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Senior Full Stack Developer Jobs in Ontario (NOW HIRING)

Trellis

Senior Full Stack Developer

Kanata, ON

We're looking for a passionate Senior Full-Stack Developer who wants to make a difference in a fast-growing startup. We are a B2B SaaS company that provides an AI-powered software platform for e ...

Targeted Talent

Senior Full-Stack Developer

Ottawa, ON · Remote

We are looking for an experienced Senior Full-Stack (React & Node) Developer for our client. This is a permanent position that is completely remote! Our client is a fintech company based out of ...

Targeted Talent

Senior Full-Stack Developer

Ottawa, ON · Remote

We are looking for an experienced Senior Full-Stack (React & Node) Developer for our client. This is a permanent position that is completely remote! Our client is a fintech company based out of ...

StackandCo

Senior Full Stack Developer

Galway, NY · On-site

\n \n \n \n \n My client, a world renowned, fortune 500 fintech company are seeking a full stack developer to join their team. \n \n \n \n \n \n Role Overview The primary responsibility of the full ...

StackandCo

You will work on a high performing team of Senior Full Stack Engineers where you will be building a revolutionary new Banking App. \n \n \n \n \n \n Requirements: You will have hands on commercial ...

Konrad

Senior Full Stack Developer

Toronto, ON · Hybrid

CA$120K - CA$145K/yr

About The Role As a Senior Full Stack Developer you'll be tasked with working on web application development. Working within the software development team, your duties will require you to assist in ...

StackandCo

\n \n \n \n \n Role Overview The primary responsibility of the full stack developer, in collaboration with a multidisciplinary delivery team, will be the design and development of software ...

CIBC

Sr. Full Stack Developer

Toronto, ON · Hybrid

To learn more about CIBC, please visit CIBC.com What you'll be doing Join our Core Banking and Payments Technology team as a Sr. Full Stack Developer, where you'll play a crucial role in delivering ...

Posted today

CIBC US

Sr. Full Stack Developer

Toronto, ON · Hybrid

To learn more about CIBC, please visit CIBC.com What you'll be doing Join our Core Banking and Payments Technology team as a Sr. Full Stack Developer, where you'll play a crucial role in delivering ...

Posted today

Priceline

Senior Full-Stack Developer

Toronto, ON · Hybrid

CA$140K - CA$160K/yr

Senior Full-Stack Engineer (Applied AI) Our Technology team is the backbone of our company: constantly creating, testing, learning and iterating to better meet the needs of our customers. If you ...

Moneris

Senior Full Stack Developer

Toronto, ON · On-site +1

CA$100K - CA$142K/yr

Senior Full Stack Developer Design and build secure, scalable backend services, integrations, and content-driven frontends that unify SaaS platforms, enterprise systems, and AI capabilities into ...

Priceline.com LLC

Senior Full-Stack Developer

Toronto, ON · Hybrid

CA$140K - CA$160K/yr

Senior Full-Stack Engineer (Applied AI) Our Technology team is the backbone of our company: constantly creating, testing, learning and iterating to better meet the needs of our customers. If you ...

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Showing results 21-40

All JobsFull Stack Developer JobsSenior Full Stack Developer JobsSenior Full Stack Developer Jobs in Ontario

Senior Full Stack Developer information

See Ontario salary details

$51.5K

$126.2K

$183.5K

How much do senior full stack developer jobs pay per year?

As of Aug 12, 2026, the average yearly pay for senior full stack developer in Ontario is $126,159.00, according to ZipRecruiter salary data. Most workers in this role earn between $104,000.00 and $145,500.00 per year, depending on experience, location, and employer.

What is the difference between Senior Full Stack Developer vs Backend Developer?

AspectSenior Full Stack DeveloperBackend Developer
Required SkillsProficiency in both frontend and backend technologies, such as JavaScript, HTML, CSS, and server-side languages like Node.js, Python, or JavaSpecialized in server-side development, working with languages like Java, Python, Ruby, or PHP, and database management
Work EnvironmentCollaborates across frontend and backend teams, often involved in full project lifecycleFocuses primarily on backend systems, APIs, and database integration
Common UsageUsed in roles requiring full project oversight and versatile development skillsUsed in roles focused on server-side logic, database management, and API development

The main difference is that a Senior Full Stack Developer handles both frontend and backend development, providing a comprehensive approach to projects, while a Backend Developer specializes solely in server-side logic and database management. Both roles require strong programming skills, but the Full Stack Developer's expertise spans the entire technology stack.

How does a senior full stack developer typically collaborate with cross-functional teams during a project lifecycle?

As a Senior Full Stack Developer, you'll frequently collaborate with designers, product managers, QA engineers, and other developers to deliver end-to-end solutions. You'll be involved in requirements discussions, offer technical guidance, and help align frontend and backend development with business goals. Your role often includes code reviews, mentoring junior team members, and ensuring seamless integration across various systems. This collaborative environment encourages knowledge sharing and innovation while ensuring project success.

What are the key skills and qualifications needed to thrive as a senior full stack developer, and why are they important?

To thrive as a Senior Full Stack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, usually supported by a relevant degree and several years of experience. Mastery of tools such as Git, Docker, CI/CD systems, and cloud platforms like AWS or Azure is typically required, alongside familiarity with databases and version control systems. Strong problem-solving abilities, leadership, effective communication, and collaboration skills set exceptional developers apart. These skills and qualities are crucial for delivering robust, scalable solutions while mentoring teams and efficiently bridging gaps between client requirements and technical implementation.

What is a senior full stack developer?

Senior Full Stack Developers are experienced professionals who design, develop, and maintain both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to handle servers, databases, APIs, and user interfaces. In addition to coding, they often lead development teams, make architectural decisions, and ensure software quality and scalability. Their expertise allows them to oversee the entire application lifecycle, from concept to deployment.
What are the most commonly searched types of Full Stack Developer jobs in Ontario? The most popular types of Full Stack Developer jobs in Ontario are:
What are popular job titles related to Senior Full Stack Developer jobs in Ontario? For Senior Full Stack Developer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Senior Full Stack Developer jobs in Ontario look for? The top searched job categories for Senior Full Stack Developer jobs in Ontario are:
What cities in Ontario are hiring for Senior Full Stack Developer jobs? Cities in Ontario with the most Senior Full Stack Developer job openings:
Senior Full Stack Developer jobs near you
Infographic showing various Senior Full Stack Developer job openings in Ontario as of August 2026, with employment types broken down into 1% Internship, 79% Full Time, 14% Part Time, 5% Contract, and 1% Nights. Highlights an 85% Physical, 4% Hybrid, and 11% Remote job distribution, with an average salary of $126,159 per year, or $60.7 per hour.

Senior Full Stack Developer

Trellis

Kanata, ON

Full-time

Re-posted 22 days ago

Job description

We're looking for a passionate Senior Full-Stack Developer who wants to make a difference in a fast-growing startup. We are a B2B SaaS company that provides an AI-powered software platform for eCommerce merchants to generate more demand for their products. We use the latest advancements in artificial intelligence and automation to drive profitable sales for our clients. Our software platform currently supports marketplaces like Amazon and Google Shopping. With over 8M sellers globally, this is an exciting opportunity to be a big part of building a powerhouse in the retail demand generation space.

At Trellis, you'll have the opportunity to work in a fast-growing company and play an impactful role. As part of our team, you'll be helping great companies sell their products on Amazon, Google, and all over the internet. This is a high-growth and impactful role that will give you tons of opportunities to drive decisions for projects from inception through production.


What You'll Get To Do

  • Lead impactful features and projects from conception to completion, working with stakeholders to identify project risks and recommend mitigating solutions.
  • Collaborate with our product team to build powerful and easy-to-use features and modules.
  • Maintaining the system in general, on-call bug-fixing for mission-critical issues
  • Own new features, craft technical specs
  • Work with lots and lots of data
  • Write lots of code in Python and React/JS


Our Tech Stack

  • Web: HTML, Javascript, CSS, React
  • Backend: Python, Django, Postgres, Redis.
  • Distributed Computing: Task Queues, Celery, RabbitMQ
  • Infrastructure: AWS EC2, Kubernetes, Docker, Terraform


What You Need

  • Have 5 years of experience in a frontend, backend, or full stack role.
  • Programming experience in Python, JavaScript, C#, Java, or another object-oriented language.
  • An eagerness to learn new things and improve upon existing skills, abilities, and practices.
  • Experience with databases, SQL or NoSQL.
  • Experience with APIs, REST or GraphQL
  • Knowledge in an Agile software development environment,
  • Experience with version control systems (Git, Subversion, etc..).
  • Have a real passion for clean code and finding elegant solutions to problems.
  • Eager to expand your knowledge and abilities in Python and cloud-based technologies.


Nice to Haves

  • Experience building scalable workflows using task queues.
  • Experience integrating with 3rd parties APIs
  • Security and Authentication
  • Machine Learning and Algorithms


Compensation

  • Competitive Salary
  • Stock options
  • Comprehensive health benefits package.


The Trellis Team

At Trellis, we are passionate about delivering results and a positive user experience to our client brands. With that narrow goal, our driven team works to build out an ambitious product roadmap while seeking out and responding promptly to requests from our current clientele.

We are witnessing a generational shift in consumer behavior in e-commerce. By joining the Trellis team, you too can participate directly in enabling the market transition. If you have an analytical mindset with a willingness to learn and a passion for high-paced forward progress, then we want to hear from you!

Trellis is committed to providing equal opportunity to all applicants and employees. All employment decisions are based on business needs, job requirements and individual qualifications, without regard to race, colour, religion or belief, national or ethnic origin, gender, age, disability, sexual orientation, gender identity and/or expression, marital or civil status, political affiliation, family or parental status, or any other status protected by the laws or regulations in the jurisdictions in which we operate.

These protections extend to all management practices and decisions, including recruitment and hiring practices, appraisal systems, promotions, demotions, transfers, compensation changes, training, career development programs, layoffs, and terminations.


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