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Sr Fullstack Developer Jobs in Ontario (NOW HIRING)

StackandCo

\n \n \n \n \n Senior Fullstack Developer needed for an impressive Irish tech company building a world leading bot\/web crawler detection product. \n \n \n \n \n \n We need engineers who are ...

Reason One

Senior Fullstack Developer

Toronto, ON · Remote

CA$120K - CA$145K/yr

As a Senior Fullstack Developer, you'll lead the technical delivery of enterprise CMS solutions for U.S. healthcare organizations - integrating code and design with CMS functionality on hybrid ...

StackandCo

\n \n \n \n \n Senior Fullstack Developer needed for an impressive Irish tech company building a world leading bot\/web crawler detection product. \n \n \n \n \n \n We need engineers who are ...

StackandCo

... need Fullstack Engineers who are skilled on both the backend and UI, however this role will be much heavier on the server side. \n \n \n \n \n \n You'll get the opportunity to work with other ...

StackandCo

\n \n \n \n \n We have a pressing requirement for an experienced Full Stack Developer to join a hugely successful Irish owned tech company in North Dublin. \n \n \n \n \n \n You'll work in a team of ...

StackandCo

It still maintains a close knit community environment with very low staff turnover. \n \n \n \n \n \n We are looking for a Fullstack Developer \- Java\/Spring stack with a React frontend (more ...

StackandCo

\n \n \n \n \n Our client, an impressive SAAS company, is continuing to build out their tech operations in Dublin. \n \n \n \n \n \n We are looking for Java\/Fullstack Software Engineers to join our ...

NimbleRx

Senior Fullstack Engineer

Toronto, ON

As a Senior Full-Stack Engineer , you will have a hand in architecting the technology and customer experience that are pivotal to multiple web products for patients, pharmacies and other customers of ...

Manulife

Senior AI FullStack Engineer

Waterloo, ON · On-site

We are seeking a Senior FullStack AI Engineer to help shape how modern AIdriven software is built ... Support DevOps practices, including CI/CD automation, environment consistency, and repeatable ...

Virtusa

Fullstack Developer

Toronto, ON

JD We are looking for Senior Angular Developer will be responsible for building and maintaining enterprisegrade web applications that deliver seamless user experiences while leveraging cloudnative ...

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Sr Fullstack Developer information

What is a Sr Fullstack Developer?

A Sr Fullstack Developer is an experienced software engineer who is proficient in both frontend and backend development. They work with a variety of programming languages, frameworks, and databases to build fully functional web applications. In addition to coding, senior fullstack developers often lead projects, mentor junior developers, and help make architectural decisions. Their broad skill set allows them to handle tasks across the entire technology stack, ensuring that applications are efficient, scalable, and user-friendly.

What are some typical challenges a Sr Fullstack Developer faces when balancing front-end and back-end responsibilities?

Sr Fullstack Developers often need to juggle tasks across both the front-end and back-end, which can be challenging when priorities shift quickly or deadlines are tight. Balancing deep technical knowledge in multiple frameworks and languages while ensuring seamless integration requires strong organizational skills and effective communication with both UI/UX designers and backend engineers. Additionally, staying updated with evolving technologies on both ends is crucial, so time management and continuous learning are key to success in this role.

What are the key skills and qualifications needed to thrive as a Sr Fullstack Developer, and why are they important?

To thrive as a Sr Fullstack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, typically supported by a computer science degree or equivalent experience. Familiarity with tools such as Git, Docker, CI/CD pipelines, cloud platforms, and relevant certifications like AWS Certified Developer or similar are often expected. Strong problem-solving abilities, effective communication, and a collaborative mindset are vital soft skills for this role. These competencies enable developers to deliver robust, scalable solutions and effectively drive projects to completion in dynamic team environments.

What is the difference between Sr Fullstack Developer vs Backend Developer?

AspectSr Fullstack DeveloperBackend Developer
Required SkillsProficiency in both frontend (JavaScript, HTML, CSS) and backend (Node.js, Python, Java)Specialized in server-side languages and database management
Work EnvironmentWorks on both client-facing and server-side componentsFocuses primarily on backend systems and APIs
Common UsageUsed across full product development teamsPrimarily in backend-focused roles within development teams

The main difference between a Sr Fullstack Developer and a Backend Developer is the scope of expertise. A Sr Fullstack Developer handles both frontend and backend tasks, while a Backend Developer specializes in server-side development. Both roles require strong programming skills, but the Fullstack role demands broader knowledge across the entire application stack.

What are popular job titles related to Sr Fullstack Developer jobs in Ontario?

For Sr Fullstack Developer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Sr Fullstack Developer jobs in Ontario look for?

The top searched job categories for Sr Fullstack Developer jobs in Ontario are:

What cities in Ontario are hiring for Sr Fullstack Developer jobs?

Cities in Ontario with the most Sr Fullstack Developer job openings:

Sr Fullstack Developer jobs near you
Infographic showing various Sr Fullstack Developer job openings in Ontario as of August 2026, with employment types broken down into 89% Full Time, 7% Part Time, and 4% Contract. Highlights an 82% Physical, 6% Hybrid, and 12% Remote job distribution.

Senior Fullstack Developer

StackandCo

Full-time

Re-posted 7 days ago

Job description

\n <\/head>\n \n \n
\n Senior Fullstack Developer needed for an impressive Irish tech company building a world leading bot\/web crawler detection product.<\/span>
\n <\/div>\n
\n
\n <\/div>\n
\n We need engineers who are particularly strong Java developers with extensive frontend exposure.<\/span>
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\n
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\n You will join a tight\-knit group who love building product and have a keen interest in data driven applications(advantage if you have experience.<\/span>
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\n Experience
<\/u><\/b>\n <\/div>\n
    \n
  • 6+ years' Java\/Spring Development experience
    <\/li>\n
  • Spring Boot experience
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  • Strong frontend experience with any JS framework (React would be an added bonus)
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  • Fast learner and creative
    <\/li>\n
  • Strong skills in relational databases
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  • Experience working on data driven applications would be great
    <\/li>\n
  • Strong communicator, happy to voice opinions
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    \n
    \n <\/div><\/span>
    \n <\/body>\n<\/html>

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