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Application Development Intern Jobs in Ontario (NOW HIRING)

Lincoln Electric

Software Development Intern

Hamilton, ON · On-site

CA$30/hr

... Intern to join our development team and gain hands-on experience building, testing, and supporting ... NET, SQL, REST APIs, or modern application development frameworks. * Familiarity with Visual Studio ...

New

Lincoln Electric

Software Development Intern

Dundas, ON · On-site

CA$30/hr

... Intern to join our development team and gain hands-on experience building, testing, and supporting ... NET, SQL, REST APIs, or modern application development frameworks. * Familiarity with Visual Studio ...

New

Lincoln Electric

Software Development Intern

Dundas, ON · On-site

CA$30/hr

... Intern to join our development team and gain hands-on experience building, testing, and supporting ... NET, SQL, REST APIs, or modern application development frameworks. * Familiarity with Visual Studio ...

New

Lincoln Electric

Software Development Intern

Hamilton, ON · On-site

CA$30/hr

... Intern to join our development team and gain hands-on experience building, testing, and supporting ... NET, SQL, REST APIs, or modern application development frameworks. * Familiarity with Visual Studio ...

New

DREAM

Intern, Development Accounting

Toronto, ON · On-site

CA$21 - CA$25/hr

Dream is looking for an Intern, Development Accounting (8 month)! We are always looking for the ... The application deadline for this position is Sunday June 7th, 2026, at 11:59pm. Who are you? Don't ...

ESAB

Co Op Intern

Mississauga, ON

Under the guidance of a Professional Engineer and assigned mentor, the intern will gain exposure to ... engagement, application recommendations, and solution development * Assist withresearch and ...

New

Hitachi

ITV - Intern (Fall 2026, 12-16 Month)

Toronto, ON · Hybrid

CA$23 - CA$30/hr

Adhere to and promote standards for test development best practices * Collaborates and participates ... If your application is of interest, we will be in contact. Please do not hesitate to discover more ...

ShyftLabs

AI Engineer Intern

Toronto, ON · Hybrid

CA$20 - CA$30/hr

We are looking for an AI Engineer Intern interested in building production-ready AI agents and ... evaluation, and application development. What You'll Be Doing * Build and improve agent ...

Believeco Partners Ltd

You'll have a genuine hand in shaping how learning and development works here. Your work will span ... submit your application. We welcome creative thinkers and people who bring diverse lived ...

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 ... development throughout the SDLC. Responsibilities include: * Study and understand the application ...

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Application Development Intern information

See Ontario salary details

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How much do application development intern jobs pay per hour?

As of Aug 16, 2026, the average hourly pay for application development intern in Ontario is $32.83, according to ZipRecruiter salary data. Most workers in this role earn between $14.66 and $51.44 per hour, depending on experience, location, and employer.

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

To thrive as an Application Development Intern, you need a solid understanding of programming languages (such as Java, Python, or JavaScript), software development fundamentals, and often a pursuit of a computer science or related degree. Familiarity with integrated development environments (IDEs), version control systems like Git, and basic database management is typically required. Strong problem-solving skills, attention to detail, and effective communication make candidates stand out in collaborative tech environments. These skills are crucial for contributing to development projects, learning quickly, and supporting the overall success of software teams.

What does an application development intern do?

An Application Development Intern assists in designing, coding, testing, and maintaining software applications under the supervision of experienced developers. Their responsibilities often include writing code, debugging issues, participating in team meetings, and learning about the software development lifecycle. Interns also have the opportunity to gain hands-on experience with various programming languages, development tools, and industry best practices. This role is typically aimed at students or recent graduates looking to build their skills and gain real-world experience in application development.

What types of projects do application development interns typically work on, and how much autonomy can I expect in this role?

As an Application Development Intern, you'll usually work on real-world projects such as developing new features, fixing bugs, or contributing to internal tools under the guidance of experienced developers. While you'll be given tasks that match your skill level, many teams encourage interns to take ownership of small projects or modules, providing a balance of support and autonomy. You'll often collaborate closely with software engineers, product managers, and QA testers, gaining hands-on experience in the full software development lifecycle. This structure helps you build practical skills and prepares you for potential full-time roles after graduation.

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

The most popular types of Application Development jobs in Ontario are:

What cities in Ontario are hiring for Application Development Intern jobs?

Cities in Ontario with the most Application Development Intern job openings:

Application Development Intern jobs near you

Software Development Intern

Lincoln Electric

Hamilton, ON • On-site

CA$30/hr

Internship

Posted yesterday

New

Lincoln Electric rating

7.7

Company rating: 7.7 out of 10

Based on 49 frontline employees who took The Breakroom Quiz

231st of 490 rated machine equipment manufacturers

Job description

Lincoln Electric is a high-performance industrial machinery and technology leader who helps customers manufacture and maintain vital equipment and infrastructure. Lincoln Electric’s innovative solutions enable higher quality and productivity across a variety of processes including welding, cutting, brazing, machining, process automation, and field repair. The Company leverages proprietary technologies and expertise in materials science, power electronics, automation, and intelligent software to help customers build better and achieve resilience in their operations. Headquartered in Cleveland, Ohio, Lincoln Electric is the essential ‘Linc’ that keeps the economy running. The Company operates 71 manufacturing and automation facilities across 20 countries and serves customers in over 160 countries. For more information about Lincoln Electric and its products and services, visit the Company’s website at https://www.lincolnelectric.com.

Location: Hamilton 
Req ID: 29631 

Hourly Rate: $30

​

Role Summary

We are looking for a Software Engineering Intern to join our development team and gain hands-on experience building, testing, and supporting software applications. This role offers exposure to modern software development practices, troubleshooting real-world issues, and collaborating with experienced engineers on production software systems.

Key Responsibilities
  • Assist in developing, testing, and maintaining software applications and services.
  • Write and debug code under the guidance of senior engineers.
  • Investigate software issues using logs, debugging tools, and code analysis.
  • Support troubleshooting and root cause analysis of defects and production issues.
  • Contribute to software testing, validation, and documentation.
  • Participate in code reviews and team discussions.
  • Work with cross-functional teams to support software releases and enhancements.
  • Learn and apply software engineering best practices, including source control and agile development methodologies.
Required Qualifications
  • Currently pursuing or recently completed a degree or diploma in Software Engineering, Computer Science, Computer Engineering, Mechatronics, or a related field.
  • Experience with object-oriented programming through coursework, projects, internships, co-op placements, or personal projects.
  • Preferred: C# programming experience.
  • Also accepted: Python, Java, C++, JavaScript/TypeScript, or other object-oriented languages.
  • Basic understanding of software design, debugging, and testing principles.
  • Strong analytical and problem-solving skills.
  • Ability to investigate issues and learn from logs, error messages, and troubleshooting tools.
  • Familiarity with Git or other source control systems.
Preferred Qualifications
  • Experience with .NET, SQL, REST APIs, or modern application development frameworks.
  • Familiarity with Visual Studio, VS Code, Azure DevOps, GitHub, or similar development tools.
  • Experience with academic, open-source, internship, co-op, or personal software projects.
  • Familiarity with AI-assisted development tools such as GitHub Copilot, Microsoft Copilot, Cursor, ChatGPT, or similar tools.
  • Interest in applying AI tools to improve coding, testing, debugging, documentation, and productivity.
  • Exposure to automation, robotics, manufacturing systems, IoT, or hardware/software integration is a plus but not required.
What You'll Learn
  • Professional software development practices and workflows.
  • Troubleshooting, debugging, and root cause analysis techniques.
  • Application design, testing, and deployment processes.
  • Collaboration within a cross-functional engineering team.
  • Effective use of modern AI-assisted development tools.
  • Real-world software engineering and production support experience.
Success Profile
  • Curious, proactive, and eager to learn.
  • Strong problem-solving and analytical thinking skills.
  • Comfortable working in a technical team environment.
  • Takes ownership of tasks and follows through on solutions.
  • Communicates effectively and asks thoughtful questions.
  • Demonstrates a passion for building high-quality software.

Lincoln Electric is an Equal Opportunity Employer. We are committed to promoting equal employment opportunity for applicants, without regard to their race, color, national origin, religion, sex (including pregnancy, childbirth, or related medical conditions, including, but not limited to, lactation), sexual orientation, gender identity, age, veteran status, disability, genetic information, and any other category protected by federal, state, or local law.

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