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Senior Full Stack Software Developer Jobs in Ontario

Syntronic

Senior Full Stack Software Developer

Waterloo, ON · On-site

CA$110K - CA$138K/yr

We are seeking a Senior Full Stack Software Engineer to design, develop, test, and maintain software applications that address customer needs and business objectives. This role is responsible for ...

Aversan

Senior Full Stack Developer

Mississauga, ON · On-site

CA$110K - CA$140K/yr

Senior Full Stack Software Engineer Aversan Inc.(www.aversan.com) is a trusted multi-service engineering and electronics manufacturing company. Aversan delivers leading-edge and reliable safety ...

hireVouch

Sr Full Stack SW Eng

Toronto, ON · On-site

Senior Full Stack Software Engineer Our client is looking for an experienced software engineer with a founder mindset to take a critical role in our rapidly growing early-stage startup. We believe ...

1Valet

Senior Full-Stack Developer

Toronto, ON · Remote

Senior Full-Stack Developer Location: Ottawa, ON (Remote) About the Role We are looking for a ... software, hardware, and operations High ownership, meaningful technical challenges, and visible ...

Quantiphi, Inc.

Full Stack Developer

Toronto, ON · Remote

Full Stack Software Developer Experience Level: 5-10 yrs Work Location: US East/Canada (Remote) Role Overview: We're looking for a Full Stack Software Developer to design and build scalable, high ...

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

Senior Full Stack Software Developer information

See Ontario salary details

$59.5K

$129.3K

$191.5K

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

As of Jun 9, 2026, the average yearly pay for senior full stack software developer in Ontario is $129,325.00, according to ZipRecruiter salary data. Most workers in this role earn between $110,000.00 and $148,000.00 per year, depending on experience, location, and employer.

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

AspectSenior Full Stack Software DeveloperSoftware Engineer
CredentialsBachelor's degree in CS or related field; experience in full stack developmentBachelor's degree in CS or related field; may have certifications in specific technologies
Work EnvironmentCollaborates across front-end and back-end teams, often in agile settingsDesigns, develops, and maintains software applications, often in teams or individually
Industry UsageCommon in tech companies, startups, and agencies requiring versatile development skillsWidely used across industries for software development roles

While both roles involve software development, a Senior Full Stack Software Developer specializes in both front-end and back-end technologies, often taking on leadership responsibilities. A Software Engineer may focus on specific areas of software design and implementation, with less emphasis on full stack expertise. The roles overlap in skills and industry usage, but the senior developer typically has broader responsibilities and experience in full stack development.

What are the key skills and qualifications needed to thrive as a Senior Full Stack Software Developer, and why are they important?

A Senior Full Stack Software Developer needs advanced proficiency in both front-end and back-end programming languages, strong problem-solving skills, and several years of relevant software development experience. Familiarity with frameworks like React or Angular, back-end technologies such as Node.js or Django, and experience with cloud platforms, CI/CD tools, and version control systems like Git are typically required. Excellent communication, teamwork, and leadership abilities help developers collaborate effectively and mentor junior team members. These skills are crucial for designing robust, scalable applications and leading complex projects to successful completion.

What is a Senior Full Stack Software Developer?

A Senior Full Stack Software Developer is an experienced professional who designs, develops, and maintains both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to work on the entire technology stack, from databases and servers to user interfaces. In addition to coding, they often lead projects, mentor junior developers, and help architect scalable solutions that meet business needs. Their role requires strong problem-solving skills, a deep understanding of software development best practices, and the ability to collaborate with cross-functional teams.

What types of projects and technologies can a Senior Full Stack Software Developer expect to work on, and how does the team typically collaborate?

As a Senior Full Stack Software Developer, you can expect to work on a diverse range of projects such as developing scalable web applications, integrating APIs, and optimizing system performance. The tech stack often includes front-end frameworks like React or Angular, back-end environments such as Node.js, Python, or Java, and databases like PostgreSQL or MongoDB. Collaboration is highly cross-functional—you’ll regularly coordinate with product managers, UX/UI designers, QA engineers, and other developers through agile methodologies, code reviews, and sprint planning sessions. This role offers opportunities to mentor junior developers, influence architectural decisions, and contribute to continuous process improvement.
What are the most commonly searched types of Full Stack Software Developer jobs in Ontario? The most popular types of Full Stack Software Developer jobs in Ontario are:
What cities in Ontario are hiring for Senior Full Stack Software Developer jobs? Cities in Ontario with the most Senior Full Stack Software Developer job openings:
Senior Full Stack Software Developer jobs near you

Senior Full Stack Software Developer

Syntronic

Waterloo, ON • On-site

CA$110K - CA$138K/yr

Full-time

Posted 12 days ago

Job description

Join Syntronic: Where Your Innovation Shapes the Future
At Syntronic, we don't just follow industry trends-we set them! Join us in partnering with visionary companies and the brightest minds to turn ground-breaking ideas into reality. Imagine working on cutting-edge telecom advancements, pioneering automotive tech, life-saving healthcare innovations, and next-gen industrial automation. Our projects are diverse, impactful, and at the forefront of technological innovation. Be a part of something extraordinary!

Who are we?:
Syntronic is a global leader in design and development, specializing in electronics, electro-mechanics, and software. We're not just a company; we're a community of innovators. Our teams work on projects that define the future-from creating state-of-the-art communication systems and autonomous vehicles to advancing IoT solutions that revolutionize everyday life. At Syntronic, your work will make a real difference.

What we're looking for:
We are seeking individuals who want to:
        Collaborate with top-tier clients on transformative, cutting-edge projects.
        Engage with and learn from industry leaders
        Innovate from concept to completion, ensuring high standards.
        Gain international experience on global projects.
        Thrive in an entrepreneurial environment that supports new ideas.
        Explore multiple sectors like telecommunications, automotive, healthcare, and industrial automation.

We are seeking a Senior Full Stack Software Engineer to design, develop, test, and maintain software applications that address customer needs and business objectives. This role is responsible for contributing across the entire software development lifecycle, including architecture design, front-end and back-end development, testing strategies, deployment, and ongoing optimization. The ideal candidate is passionate about building scalable, user-focused software solutions while collaborating closely with customers and cross-functional teams.
What you'll do
  • Develop and maintain full stack software applications, including front-end interfaces and back-end services
  • Collaborate with customers, product owners, designers, and architects to gather requirements and deliver user-centric solutions
  • Design high-level software architectures, system integrations, and deployment strategies
  • Build and maintain APIs and microservices that support scalable application functionality
  • Implement software testing strategies and contribute to test-driven development practices
  • Support continuous integration and continuous delivery pipelines to improve development efficiency and software quality
  • Apply security best practices, including data protection, encryption, and anonymization techniques
  • Monitor and optimize application performance while evaluating emerging technologies and development tools
What you'll need to get the job done
  • 6+ years of experience working in Information Technology
  • 4+ years of hands-on software development experience
  • Experience with UI design and development as well as core software engineering practices
  • Practical experience in at least two programming languages or advanced expertise in one programming language
What will make us REALLY love you
  • Experience working directly with customers to gather technical and business requirements
  • Knowledge of microservices architecture and API integration strategies
  • Familiarity with DevOps practices, including CI/CD pipelines and automated testing frameworks
  • Experience evaluating and implementing modern software security and performance optimization practices
$110,000 - $138,000 a year
This posting is for an active opening. 
The role is 4 days per week on-site. 

What you'll love about us:
At Syntronic, our employees are our greatest asset. We foster innovation, collaboration, and excellence, offering opportunities for personal and professional growth. Join a global community that values creativity and diversity.

Ready to Shape the Future with Us?
If you're ready to elevate your career and be part of a team that's making a real impact, we want to hear from you. Apply today and embark on your journey with Syntronic, where your ideas and innovations can truly make a difference.

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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