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Full Stack Development Internship Jobs in Ontario

Accenture

AI Full Stack Developer

Toronto, ON · On-site

CA$114K - CA$171K/yr

We are seeking a talented senior full stack developers or team leads to join our Canadian Apps and ... Integrate Gen AI into development workflows and feature development. * Design, develop, and ...

Accenture

AI Full Stack Developer

Ottawa, ON

CA$114K - CA$171K/yr

We are seeking a talented senior full stack developers or team leads to join our Canadian Apps and ... Integrate Gen AI into development workflows and feature development. * Design, develop, and ...

Proof

Senior Full-Stack Developer (Canada)

Toronto, ON · Remote

CA$155K - CA$175K/yr

... Full-Stack Developer to join our talented engineering team as we scale and expand. What You'll Do ... Backend development using Go (Golang), creating and optimizing APIs, database usage, and core ...

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Be Seen First

Senior Software Developer (Full Stack)

Mississauga, ON · On-site

CA$120K/yr

Leverage modern AI development tools (e.g., Claude, VS Code AI tools) to streamline engineering ... Full-Stack & Systems Development: Advanced expertise in developing scalable web applications ...

Proof

Senior Full-Stack Developer (Canada)

Waterloo, ON · Remote

CA$155K - CA$175K/yr

... Full-Stack Developer to join our talented engineering team as we scale and expand. What You'll Do ... Backend development using Go (Golang), creating and optimizing APIs, database usage, and core ...

Trusscore USA Inc

Full Stack Developer

Kitchener, ON

$85K - $95K/yr

Trusscore invests heavily in R&D to discover breakthroughs in materials and manufacturing processes ... Your Mission Trusscore is seeking a mid-level full-stack developer to help build, standardize and ...

Proof

Senior Full-Stack Developer (Canada)

Ottawa, ON · Remote

CA$155K - CA$175K/yr

... Full-Stack Developer to join our talented engineering team as we scale and expand. What You'll Do ... Backend development using Go (Golang), creating and optimizing APIs, database usage, and core ...

Trusscore

Full Stack Developer

Kitchener, ON · On-site

CA$85K - CA$95K/yr

Trusscore invests heavily in R&D to discover breakthroughs in materials and manufacturing processes ... Your Mission Trusscore is seeking a mid-level full-stack developer to help build, standardize and ...

Royal Bank of Canada

AI Full Stack Builder

Toronto, ON · Hybrid

The Data, AI, and Research Technology (DART) team is seeking an AI Full Stack Builder - a developer ... Hands-on development experience building applications across multiple layers of the technology ...

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All JobsFull Stack Development JobsFull Stack Development Internship JobsFull Stack Development Internship Jobs in Ontario

Full Stack Development Internship information

What is a full stack development internship?

A Full Stack Development Internship is a temporary training position where interns gain hands-on experience in both front-end and back-end web development. Interns work with various technologies, such as HTML, CSS, JavaScript, databases, and server-side languages, to build and maintain complete web applications. This role helps aspiring developers understand the software development lifecycle, collaborate with teams, and apply classroom knowledge to real-world projects. It's an excellent opportunity for students or recent graduates to enhance their coding skills and increase their employability in the tech industry.

What types of projects or tasks can I expect to work on during a full stack development internship?

As a Full Stack Development Intern, you will typically work on both front-end and back-end components of web applications. Common tasks include building user interfaces, developing APIs, integrating databases, and collaborating with designers and senior developers to deliver features. You may also be involved in debugging, testing, and deploying code to ensure product stability. This hands-on experience offers a great opportunity to learn industry-standard tools and workflows, while contributing directly to live projects.

What are the key skills and qualifications needed to thrive as a full stack development intern, and why are they important?

To thrive as a Full Stack Development Intern, you need a solid understanding of both front-end (HTML, CSS, JavaScript) and back-end (such as Node.js, Python, or Java) development, often supported by relevant coursework or projects. Familiarity with tools like Git, databases (e.g., MySQL or MongoDB), and frameworks like React or Express.js is typically expected. Strong problem-solving skills, a willingness to learn, and effective communication set standout interns apart. These skills and qualities are crucial for contributing to projects, adapting to new technologies, and collaborating successfully within a development team.

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

AspectFull Stack Development InternshipFront End Developer Internship
Required SkillsHTML, CSS, JavaScript, backend frameworks, databasesHTML, CSS, JavaScript, UI/UX design
Work EnvironmentBoth frontend and backend tasks, collaborative projectsPrimarily UI/UX, client-side development
Industry UsageWeb development companies, startups, tech firmsWeb agencies, tech startups, digital agencies

Full Stack Development Internships involve working on both frontend and backend development, providing a comprehensive experience in web application creation. Front End Developer Internships focus specifically on user interface and client-side features. Both roles are valuable for gaining industry experience, but Full Stack roles offer broader exposure to the entire development process.

What are the most commonly searched types of Full Stack Development jobs in Ontario?

The most popular types of Full Stack Development jobs in Ontario are:

What are popular job titles related to Full Stack Development Internship jobs in Ontario?

For Full Stack Development Internship jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Full Stack Development Internship jobs in Ontario look for?

The top searched job categories for Full Stack Development Internship jobs in Ontario are:

What cities in Ontario are hiring for Full Stack Development Internship jobs?

Cities in Ontario with the most Full Stack Development Internship job openings:

Full Stack Development Internship jobs near you
Infographic showing various Full Stack Development Internship job openings in Ontario as of August 2026, with employment types broken down into 1% As Needed, 81% Full Time, 15% Part Time, and 3% Contract. Highlights an 92% Physical, 2% Hybrid, and 6% Remote job distribution.

Full Stack Software Engineer, AutoSync

AutoTrader.ca

Toronto, ON

Full-time

Retirement

Re-posted 21 days ago

Key responsibilities

  • Design, build, and modernize large-scale web applications and digital platforms.

  • Develop scalable frontend and backend solutions using modern full-stack technologies, and build and integrate APIs, services, and distributed systems.

  • Own solutions end-to-end, from architecture and development through deployment, monitoring, and operational aspects.

Job description

We are TRADER, a Canadian leader in digital automotive solutions. Our flagship brands - AutoTrader.ca, AutoSync, Dealertrack Canada and CMS - help Canadians buy, sell, and finance vehicles with confidence.
 
As part of AutoScout24 group, Europe's largest online car marketplace, we're shaping the future of automotive retail in Canada and beyond.
 
Learn more at tradercorporation.com.
 
This role will be within the AutoSync team. AutoSync supports over 3,500 dealerships nationwide, delivering cutting-edge software tools to simplify operations, boost marketing, and drive sales.
 

Full Stack Software Engineer

Modern Platform Engineering & AI-First Development

We are looking for a Senior Full Stack Software Engineer to join our organization and help build and modernize large-scale digital platforms and customer-facing applications. This is an opportunity to work on complex modernization initiatives where modern web technologies, cloud-native architectures, and Agentic AI-powered engineering practices are reshaping how software is designed, built, tested, deployed, and operated.

You will be part of a high-performing Agile team delivering scalable solutions while leveraging AI throughout the entire Software Development Lifecycle (SDLC).

What You'll Be Working On

  • Designing, building, and modernizing large-scale web applications and digital platforms
  • Developing scalable frontend and backend solutions using modern full-stack technologies
  • Building and integrating APIs, services, and distributed systems
  • Delivering cloud-native solutions using AWS and modern platform engineering practices
  • Implementing observability, monitoring, reliability, and performance optimization strategies
  • Leveraging AI-assisted development workflows to accelerate delivery and improve quality
  • Driving engineering excellence through architecture, automation, and continuous improvement

What To Expect

  • Own solutions end-to-end with a "You Build It, You Run It" mindset, from architecture and development through deployment, monitoring, performance, reliability, and security.
  • Work in an AI-first engineering environment that leverages Agentic AI for requirements analysis, design reviews, pair programming, code generation, testing, documentation, code reviews, and operational insights.
  • Collaborate within cross-functional Agile teams, contribute to architecture discussions, share knowledge, mentor peers, and help drive engineering standards and continuous improvement.

Must-Have Experience

  • 5+ years building and operating scalable, highly available software systems in production environments
  • Strong understanding of software architecture, distributed systems, design patterns, and clean code principles
  • Expert proficiency with Python/TypeScript, React, Next.js, Node.js, REST APIs, and modern full-stack development practices
  • Experience building high-performance web applications using SSR, component-based architectures, and modern frontend frameworks
  • Strong experience with relational and NoSQL databases such as PostgreSQL, MySQL, MongoDB, and Redis
  • Experience designing and integrating APIs, microservices, and event-driven systems
  • Hands-on experience with AWS, Docker, Terraform, CI/CD pipelines, and modern cloud-native development practices
  • Experience with observability and production operations using tools such as Datadog, New Relic, logging, monitoring, tracing, and incident troubleshooting
  • Strong testing mindset with experience in automated testing, Playwright, unit, integration, API, and end-to-end testing
  • Experience working with Git, GitHub Actions, and modern software delivery workflows
  • Strong ownership mindset with a passion for quality, reliability, performance, and operational excellence
  • Proven experience using AI-assisted development tools such as GitHub Copilot, ChatGPT, Cursor, Claude, or similar platforms to improve engineering productivity
  • Experience leveraging AI throughout the SDLC for code generation, testing, debugging, documentation, code reviews, and technical analysis
  • Familiarity with modern AI frameworks and tooling such as Vercel AI SDK, LangChain, LangGraph, OpenAI SDKs, Anthropic SDKs, MCP (Model Context Protocol), or agent-based development frameworks
  • Passion for emerging AI engineering practices including Agentic AI workflows, AI-powered SDLC automation, multi-agent systems, and intelligent developer tooling

What Success Looks Like - Successful engineers on this team:

  • Deliver high-quality software at scale
  • Leverage AI effectively throughout the SDLC
  • Contribute to architecture and platform evolution
  • Continuously improve engineering practices
  • Help accelerate the organization's transition toward AI-native software development
  • Build reliable, scalable, and maintainable solutions that create measurable business impact

What's In It For You?

We understand that there is life at work and life outside of work. Here are a few benefits we all benefit from that support us to be our creative best. 

 Benefits from Day 1 

  • Gym discounts
  • Employee and Family Assistance program
  • Virtual wellness events
  • Conferences & training budget
  • Regular internal training programs
  • Financial planning with 3% matching Pension  
  • Competitive salary
  • Annual bonus structure 

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