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Senior Software Developer Jobs in Ontario (NOW HIRING)

Senior Software Developer Role Overview We are seeking an experienced Software Developer with strong Java development skills and hands-on experience building real-time data streaming solutions in ...

... 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 ...

... 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 ...

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 ...

Senior Software Developer

Toronto, ON Β· On-site

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 ...

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 ...

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 ...

Showing results 41-60

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 Sep 13, 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 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 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 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 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.

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 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:

Infographic showing various Senior Software Developer job openings in Ontario as of August 2026, with employment types broken down into 85% Full Time, 11% Part Time, and 4% Contract. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $114,745 per year, or $55.2 per hour.

Senior Software Developer

Chalk River, ON β€’ On-site

Full-time

Retirement, PTO

Re-posted 10 days ago


Job description

Are you looking for a role that will challenge you? Can you see yourself developing and supporting software products to gather, preserve and present facility operations data in compliance with CNL's Operator Surveillance and Equipment Reliability Management Control Procedures, and Canadian Nuclear Safety Commission license conditions? Do you enjoy working for multiple facilities on a variety of projects which have company-wide applicability? If you answered yes, then this may be the job for you! Apply today!


What will you be doing!

  • Assuming the team lead duties in the absence of the CTA-CSE Team-Leader, including directing the day-to-day activities of three to six team members, as well as reporting any requested information to the Branch Manager.
  • Developing new software products and significant changes to existing software products.
  • Supporting existing software in response to customer requirements.
  • Applying thorough change oversight, review, and validation services, tracking all changes, reviews and testing.
  • Implementing and testing configuration changes, then applying them to production servers.
  • Working closely with the team lead to deliver software rollouts, provide development guidance, and plan work and progression, including balancing the needs of current clients with the production of enhancements and the servicing of new clients.
  • Other duties as assigned by your manager.

What we are looking for:

  • Education
    • At minimum, a Bachelor (Honours) degree in Engineering or Science from a university of recognized standing; or membership in an engineering or scientific professional organization authorized by statute to establish qualification for membership in that organization.
  • Experience
    • A minimum of 7-8 years of relevant experience is required, including:
      • Extensive experience in developing distributed applications utilizing MS SQL and web programming technologies (essential).
      • Extensive experience in Mobile Computer/Scanner software application development.
      • Extensive experience in Mobile Computer/Scanner system interface interactions.
      • Extensive experience in Web-based Technologies (HTTP, HTML, CSS, VB.NET, BOOTSTRAP, JAVA).
      • Extensive experience in C# (or C, C++) Development.
      • Extensive experience in VB.NET Development.
      • Experience working with Microsoft Excel (VBA), Word, etc.
      • Experience with multi-platform development.
  • Knowledge, Skills & Abilities
    • Ability to design, document, and implement solid, well-designed software systems, end-to-end.
    • Ability to plan computer system deployment and operational support activities (software/hardware upgrades, etc.).
    • Ability to lead a cohesive team of developers (in the absence of the team lead).
    • Well-versed in database access from applications and front-end web interfaces.
    • Ability to mentor junior team members.
    • Ability to switch between tasks and handle multiple requests on a per-day basis.
    • Knowledge of CNL's policies and procedures is an asset.
    • Demonstrated strong verbal and written communication skills.
    • Ability to interface with a variety of internal and external staff.
    • Able to prioritize activities based on operational demands and resource availability.
    • Ability to lead by example in performing the duties of all members.
    • Ability to mentors junior staff members when requested.
    • Web-based technology knowledge.
    • Mobile computer/phone industry knowledge.
    • Knowledge of multi-platform computing and toolsets.
    • Knowledge of typical facility usage of electronic surveillance systems.
  • Security Clearance Eligibility Required
    • Reliability Status with Site Access Security Clearance (SASC), which has a minimum requirement of 3-5 years of verifiable history in Canada, Australia, New Zealand, the United States and/or the United Kingdom. CNL implements security screening in accordance with the Treasury Board of Canada Secretariat's "Standard on Security Screening" and the "Policy on Government Security."


Working Conditions:

  • Working schedule: Five (5) days per week, seven and a half (7.5) hours per day for a thirty-seven and a half (37.5) hour work week.
  • This position is part of the CRPEG Union and is governed by the terms and conditions outlined in the CRPEG Collective Agreement. As a member of this bargaining unit, you'll benefit from clear expectations around hours of work, wages, vacation, and other conditions that support a fair and consistent working environment.


Why CNL?

Does the idea of working with a dynamic team across Canada to advance nuclear science and technology for a clean and secure world excite you? At CNL, we're reinventing ourselves to be industry leaders-pioneering solutions to the problems that matter most.

From building the next generation of clean nuclear and hydrogen energy technologies, to developing targeted cancer treatments, to continuing our global leadership in environmental remediation-we are driven by impact, innovation, and purpose.

What We Offer: A Total Rewards Package

We believe in taking care of our people. Here's what you can expect as part of our team:

  • Paid time off: vacation, sick, personal, and floater days
  • Benefits effective Day One - no waiting period
  • Tuition support to help you keep learning and growing
  • A defined-benefit pension plan or a defined-contribution pension plan, depending on your employee group, to support your longterm financial security

Do Our Priorities Resonate with You?

  • Delivering clean energy for today and tomorrow
  • Restoring and protecting the environment
  • Contributing to the health of Canadians

If so, you'll feel right at home at CNL!


Location: Hybrid Onsite Eligible

CNL works with employees across our Canadian locations to enable remote work when possible. This role requires that the majority of time worked be at CNL's Chalk River Laboratory site while also providing opportunities to work remotely, where possible, if desired by the employee.

Please note: This is a hybrid position, with a combination of remote work and onsite presence at our Chalk River Laboratory, Ontario.

Our Commitment to Equity, Diversity & Inclusion

At CNL, we are committed to fostering an environment that promotes equity, diversity, and inclusion. We celebrate and welcome employees, stakeholders, and partners of all backgrounds and identities. Click here to read all about it!

We are proud to uphold a workplace culture grounded in our Core Values:

  • Respect
  • Teamwork
  • Accountability
  • Safety
  • Integrity
  • Excellence

These values drive our employment practices and ensure meaningful career development opportunities and accommodations for all employees.

CNL is an equal opportunity employer. If you require accommodation during any phase of the hiring process, please let us know via jobs@cnl.ca. All requests will be handled with confidentiality.

CNL operates on sites located on the traditional lands, waterways and ceded and unceded territories of Indigenous peoples. CNL recognizes and affirms all First Nations, Metis communities and Inuit in this land we now know as Canada. We acknowledge, respect and seek to better understand Indigenous history, rights and title on the lands where we work and develop projects. We honour and respect the importance of the relationship between Indigenous peoples and their lands, waters and territories.

#LI-HYBRID

Employment Type: Full-Time