalent MS. * Comprehensive technical knowledge and experience in software development methodologies, design, implementation ...

Warnerbros

Senior Software Developer

Kanata, ON · Hybrid

Code! Be passionate about software engineering with a strong sense of ownership for the code that you and your team write. * Support others on your team through code reviews, pairing and ...

Propel Holdings

Sr. Software Developer

Toronto, ON

CA$110K - CA$135K/yr

Proactively address any software issues and resolve quickly and effectively Requirements * 10+ years of work experience as a full stack developer (Java+ React/Angular) or any similar role * Exposure ...

TMX Group

Senior Software Developer

Toronto, ON · Hybrid

We are looking for a Senior Software Developer who loves writing code but also enjoys thinking about how the entire system fits together. You will be a key player in our core development team ...

Solace Corporation

Senior Software Developer

Kanata, ON · On-site +1

About the Role This position is for aSenior Software Developer for the AI team. In this role, you will be a key technical leader working on the Solace Agent Mesh: an event-driven Integration and ...

Agfa

Senior Software Developer Cloud

Waterloo, ON

We are seeking a Senior Software Developer to join our Waterloo team. As a vital member of our team, you will be involved in the full software development lifecycle, including design, implementation ...

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All JobsSoftware Developer JobsSenior Software Developer JobsSenior Software Developer Jobs in Ontario

Senior Software Developer information

See Ontario salary details

$52.5K

$114.7K

$162.5K

How much do senior software developer jobs pay per year?

As of Aug 16, 2026, the average yearly pay for senior software developer in Ontario is $114,745.00, according to ZipRecruiter salary data. Most workers in this role earn between $95,000.00 and $130,000.00 per year, depending on experience, location, and employer.

What skills and qualifications are needed to thrive as a senior software developer?

To thrive as a Senior Software Developer, you need deep expertise in programming languages, software architecture, and problem-solving, typically backed by a bachelor’s degree in computer science or a related field. Proficiency with development frameworks, version control systems like Git, and cloud platforms such as AWS or Azure is standard, and certifications in these areas can be beneficial. Leadership, strong communication, and mentoring abilities set standout candidates apart in this role. These skills ensure that complex projects are delivered efficiently, code quality is maintained, and junior team members are effectively guided for overall team success.

What does a senior software developer do?

As a Senior Software Developer, you’ll typically be responsible for leading complex development projects, designing technical solutions, and mentoring junior team members. Daily tasks often include writing and reviewing code, participating in architecture discussions, collaborating with cross-functional teams (such as QA, product management, and DevOps), and troubleshooting high-level technical issues. You may also be involved in setting coding standards, conducting code reviews, and helping to plan sprints or project roadmaps.

What is a senior software developer?

Senior Software Developers are experienced professionals who design, develop, and maintain complex software applications. They often lead development teams, mentor junior developers, and make critical architectural decisions. Their responsibilities include writing high-quality code, troubleshooting technical issues, and ensuring that software projects meet performance and security standards. With deep expertise in programming languages and software engineering principles, they play a key role in delivering successful technology solutions for organizations.

What is the difference between Senior Software Developer vs Software Engineer?

AspectSenior Software DeveloperSoftware Engineer
CredentialsBachelor's degree in CS or related field; experience often 5+ yearsBachelor's or higher in CS or related field; similar experience levels
Work EnvironmentCollaborates on complex projects, mentors juniors, leads technical effortsDesigns, develops, tests software; may work on specific modules or systems
Industry UsageCommonly used in tech companies, startups, and enterprise firmsWidely used across industries, often interchangeable with developer roles

The main difference is that Senior Software Developers typically have more experience, leadership responsibilities, and focus on complex project oversight, while Software Engineers may focus more on designing and implementing software solutions. Both roles require similar credentials and are integral in software development teams, but Senior Software Developers often take on mentorship and strategic tasks.

More about Senior Software Developer jobs

What are the most commonly searched types of Software Developer jobs in Ontario?

The most popular types of Software Developer jobs in Ontario are:

What are popular job titles related to Senior Software Developer jobs in Ontario?

For Senior Software Developer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Senior Software Developer jobs in Ontario look for?

The top searched job categories for Senior Software Developer jobs in Ontario are:

What cities in Ontario are hiring for Senior Software Developer jobs?

Cities in Ontario with the most Senior Software Developer job openings:

What are popular job titles related to Senior Software Developer jobs in ON?

For Senior Software Developer jobs in ON, the most frequently searched job titles are:

Senior Software Developer jobs near you
Infographic showing various Senior Software Developer job openings in Ontario as of August 2026, with employment types broken down into 1% Internship, 78% Full Time, 18% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution, with an average salary of $114,745 per year, or $55.2 per hour.

Senior Software Developer

Staples Canada ULC

Richmond Hill, ON • Hybrid

Full-time

Medical, Dental

Posted 24 days ago

Job description

Some of what you will do:

The Staples technology team is seeking a motivated and talented Junior Software Developer to join our backend development team. We are looking for someone passionate about building robust, scalable backend systems and microservices. This role focuses exclusively on server-side development using .NET and C# technologies. You will work in a collaborative environment where you can grow your skills while contributing to mission-critical applications that serve our customers.

Specifically, You Will:

  • Develop and maintain backend applications and APIs using .NET and C#.

  • Build and enhance microservices architecture components.

  • Design and implement RESTful APIs and web services.

  • Work with databases to create efficient data access layers.

  • Deploy and monitor applications in Azure cloud environment.

  • Write clean, maintainable, and well-documented code.

  • Participate in code reviews and follow development best practices.

  • Contribute to testing strategies including unit and integration testing..

Some of what you need:

  • Bachelor's degree or diploma in Computer Science, Software Engineering, or related field.

  • Relevant coding bootcamp certification or equivalent practical experience.

  • Microsoft certifications (Azure Fundamentals, C# certifications) are a plus.

  • Strong foundational knowledge of C# and .NET framework (.NET 8+).

  • Understanding various design patterns and best practices.

  • Good knowledge of microservices architecture concepts, Cloud Native services, Containerized Architecture.

  • Expertise in RESTful API design and development.

  • Database knowledge (SQL Server preferred, but open to other RDBMS).

  • Familar understanding of Azure cloud services such as EventHub, Table Storage, Blob Storage.

  • Experience with version control systems (Git).

  • Understanding of software development lifecycle (SDLC) and Agile methodology.

  • Experience with Azure services (App Service, Azure Functions, Service Bus, Azure SQL).

  • Knowledge of containerization technologies (Docker, Kubernetes).

  • Familiarity with message queues and event-driven architecture.

  • Understanding of CI/CD pipelines and DevOps practices (Azure DevOps).

  • Experience with Entity Framework Core or other ORM tools.

  • Knowledge of design patterns and software architecture principles.

  • Experience with automated testing frameworks (xUnit, NUnit).

  • Understanding of authentication and authorization (OAuth, JWT).

  • Knowledge of caching strategies (Redis, Azure Cache).

  • 5+ years of professional software development experience.

  • 5+ years of experience with .NET Core/.NET 8+ and C# development.

  • Basic experience with SQL databases and writing queries.

  • Exposure to cloud platforms, preferably Microsoft Azure.

  • Understanding of web service development and API integration.

  • Experience with development tools like Visual Studio or VS Code.

  • Familiarity with agile development methodologies is a plus.

Physical demands/working conditions:

  • Office environment - Hybrid, with 4 days onsite in Richmond Hill, subject to the hybrid policy. 

Some of what you will get:

  • Associate discount

  • Health and Dental benefits

  • RRSP/DPSP

  • Performance bonuses

  • Learning & Development programs

  • And more...

We value transparency in our hiring processes. Please note, artificial intelligence may be used in certain stages to screen, assess, or select applicants, however, a human reviewer makes all final decisions. This posting is for an existing vacancy.
About the Team
At Staples Canada we are dynamic, inspiring partners to our customers and the communities in which we live. As The Working and Learning Company, we inspire people to work smarter, learn more and grow every day. We're looking for curious, approachable, and passionate individuals who love finding solutions. If that's you, let's work, learn, and grow together.

We are building an inclusive and diverse team
Staples Canada is continuously working towards creating an inclusive and diverse work environment. We welcome, value and thrive on perspectives and contributions from backgrounds that vary by race, gender, sexual orientation, gender identity or expression, lifestyle, age, educational background, national origin, religion or physical ability. If you have a disability or special need that requires accommodation, please let us know.

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