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Senior Full Stack Engineer Jobs in Ontario (NOW HIRING)

Trellis

Senior Full Stack Developer

Kanata, ON · On-site

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 ...

Alquemy

Full Stack Engineer

Toronto, ON

Full Stack Engineer About the Role We are seeking an Full Stack Engineer to design, develop, deploy, and support AI-powered applications using modern large language model (LLM) technologies. You will ...

Alquemy

Full Stack Engineer

Toronto, ON · On-site

Full Stack Engineer Role Overview We are seeking an experienced Full Stack Developer with strong Java expertise to join a technology team focused on building and enhancing scalable, high-performance ...

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 \n Role Overview\n \n The primary responsibility of the ...

Proof

Senior Full-Stack Developer (Canada)

Toronto, ON · Remote

CA$155K - CA$175K/yr

Our platform is growing rapidly, with a 10% month-over-month growth, and we are seeking a skilled and motivated Senior Full-Stack Developer to join our talented engineering team as we scale and ...

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Senior Full Stack Engineer information

What is a senior full stack engineer?

Senior Full Stack Engineers are experienced software developers who are proficient in both front-end and back-end technologies. They design, build, and maintain complex web applications, overseeing the entire software development process from user interface to server-side logic and databases. In addition to coding, they often mentor junior developers, lead technical decisions, and ensure best practices are followed throughout the project lifecycle. Their broad skill set allows them to bridge the gap between different development teams and deliver cohesive, high-quality solutions.

How do senior full stack engineers balance hands-on coding with mentoring and leading team projects?

Senior Full Stack Engineers often split their time between developing complex features, reviewing code, and guiding junior team members. Alongside hands-on coding, they play a key role in architectural decisions, ensuring code quality, and fostering best practices across the team. Effective communication and delegation skills are crucial, as they frequently collaborate with product managers, designers, and other engineers to align technical solutions with business goals. This balance provides opportunities for leadership growth while keeping technical skills sharp.

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

To thrive as a Senior Full Stack Engineer, you need deep proficiency in front-end and back-end development, strong problem-solving skills, and a solid foundation in computer science, often supported by a relevant degree or equivalent experience. Familiarity with frameworks like React or Angular, back-end technologies such as Node.js or Java, cloud services, and version control systems like Git is typically required, along with experience in CI/CD and testing tools. Excellent communication, leadership, and collaboration skills help you guide teams and coordinate across disciplines. These skills are crucial for delivering scalable, high-quality software solutions and effectively leading complex projects.

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

AspectSenior Full Stack EngineerSoftware Developer
CredentialsBachelor's degree in CS or related field; experience often requiredBachelor's degree in CS or related field; entry-level to mid-level experience
Work EnvironmentCollaborates across front-end and back-end teams, often in agile settingsFocuses on coding, testing, and debugging software applications
Industry UsageCommon in tech companies, startups, and enterprise software firmsWidely used across various industries for software development roles

While both roles involve coding and software development, a Senior Full Stack Engineer typically has broader responsibilities across both front-end and back-end systems, often with more experience and leadership duties compared to a Software Developer, who may focus on specific parts of the software stack.

How much do senior full stack engineers make?

Senior full stack engineers typically earn between $100,000 and $160,000 annually, depending on experience, location, and company size. They often possess skills in multiple programming languages, frameworks, and tools, and may receive additional compensation such as bonuses or stock options.

What does a senior full stack engineer do?

A senior full stack engineer designs, develops, and maintains both the front-end and back-end components of web applications. They often lead technical projects, write clean code, and use tools like JavaScript, Python, or Java, along with frameworks such as React or Node.js. They also troubleshoot issues, optimize performance, and collaborate with cross-functional teams to deliver complete software solutions.

What are the most commonly searched types of Full Stack Engineer jobs in Ontario?

The most popular types of Full Stack Engineer jobs in Ontario are:

What cities in Ontario are hiring for Senior Full Stack Engineer jobs?

Cities in Ontario with the most Senior Full Stack Engineer job openings:

Infographic showing various Senior Full Stack Engineer job openings in Ontario as of August 2026, with employment types broken down into 85% Full Time, 12% Part Time, and 3% Contract. Highlights an 85% Physical, 6% Hybrid, and 9% Remote job distribution.

Senior Full Stack Engineer

Toronto, ON • On-site

The Citco Group Limited
See more jobs at The Citco Group Limitedexternal

CA$120K - CA$150K/yr

Full-time

Re-posted 6 days ago

Job description

About Citco:

Since the 1940s Citco has provided specialist financial services to alternative investment funds, investors, multinationals and private clients worldwide. With over 6,000 employees in 45 countries we pioneer innovative solutions that meet our clients' evolving needs, and deliver exceptional service. Our continuous investment in learning means our people are among the best in the industry. And our corporate social responsibility programs provide meaningful and fulfilling work in the community. A career at Citco isn't just a job - it's an opportunity to excel in an environment that genuinely supports your personal and professional development.

About the Role: 

You will be working in a cross-functional team, using agile methodologies to build on-prem and cloud native applications for the financial services industry. We are looking for true team players who can work beyond their specialty to help the team deliver. Every team member is responsible for the quality of the product and should be willing to work on any tasks needed, be it front-end, back end, test automation, deployment automation, etc. The successful candidate will use their experience and talent to help drive the delivery of the system, introduce new tech and guide the evolution of our applications.

About You:

  • Bachelor's degree in Engineering, Computer Science, or equivalent
  • 5+ years of experience with software engineering
  • 3+ years of experience with NodeJS + Typescript
  • 3+ years of experience with React
  • Experience with Docker
  • Experience developing server-side applications using Node.js frameworks such as or similar to NestJS/Hono
  • Solid understanding of HTML5, ES6, CSS3, JavaScript and JavaScript frameworks
  • Experience with source code management such as GIT
  • Experience with relational databases (ideally PostgreSQL)
  • Experience working on Agile teams
  • Solid understanding and demonstrated proficiency with core software development processes - debugging, code tuning, code management and branching, coding styles and refactoring
  • Must be self-motivated and driven, with strong analytical, problem solving, and communication skills.
  • Knowledge of financial industry, specially accounting / general ledger will be preferred.

Salary Range: CAD $120,000 - CAD $150,000

  • This posting is not for an existing vacancy; we are building a candidate pool for future opportunities.

Our Benefits:

Your well-being is of paramount importance to us, and central to our success. We provide a range of benefits, training and education support, and flexible working arrangements to help you achieve success in your career while balancing personal needs. Ask us about specific benefits in your location.

We embrace diversity, prioritizing the hiring of people from diverse backgrounds. Our inclusive culture is a source of pride and strength, fostering innovation and mutual respect.

Citco welcomes and encourages applications from people with disabilities. Accommodations are available upon request for candidates taking part in all aspects of the selection.

Your Role:

  • You will participate and contribute on all team activities such as Sprint Planning, Sprint Execution, Daily Scrum, Sprint Review, Sprint Retrospective
  • Develop front end React components
  • Develop and test server-side code using NodeJs + Typescript
  • Be comfortable using relational databases and have strong knowledge of SQL
  • Perform peer reviews and ensure the quality of the team's work
  • Design and implement unit, integration, and automation tests
  • Responsible for code integration and code deployment of existing modules as well as provide new pipelines for new modules (CI/CD)
  • Have strong background in AWS services and practices.
  • Provide technical leadership to other team members
  • Break-down complex functionalities into granular tasks and stories
  • Stay current on emerging technologies and be able to match them to Citco need when required

Apply