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Senior Full Stack Engineer Jobs in Ontario (NOW HIRING)

StackandCo

Senior Full Stack Developer

Galway, NY

\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)

Ottawa, 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 ...

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 ...

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 ...

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 ...

Proof

Senior Full-Stack Developer (Canada)

Waterloo, 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 ...

AltaML

Senior Full Stack Software Engineer

Toronto, ON · On-site

We're looking for a Senior Full Stack Software Engineer who is passionate about building high-quality software in an AI-native way. Someone who treats Claude and the latest agentic coding tools as a ...

Canada Coaster

Full Stack Engineer

Dundas, ON · On-site

As Full Stack Engineer, you'll be reporting to the IT Manager, and be part of the IT team that is responsible for maintaining and extending current systems along with the development of new modules ...

StackandCo

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

Machina Labs

Full Stack Engineer

Chatsworth, ON · On-site

CA$130K - CA$150K/yr

Machina Labs is seeking a Full Stack Engineer to join our software team and help build the systems that power our robotic sheet metal forming platform. In this role, you'll bridge the gap between the ...

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 ...

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 ...

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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 Developer

Galway, NY

StackandCo
See more jobs at StackandCoexternal

Full-time

Re-posted 12 days ago

Job description

\n <\/head>\n \n \n
\n My client, a world renowned, fortune 500 fintech company are seeking a full stack developer to join their team.<\/span>\n
\n <\/div>\n
\n
\n <\/div>\n
\n Role Overview\n
\n
<\/u><\/b>The primary responsibility of the full stack developer, in collaboration with a multidisciplinary delivery team, will be the design and development of software applications based on defined requirements.\n
\n
<\/i>Primary Objectives\n
<\/u><\/b>\n <\/div>\n
    \n
  • Contribute significantly to implementing and documenting technical solutions within a collaborative, high trust, solutions delivery team that will contain scrum masters, product owners, architects, other engineers (developers, test engineers and technical delivery engineers).\n
    <\/li>\n
  • Work within an agile delivery process to deliver high quality estimates and outcomes for complex projects.\n
    <\/li>\n
  • Support the architectural direction, solution specification, development, implementation and delivery of new and existing applications or services.\n
    <\/li>\n
  • Continuously innovate in terms of process and technology.\n
    <\/li>\n
  • Embrace emerging technologies and keep abreast of new frameworks, tools and programming languages.\n
    <\/li>\n
  • Must have strong verbal, written and organizational skills and strong customer focus.\n
    <\/li>\n
  • Be a proactive stakeholder in code quality, coding to standards, secure code (understanding of OWASP) and overall product quality.\n
    <\/li>\n
  • Be responsible for the execution of the full suite of development tasks in a modern delivery pipeline, including validation activities (such as unit, component, system integration and regression testing) and infrastructure activities (such as IAC within automated pipelines).\n
    <\/li>\n
  • Creation of monitoring and logging solutions to allow for state\-of\-the\-art monitoring of the enterprise applications within the production environment.\n
    <\/li>\n
  • Provide knowledge transfer; actively support and educate internal and external team members.\n
    <\/li>\n
  • \n
    \n Partner with developers, analysts, and tech leads across the enterprise to identify business needs and appropriate technical solutions\n
    \n <\/div>\n <\/li>\n <\/ul>\n
    \n Knowledge & Skills\n
    <\/u><\/b>\n <\/div>\n
      \n
    • Minimum 5 years' experience in designing, developing and implementing software applications.\n
      <\/li>\n
    • Full stack development experience is preferred.\n
      <\/li>\n
    • Bachelor's degree in a relevant discipline such as computer science, business informatics or mathematics. Comparable education or professional experience also considered.\n
      <\/li>\n
    • In\-depth experience with several full stack technologies such as Spring, Spring\-Boot, Spring\-Web, JSF, JPA\/Hibernate, REST, Kafka, HTML\/CSS, JavaScript and Bootstrap, React\/Angular.\n
      <\/li>\n
    • Knowledge of modern database technologies (relational\/non\-relational).\n
      <\/li>\n
    • Knowledge of virtual infrastructure and associated services (e.g. public cloud) as well as containerization and orchestration technologies (ideally docker, pcf, kubernetes).\n
      <\/li>\n
    • Knowledge of payments industry ideal (ISO8583, POS etc.)\n
      <\/li>\n
    • Excellent knowledge in JEE\/Spring, JAVA 8, Maven, Shell\-Scripting.\n
      <\/li>\n
    • Experience with micro\-service architectures and linux based operating systems\n
      <\/li>\n
    • Experienced in runtime, build and deployment technologies as well as project tools, e.g. Eclipse, IntelliJ, GitLab, JIRA and Confluence.\n
      <\/li>\n
    • Strong communication skills (e.g. with business analysts and stakeholders as well as technical\-representatives), coordination skills\n
      <\/li>\n
    • Highly organized and highly competent in solving issues and finding solutions.\n
      <\/li>\n
    • Willingness to take ownership and the ability to demonstrate strong personal commitment. Must be comfortable with being considered a reliable and proactive influential team member who is not afraid to take on responsibility in the team (for highlighting, planning and implementing improvements in existing and new applications). Must be high on social skills, team spirit and empathy.\n
      <\/li>\n <\/ul>\n
      \n
      \n <\/div>\n <\/span>\n
      \n <\/body>\n<\/html>

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