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Senior Full Stack Developer Jobs in Toronto, ON (NOW HIRING)

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 ...

KEV Group

Senior Full Stack Engineer

Toronto, ON

We are hiring a Senior Developer to help design, evolve, and scale the core systems that power KEV ... Deliver Full-Stack Capabilities Drive the design and development of user-facing experiences using ...

Ci

Full Stack Developer

Toronto, ON

CA$69K - CA$119K/yr

The Full Stack Developer is responsible for designing and developing web-based and middle-tier applications that support the firm's investment management and trading systems. This role works closely ...

KEV Group

Senior Full Stack Engineer

Toronto, ON · On-site

We are hiring a Senior Developer to help design, evolve, and scale the core systems that power KEV ... Deliver Full-Stack Capabilities Drive the design and development of user-facing experiences using ...

Magna

Full Stack Developer

Brampton, ON · On-site

CA$100K/yr

TheFull Stack Developerwill work with the IoT architect,technical product ownerand a team of developers(Sr full stack, software, IoT, data science)toensure the efficient and effective development of ...

Royal Bank of Canada

Full Stack Developer

Toronto, ON

You will work closely with SMEs, business stakeholders, architects, and senior developers to build ... This role spans both modern full-stack development and Mainframe-based payment processing, offering ...

Td

Sr Full Stack Developer, TD Securities

Toronto, ON

CA$126K - CA$164K/yr

Lead the design and development of modern full-stack applications across Capital Markets, with a ... Mentor junior and intermediate developers, while promoting engineering best practices across the ...

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Senior Full Stack Developer information

See Toronto, ON salary details

$49.1K

$120.4K

$175.1K

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

As of Jul 17, 2026, the average yearly pay for senior full stack developer in Toronto, ON is $120,398.00, according to ZipRecruiter salary data. Most workers in this role earn between $99,251.00 and $138,856.00 per year, depending on experience, location, and employer.

What is the difference between Senior Full Stack Developer vs Backend Developer?

AspectSenior Full Stack DeveloperBackend Developer
Required SkillsProficiency in both frontend and backend technologies, such as JavaScript, HTML, CSS, and server-side languages like Node.js, Python, or JavaSpecialized in server-side development, working with languages like Java, Python, Ruby, or PHP, and database management
Work EnvironmentCollaborates across frontend and backend teams, often involved in full project lifecycleFocuses primarily on backend systems, APIs, and database integration
Common UsageUsed in roles requiring full project oversight and versatile development skillsUsed in roles focused on server-side logic, database management, and API development

The main difference is that a Senior Full Stack Developer handles both frontend and backend development, providing a comprehensive approach to projects, while a Backend Developer specializes solely in server-side logic and database management. Both roles require strong programming skills, but the Full Stack Developer's expertise spans the entire technology stack.

How does a Senior Full Stack Developer typically collaborate with cross-functional teams during a project lifecycle?

As a Senior Full Stack Developer, you'll frequently collaborate with designers, product managers, QA engineers, and other developers to deliver end-to-end solutions. You'll be involved in requirements discussions, offer technical guidance, and help align frontend and backend development with business goals. Your role often includes code reviews, mentoring junior team members, and ensuring seamless integration across various systems. This collaborative environment encourages knowledge sharing and innovation while ensuring project success.

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

To thrive as a Senior Full Stack Developer, you need advanced proficiency in both front-end and back-end programming languages, frameworks, and a solid understanding of software architecture, usually supported by a relevant degree and several years of experience. Mastery of tools such as Git, Docker, CI/CD systems, and cloud platforms like AWS or Azure is typically required, alongside familiarity with databases and version control systems. Strong problem-solving abilities, leadership, effective communication, and collaboration skills set exceptional developers apart. These skills and qualities are crucial for delivering robust, scalable solutions while mentoring teams and efficiently bridging gaps between client requirements and technical implementation.

What are Senior Full Stack Developers?

Senior Full Stack Developers are experienced professionals who design, develop, and maintain both the front-end and back-end components of web applications. They are proficient in multiple programming languages and frameworks, enabling them to handle servers, databases, APIs, and user interfaces. In addition to coding, they often lead development teams, make architectural decisions, and ensure software quality and scalability. Their expertise allows them to oversee the entire application lifecycle, from concept to deployment.
What are the most commonly searched types of Full Stack Developer jobs in Toronto, ON? The most popular types of Full Stack Developer jobs in Toronto, ON are:
What are popular job titles related to Senior Full Stack Developer jobs in Toronto, ON? For Senior Full Stack Developer jobs in Toronto, ON, the most frequently searched job titles are:
What job categories do people searching Senior Full Stack Developer jobs in Toronto, ON look for? The top searched job categories for Senior Full Stack Developer jobs in Toronto, ON are:
What cities near Toronto, ON are hiring for Senior Full Stack Developer jobs? Cities near Toronto, ON with the most Senior Full Stack Developer job openings:
Senior Full Stack Developer jobs near you
Infographic showing various Senior Full Stack Developer job openings in Toronto, ON as of July 2026, with employment types broken down into 71% Full Time, 19% Part Time, 1% Temporary, and 9% Contract. Highlights an 82% Physical, 3% Hybrid, and 15% Remote job distribution, with an average salary of $120,398 per year, or $57.9 per hour.
Full Stack Developer

Full Stack Developer

Quantiphi, Inc.

Toronto, ON • Remote

Other

Re-posted 5 days ago

Job description

While technology is the heart of our business, a global and diverse culture is the heart of our success. We love our people and we take pride in catering them to a culture built on transparency, diversity, integrity, learning and growth.
If working in an environment that encourages you to innovate and excel, not just in professional but personal life, interests you- you would enjoy your career with Quantiphi!

About Quantiphi:

Quantiphi is an award-winning, AI-First digital engineering and consulting company focused on delivering high-impact Services and Solutions that help organizations solve what truly matters. We partner with enterprises to reimagine their businesses through intelligent, scalable, and transformative AI driving measurable outcomes at the very core of their operations.

Since our founding in 2013, Quantiphi has tackled some of the world's most complex business challenges by combining deep industry expertise, disciplined cloud and data engineering practices, and cutting-edge applied AI research. Our work is rooted in delivering accelerated, quantifiable business value, not just technology for technology's sake.

Headquartered in Boston, Quantiphi is a global organization with 4,000+ professionals serving clients across key industry verticals, including BFSI, Healthcare & Life Sciences, CPG, MFG, TME etc. As an Elite and Premier partner to leading cloud and AI platforms such as NVIDIA, Google Cloud, AWS, and Snowflake, we build and deliver enterprise-grade AI services and solutions that create real-world impact.

We've been recognized with:

  • 17x Google Cloud Partner of the Year awards in the last 8 years.

  • 3x AWS AI/ML award wins.

  • 3x NVIDIA Partner of the Year titles.

  • 2x Snowflake Partner of the Year awards.

  • We have also garnered top analyst recognitions from Gartner, ISG, and Everest Group.

  • We offer first-in-class industry solutions across Healthcare, Financial Services, Consumer Goods, Manufacturing, and more, powered by cutting-edge Generative AI and Agentic AI accelerators.

  • We have been certified as a Great Place to Work for the third year in a row- 2021, 2022, 2023.

Be part of a trailblazing team that's shaping the future of AI, ML, and cloud innovation.

Your next big opportunity starts here!

For more details, visit: Website or LinkedIn Page.

Role: 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-performance applications powering next-generation Agentic AI platforms.

In this role, you'll lead the development of API-first, distributed systems and contribute across the stack from backend microservices to modern frontend experiences. You'll partner closely with AI/ML teams to integrate LLM-driven workflows, RAG architectures, and multi-agent systems into production-grade applications.

This is a hands-on engineering role with strong ownership across architecture, developer experience, and system reliability.

Key Responsibilities:

  • Design and build scalable full stack applications using React, TypeScript, and Next.js on the frontend and Python (FastAPI) and/or Node.js on the backend

  • Architect and maintain RESTful APIs and microservices with strong versioning, backward compatibility, and API-first design principles

  • Develop distributed systems leveraging event-driven architectures, messaging systems (Kafka, Pub/Sub), and asynchronous processing

  • Build and integrate LLM-powered applications, including RAG pipelines, agentic workflows, and tool-calling frameworks (LangChain, LangGraph)

  • Collaborate with AI/ML teams to integrate model serving platforms and orchestrate multi-agent systems

  • Implement real-time capabilities using WebSockets, Server-Sent Events (SSE), or streaming frameworks

  • Ensure high-quality engineering standards across testing (TDD/BDD), CI/CD pipelines, and infrastructure-as-code

  • Deploy and manage cloud-native applications on GCP and/or Azure, leveraging Docker and Kubernetes

  • Champion observability and monitoring using logging, metrics, and tracing (e.g., OpenTelemetry)

  • Build developer-friendly tools including SDKs, documentation, and API portals

  • Mentor engineers and contribute to system design, architecture reviews, and best practices

Basic Qualifications:

  • 5-10 years of experience in full stack software development

  • Strong expertise in:

  • Frontend: React, TypeScript, Next.js

  • Backend: Python (FastAPI) and/or Node.js

  • Proven experience building REST APIs, microservices, and distributed systems

  • Hands-on experience with PostgreSQL and data modeling

  • Experience with Docker, Kubernetes, and cloud platforms (GCP and/or Azure)

  • Strong knowledge of CI/CD pipelines (GitHub Actions or similar)

  • Experience with API lifecycle management (authentication, versioning, rate limiting)

  • Solid understanding of system design, scalability, and performance optimization

  • Experience integrating or building applications with LLMs, RAG, or Agentic AI systems

  • Familiarity with LangChain, LangGraph, or similar frameworks

Other Qualifications (OQs):

  • Experience with:

    • LlamaIndex, advanced LangGraph workflows, or multi-agent orchestration

    • Prompt engineering and context engineering

    • Model Context Protocol (MCP) or agent interoperability frameworks

  • Exposure to GraphQL, gRPC, and advanced API design patterns

  • Experience with event-driven systems (Kafka, Pub/Sub, Redis)

  • Knowledge of vector databases (pgvector, Pinecone, Milvus)

  • Experience building real-time/streaming UIs (WebSockets, SSE)

  • Understanding of OAuth 2.0, OIDC, RBAC for secure systems

  • Strong testing practices (TDD, Playwright, contract testing)

  • Experience with OpenTelemetry or similar observability tooling

  • Familiarity with Domain-Driven Design (DDD) and API-first architecture

Healthcare Domain Experience (Nice to Have):

  • Experience working with FHIR R4, HL7 v2, or SMART on FHIR

  • Integration with EHR systems (e.g., Epic)

  • Understanding of HIPAA compliance and healthcare data privacy

  • Exposure to clinical workflows, CDS Hooks, or patient-facing applications

  • Experience building clinical decision support systems or healthcare interoperability solutions

What's in it for YOU at Quantiphi:

  • Make an impact at one of the world's fastest-growing AI-first digital engineering companies.

  • Upskill and discover your potential as you solve complex challenges in cutting-edge areas of technology alongside passionate, talented colleagues.

  • Work where innovation happens - work with disruptive innovators in a research-focused organization with 60+ patents filed across various disciplines.

  • Stay ahead of the curve immerse yourself in breakthrough AI, ML, data, and cloud technologies and gain exposure working with Fortune 500 companies.

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us!

Apply