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Application Developer Intern Jobs in Mississauga, ON

Perseus Group

Software Developer Intern

Markham, ON

CA$22.50 - CA$27.50/hr

The Software Developer Intern works in a Scrum team to build high-performing, resilient, and ... Study and understand the application's functionality, workflow, and design. * Work with the team to ...

Powered by Pioneer

Developer Relations Intern

Toronto, ON · Remote

CA$8 - CA$16/hr

Role Summary We are looking for a passionate Developer Relations Intern to join our global DevRel ... in application materials based on available information. These tools assist our recruitment team ...

Cargill

Engineering Intern

Guelph, ON · On-site

Please complete your application as soon as possible. Please note, applications will be reviewed on an ongoing basis with the possibility of filling the role before the application deadline. Please ...

Cargill

Engineering Intern

Guelph, ON · On-site

Please complete your application as soon as possible. Please note, applications will be reviewed on ... As an intern, youll have access to a wide variety of programs to support you and help you succeed

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All JobsApplication Developer Intern JobsApplication Developer Intern Jobs in Mississauga, ON

Application Developer Intern information

What does an application developer intern do?

An Application Developer Intern assists in designing, coding, testing, and maintaining software applications under the supervision of experienced developers. They typically work on specific projects, learn how to use programming languages and development tools, and help troubleshoot software issues. This role provides hands-on experience in the software development lifecycle and prepares interns for a full-time developer position in the future.

What types of projects and technologies do application developer interns typically work with during their internship?

As an Application Developer Intern, you can expect to collaborate on real-world projects such as building web or mobile applications, automating business processes, or enhancing existing software. Interns often use languages and frameworks like Java, Python, JavaScript, React, or .NET, depending on the company's tech stack. You'll work alongside experienced developers, participate in code reviews, and contribute to team meetings, gaining exposure to agile development practices and version control systems like Git. This hands-on experience is designed to help you build technical skills, understand industry workflows, and prepare for a full-time developer role.

What are the key skills and qualifications needed to thrive as an application developer intern, and why are they important?

To thrive as an Application Developer Intern, you generally need a solid understanding of programming languages (such as Java, Python, or JavaScript), basic software development principles, and enrollment in or completion of a relevant degree program. Familiarity with development tools like Git, code editors (e.g., Visual Studio Code), and exposure to version control or continuous integration systems is typical. Strong problem-solving abilities, effective communication, and a willingness to learn help interns stand out in team environments. These skills and qualities enable interns to contribute meaningfully, adapt quickly, and grow within dynamic software development teams.

What is the difference between Application Developer Intern vs Software Engineer Intern?

AspectApplication Developer InternSoftware Engineer Intern
Required CredentialsTypically pursuing or recent graduate in Computer Science or related fieldSimilar educational background, often pursuing or recent graduate in Computer Science or related field
Work EnvironmentInternship focused on developing, testing, and maintaining applicationsInternship involving software design, coding, and system development
Employer & Industry UsageUsed in tech companies, startups, and software firmsCommon in tech companies, consulting firms, and large corporations
Search & Comparison IntentOften compared for internship roles in application developmentOften compared for broader software development internship roles

The Application Developer Intern and Software Engineer Intern roles share similar educational backgrounds and work environments, focusing on software development. However, Application Developer Interns typically concentrate on creating and maintaining specific applications, while Software Engineer Interns may work on a broader range of software projects, including system architecture and backend development.

What are the most commonly searched types of Application Developer jobs in Mississauga, ON?

The most popular types of Application Developer jobs in Mississauga, ON are:

What are popular job titles related to Application Developer Intern jobs in Mississauga, ON?

For Application Developer Intern jobs in Mississauga, ON, the most frequently searched job titles are:

What job categories do people searching Application Developer Intern jobs in Mississauga, ON look for?

The top searched job categories for Application Developer Intern jobs in Mississauga, ON are:

What cities near Mississauga, ON are hiring for Application Developer Intern jobs?

Cities near Mississauga, ON with the most Application Developer Intern job openings:

Application Developer Intern jobs near you
Infographic showing various Application Developer Intern job openings in Mississauga, ON as of August 2026, with employment types broken down into 79% Full Time, 17% Part Time, and 4% Contract. Highlights an 88% Physical, 4% Hybrid, and 8% Remote job distribution.

Software Developer Intern

Perseus Group

Markham, ON

CA$22.50 - CA$27.50/hr

Full-time

Re-posted 17 days ago

Job description

THE POSITION

The successful Software Developer Intern works in our Markham, Ontario office and reports to our Solutions Architect for the homebuilding industry's leading-edge enterprise software product.

The Software Developer Intern works in a Scrum team to build high-performing, resilient, and manageable web-based ERP software for homebuilders, using AI-assisted development throughout the SDLC. Responsibilities include:

  • Study and understand the application's functionality, workflow, and design.
  • Work with the team to build a new product module end-to-end using AI-assisted development tools under architectural guidance.
  • Assist in setting up, testing, and maintaining MCP servers/connectors that power AI-assisted development for the team, including configuration, documentation, and usage governance.
  • Expand automated test coverage - unit, integration, and end-to-end (Playwright) - and wire tests into Azure DevOps CI/CD pipelines.
  • Author and refine reusable AI context: rules files, prompts, and agentic workflows for repeatable development and review tasks.
  • Evaluate the quality and reliability of AI-assisted output against real coding tasks; iterate to improve.
  • Document processes and provide recommendations for scaling AI-assisted development and automation across the team.

QUALIFICATIONS AND SKILLS

  • Able to work from the Markham, Ontario office.
  • Understanding of software requirements and the software development lifecycle.
  • Experience building multi-tier, distributed web solutions with an emphasis on Responsive Design.
  • Understanding of development best practices in a multi-developer team using a shared code repository (Git): branching, pull requests, code review.
  • Hands-on experience in full-stack development:
    • HTML5, TypeScript, JavaScript, stylesheets (Angular an asset)
    • .NET
    • SQL query
    • Object-Oriented Design
    • Test-Driven Development; ability to write unit and integration tests
  • Familiarity with AI coding assistants and prompt engineering (asset).
  • Exposure to test automation frameworks such as Playwright (asset).
  • Exposure to Azure DevOps (Repos, Pipelines) (asset).

Salary Range (Ontario & BC Only):

The estimated base salary range for this role is CAD$22.50 - CAD$27.50 per hour. We include salary ranges in job postings only where required by applicable pay transparency laws, based on the jurisdictions in which the role may be performed. The posted range is a good faith estimate and reflects factors that are subject to change. Final offer amounts may vary based on job-related factors, including work location, candidate experience and expertise, and other relevant considerations.We recognize the value and importance of diversity and inclusion in our communities and in the workplace. We celebrate diversity and one of our goals as an employer is to create an inclusive work environment for all employees. We are an equal opportunity employer and do not discriminate against any employee or applicant because of race, religion, sex, sexual orientation including gender identity or expression, pregnancy, national origin, age, marital status, veteran status, disability status, or any other category or characteristic protected by law.Applicants with disabilities who would like to require a reasonable accommodation related to any part of the application process may contact us at Perseus_HR@constellationhbs.com.#NX

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