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Senior Full Stack Web Developer Jobs in Mississauga, ON

We're building secure, user-friendly web portals that empower retirees and employees to take ... full-stack development * Advanced proficiency in frontend technologies: HTML5, CSS, JavaScript ...

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 ... web applications. * Strong experience designing and maintaining APIs and service-based or event ...

We are hiring a Senior Developer to help design, evolve, and scale the core systems that power KEV ... Strong frontend experience building modern web applications using React, JavaScript, HTML, and CSS ...

Senior Full Stack Developer

Toronto, ON · On-site

CA$150K - CA$190K/yr

ROLE SALARY BAND $150,000 - $190,000 ROLE OVERVIEW The Senior Full stack Developer is a key ... Construct flexible state management patterns (Redux Toolkit, Zustand, React Query) across web ...

Senior Full-Stack Engineer (Media Team) Location: Ottawa, ON or Toronto, ON | Hybrid Department: R&D | Video Type: Permanent | Full-Time Vacancy Status: This is an active, approved role and we are ...

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 ...

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 ...

Senior Full-Stack Developer

Toronto, ON · On-site

CA$120K - CA$143K/yr

Web mapping UX and accessibility * DevOps, CI/CD & cloud infrastructure * QA/testing frameworks for spatial applications Let's Talk Pay We believe in being upfront about pay and helping you make ...

Ingest and connect siloed databases The Role As a Full Stack Engineer, you will be working on one ... stack web development. * Fluent in one or more backend and frontend technologies and have an ...

Ingest and connect siloed databases The Role As a Full Stack Engineer, you will be working on one ... stack web development. * Fluent in one or more backend and frontend technologies and have an ...

Showing results 41-60

Senior Full Stack Web Developer information

What is a senior full stack web developer?

A Senior Full Stack Web Developer is an experienced software 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 build user interfaces, server-side logic, databases, and APIs. Senior-level developers also often lead teams, make architectural decisions, and mentor junior developers. Their expertise ensures that web applications are scalable, secure, and efficient from end to end.

What are the key skills and qualifications needed to thrive as a senior full stack web developer?

To thrive as a Senior Full Stack Web Developer, you need advanced proficiency in both front-end (e.g., JavaScript, React, HTML/CSS) and back-end (e.g., Node.js, Python, databases) technologies, typically backed by a computer science degree or equivalent experience. Expertise with version control systems like Git, cloud platforms (AWS, Azure), and familiarity with CI/CD pipelines or relevant certifications are highly valuable. Strong problem-solving, leadership, and communication skills help you effectively collaborate and mentor junior developers. These skills are crucial for delivering robust, scalable applications and leading projects across diverse technical and team environments.

How does a senior full stack web developer typically collaborate with cross-functional teams on large-scale projects?

Senior Full Stack Web Developers frequently work alongside designers, product managers, QA engineers, and other developers to deliver feature-rich web applications. They participate in sprint planning, code reviews, and architectural discussions, ensuring alignment between front-end and back-end solutions. Effective communication is crucial, as they often translate technical concepts for non-technical stakeholders and help integrate feedback from different departments. This collaborative approach not only improves product quality but also provides valuable leadership opportunities within the development team.

What is the difference between Senior Full Stack Web Developer vs Front End Developer?

AspectSenior Full Stack Web DeveloperFront End Developer
Required SkillsProficiency in both front-end and back-end technologies, including JavaScript, HTML, CSS, server-side languages, databasesExpertise in HTML, CSS, JavaScript, and front-end frameworks like React or Angular
Work EnvironmentFull-stack development teams, both client and server-side projectsPrimarily UI/UX design, front-end frameworks, and client-side scripting
Common UsageUsed across startups, tech companies, and agencies requiring comprehensive development skillsUsed in projects focusing on user interface, visual design, and user experience

The main difference between a Senior Full Stack Web Developer and a Front End Developer lies in scope. The senior full stack role covers both front-end and back-end development, requiring broader skills and experience, while the front end developer specializes in creating and optimizing the user interface and experience.

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Infographic showing various Senior Full Stack Web Developer job openings in Mississauga, ON as of August 2026, with employment types broken down into 78% Full Time, 13% Part Time, 2% Temporary, and 7% Contract. Highlights an 82% Physical, 4% Hybrid, and 14% Remote job distribution.

Senior Full Stack Developer

Lifeworks

Toronto, ON

CA$100K - CA$140K/yr

Full-time

Medical, Life, Retirement, PTO

Re-posted 15 days ago


Job description

TELUS Health is empowering every person to live their healthiest life. Guided by our vision, we are leveraging the power of our leading edge technology and focusing on the uniqueness of each individual to create the future of health. As a global-leading health and well-being provider - encompassing physical, mental and financial health - TELUS Health is improving health outcomes for consumers, patients, healthcare professionals, employers and employees.

Join our team and what we'll accomplish together
The Retirement & Benefits team at TELUS Health is modernizing how millions of Canadians access critical benefits information. We're building secure, user-friendly web portals that empower retirees and employees to take control of their financial wellbeing. You'll join a team of talented engineers and designers who are passionate about solving complex problems and creating meaningful impact at scale.
This is a strategic opportunity to drive technical innovation across our platform while mentoring the next generation of software developers. If you thrive in an environment where you can balance hands-on development with technical leadership, this is where you belong.What you'll do

In this role, you'll wear multiple hats-and that's what makes it unique:

Build & Innovate

  • Design and develop cutting-edge web applications using Angular and modern web technologies

  • Architect scalable solutions that serve millions of users while maintaining security and performance

  • Translate complex business requirements into elegant technical designs that your team can execute with confidence

  • Drive technical excellence through code reviews, design standards, and continuous improvement practices

Lead & Mentor

  • Guide junior developers through challenging problems, fostering their growth and building technical confidence

  • Shape the product architecture and lead technical discussions with stakeholders across design, backend, and product teams

  • Be the go-to technical expert when the stakes are high-solving critical issues and preventing production outages

Strategize & Evolve

  • Research emerging technologies and champion innovations that keep us ahead of the curve

  • Develop accurate estimates and propose creative solutions that balance technical elegance with business reality

  • Partner with cross-functional teams to anticipate market shifts and evolve our platform proactively

Support & Troubleshoot

  • Provide expert-level technical support for urgent, complex issues impacting users

  • Establish best practices for system observability, monitoring, and performance

  • Continuously improve our support processes and documentation to reduce friction for internal and external users

What you bring

Must-Have Experience & Expertise

  • 12+ years of proven expertise in application architecture and full-stack development

  • Advanced proficiency in frontend technologies: HTML5, CSS, JavaScript, TypeScript, and Angular

  • Strong backend development experience with C#, .NET Framework, .NET Core, and ASP.NET

  • Deep knowledge of MS SQL Server and relational database design

  • Hands-on experience with microservices architecture and RESTful API design

  • Proficiency in Visual Studio, GIT, and Azure DevOps pipeline management

  • Demonstrated expertise in designing scalable multi-tier applications with proven design patterns

  • Strong background in Agile/SCRUM methodologies

Technical Competencies

  • Advanced PL/SQL and client-side JavaScript expertise

  • Cloud-based deployment and orchestration (Azure, hands-on experience)

  • Azure Application Insights and cloud-based monitoring platforms

  • SAST tools (SonarQube) for code quality assurance

  • RESTful API design with JSON/XML data interchange formats

  • Logging frameworks and system observability best practices

Professional Strengths

  • Self-starter with excellent organizational and time management skills

  • Strong business acumen and project management capabilities

  • Experience developing for accessibility standards

  • Ability to communicate complex technical concepts to non-technical stakeholders

Nice-to-Have Skills

  • Experience with message queuing systems (MSMQ, RabbitMQ, Azure Service Bus)

  • Hands-on DevOps practices and infrastructure-as-code

  • Octopus Deploy experience for cloud orchestration

  • Track record of mentoring developers through career transitions

Why TELUS Health
  • Impact at Scale: Your code directly improves the financial security of millions of Canadians

  • Technical Growth: Work with modern technologies and lead architectural decisions on cutting-edge platforms

  • Leadership Without Leaving Code: Balance mentoring and strategy with hands-on development you love

  • Collaborative Culture: Partner with a diverse team of designers, product managers, and engineers who value innovation

  • Continuous Learning: Stay ahead of emerging technologies and drive technical evolution across our platforms


Salary Range: $100,000 - $140,000

Actual total compensation will be determined based on factors such as knowledge, skills, performance and experience. We encourage all qualified candidates to apply, even if the posted salary range doesn't match your expectations. We're open to discussing competitive compensation packages tailored to your experience level and expertise.

TELUS Health offers rewarding benefits, which may vary per job function, such as:

  • Comprehensive total rewards package highlighting competitive salary and bonus structures, minimum 3 weeks of vacation, and flexible benefits plan to meet the needs of you and your family

  • Flexibility to work in-office, virtually or a combination of both

  • Generous company matched pension

  • Opportunity to give back to communities in which we work, live and serve

  • Career growth and learning & development opportunities to develop your skills

  • And much more...

Job Type: This is for a current vacancy.

Ready to lead the next generation of benefits technology? Let's talk.

A bit about us

We're a people-focused, customer-first, purpose-driven team who works together every day to innovate and do good. We improve lives through our technology solutions and foster a culture of innovation that empowers team members to solve complex problems and create remarkable human outcomes in a digital world.

TELUS is proud to foster an inclusive culture that embraces diversity. We are committed to fair employment practices and all qualified applicants will receive consideration for employment. We offer accommodation for applicants with disabilities, as required, during the recruitment process.

Disclaimer: In accordance with the TELUS Health Solutions Data Center Security Policy, as a condition of employment, all team members whose job functions require they work at a Data Center and/or have access to detailed knowledge of technology related to client service delivery, are subject to a Personnel Security Screening conducted through the Government of Canada.

Note for Quebec candidates: if knowledge of English is required for this position, it is because the team member will be asked, on a regular basis, to interact in English with external or internal parties or to use English applications or software as part of their tasks.

By applying to this role, you understand and agree that your information will be shared with the TELUS Group of Companies' Talent Acquisition team(s) and/or any leader(s) who will be part of the selection process.