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Intermediate Full Stack Developer Jobs in Ontario

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 ...

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 ...

MaintainX

Full-Stack Developer - IAM

Toronto, ON · On-site

CA$150/day

This role has openings at Intermediate and Senior level positions. The Identity team builds the ... full-stack software development. * Strong programming skills in C# and/or TypeScript , with ...

CDM Smith

Senior Full Stack Developer

Toronto, ON · Remote

Trinnex, a wholly owned subsidiary of CDM Smith, is looking for a Senior Full Stack Developer to join our growing Digital Solutions team. You'll work on modern, highimpact applications that bring ...

Highspring

We are looking for a Senior Full Stack Developer to join one of our delivery squads supporting a large-scale wealth management servicing initiative. In this role, you will contribute to the design ...

New

Apptoza Inc.

Java Full Stack Developer

Toronto, ON · On-site

Java Full Stack Developer (Angular) Location: Toronto, ON Duration: Long Term Contract Act as the end-to-end technical owner for business banking initiatives Must have strong knowledge on the ...

New

StackandCo

\n \n \n \n \n The successful Senior Full Stack Developer will assume ownership for a diversity of greenfield projects and mentor junior developers. \n \n \n \n \n \n This role will involve adding ...

STACK IT Recruitment

Full Stack Developer

Ottawa, ON · On-site

CA$80K - CA$95K/yr

A strong full-stack developer who enjoys both problem-solving and building * Someone comfortable working across legacy and modern web environments * Curious, adaptable, and eager to learn new ...

StackandCo

\n \n \n \n \n Our client is currently looking for a Full\-Stack Developer to directly work with the in\-house development team (currently 16 team members). The ideal candidate will have the desire to ...

Hays

Full Stack Engineer

Toronto, ON

Java Full Stack Developer Location: Toronto, ON Type: Contract Rate: CAD50/hr - CAD60/hr We are looking for an experienced Senior Full Stack Developer with strong hands-on expertise in Angular Java ...

StackandCo

\n \n \n \n \n Our client is currently looking for a Full\-Stack Developer to directly work with the in\-house development team (currently 16 team members). The ideal candidate will have the desire to ...

StackandCo

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

Scribendi

Senior Full Stack Developer

Chatham, ON · On-site

Scribendi is seeking a Senior Full-Stack Engineer to build AI-driven products that empower researchers worldwide. You will work across the full stack to deliver scalable, high-performance ...

StackandCo

\n \n \n \n \n Our client has a requirement for an experienced Full\-Stack Developer to be a key part at every stage of the SDLC. \n \n \n \n \n \n Experience working in a similar role is required and ...

Scribendi

Senior Full Stack Developer

Toronto, ON · On-site

Scribendi is seeking a Senior Full-Stack Engineer to build AI-driven products that empower researchers worldwide. You will work across the full stack to deliver scalable, high-performance ...

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Showing results 1-20

All JobsIntermediate Full Stack Developer JobsIntermediate Full Stack Developer Jobs in Ontario

Intermediate Full Stack Developer information

See Ontario salary details

$36.5K

$98.6K

$163K

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

As of Jun 14, 2026, the average yearly pay for intermediate full stack developer in Ontario is $98,643.00, according to ZipRecruiter salary data. Most workers in this role earn between $61,500.00 and $124,000.00 per year, depending on experience, location, and employer.

What is L1, L2, L3, and L4 developer?

In the context of an Intermediate Full Stack Developer role, L1, L2, L3, and L4 typically refer to different levels of seniority or expertise within a company's technical ladder. L1 is usually entry-level, L2 and L3 are mid-level with increasing responsibilities, and L4 often denotes senior or lead developers who handle complex tasks and mentorship. These levels help define expectations, skills, and experience required for each stage in a developer's career progression.

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

To thrive as an Intermediate Full Stack Developer, you need solid proficiency in front-end and back-end programming languages (such as JavaScript, HTML/CSS, and a backend language like Node.js, Python, or Java), along with experience in database management and version control systems. Familiarity with frameworks (e.g., React, Angular, Express), cloud services, and tools like Git is typically required, and certifications in relevant technologies can be advantageous. Strong problem-solving abilities, effective communication, and teamwork distinguish high-performing developers in this role. These combined technical and interpersonal skills are crucial for efficiently building, deploying, and maintaining robust, user-friendly web applications in collaborative environments.

Is full stack worth it in 2026?

For an Intermediate Full Stack Developer, full stack development remains a valuable skill set in 2026 due to ongoing demand for versatile developers proficient in both front-end and back-end technologies. Staying current with frameworks like React, Node.js, and cloud platforms enhances job prospects and career growth in this field.

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

AspectIntermediate Full Stack DeveloperFront End Developer
Required SkillsProficiency in both front-end and back-end technologies, including JavaScript, HTML, CSS, and server-side languagesSpecialized in client-side technologies like HTML, CSS, JavaScript, and frameworks such as React or Angular
Work EnvironmentWorks on both server and client-side applications, often in full project cyclesFocuses primarily on user interface and experience
Common UsageUsed across startups and full-stack teams in various industriesCommon in front-end teams within larger organizations

The Intermediate Full Stack Developer has a broader skill set covering both front-end and back-end development, while the Front End Developer specializes in creating and optimizing user interfaces. The choice depends on whether the role requires full-stack capabilities or a focus on client-side development.

Will Fullstack be replaced by AI?

Full Stack Developers perform tasks that involve designing, coding, and maintaining both frontend and backend systems, which require complex problem-solving and creativity. While AI tools can assist with coding and automation, they are unlikely to fully replace the need for human developers who understand project context, user experience, and system architecture. Continuous learning and adapting to new technologies remain essential in this role.

What is an Intermediate Full Stack Developer?

An Intermediate Full Stack Developer is a software professional with a few years of experience who is proficient in both front-end and back-end web development. They are capable of working on the user interface, server-side logic, databases, and APIs, often collaborating with other team members to build and maintain web applications. Intermediate developers have moved beyond entry-level tasks, can work independently on moderately complex projects, and are familiar with industry-standard tools and frameworks. Their role often includes troubleshooting, optimizing code, and contributing to architecture decisions while still learning and expanding their skill set.

Can I become a full stack developer with no experience?

Becoming an intermediate full stack developer typically requires gaining experience through self-study, coding projects, or coding bootcamps, as employers often look for demonstrated skills in front-end and back-end technologies. While it is possible to start learning without prior experience, reaching an intermediate level usually involves building a portfolio and understanding frameworks, databases, and version control tools like Git.

What are some common challenges faced by Intermediate Full Stack Developers when balancing front-end and back-end responsibilities?

Intermediate Full Stack Developers often encounter the challenge of effectively managing tasks across both front-end and back-end domains, which requires staying updated with rapidly evolving technologies on both sides. Coordinating the integration of user interfaces with server logic, ensuring seamless communication between components, and maintaining code quality across the stack can be demanding. Additionally, they frequently collaborate with UI/UX designers, DevOps engineers, and QA teams, making strong communication and time management skills essential. Addressing these challenges provides valuable experience and prepares developers for more advanced roles in the future.
What are the most commonly searched types of Full Stack Developer jobs in Ontario? The most popular types of Full Stack Developer jobs in Ontario are:
What cities in Ontario are hiring for Intermediate Full Stack Developer jobs? Cities in Ontario with the most Intermediate Full Stack Developer job openings:
Intermediate Full Stack Developer jobs near you
Full Stack Developer

Full Stack Developer

Quantiphi, Inc.

Toronto, ON • Remote

Other

Posted 2 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