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Junior Java Developer Intern Jobs in Ontario (NOW HIRING)

Citi

Low latency Senior Java Developer

Mississauga, ON

CA$120K - CA$170K/yr

Mentor junior developers and analysts. Must Have Key Skills and Experience Required * 8+ years relevant experience. * Extensive Core Java 17 version & above experience with strong knowledge of data ...

New

Localcoin

Java Backend Developer

Etobicoke, ON · Hybrid

CA$100K - CA$135K/yr

As a Java Back-End Developer at Localcoin, you will be responsible for developing and maintaining ... Guide and mentor junior developers, fostering a culture of learning, best practices, and technical ...

Purolator

Technology Developer

Mississauga, ON

Mentor junior and intermediate developers, share knowledge and promote consistent engineering ... Strong Java and Spring Boot development experience, including REST APIs, Maven, JSON and service ...

Purolator

Technology Developer

Mississauga, ON

Mentor junior and intermediate developers, share knowledge and promote consistent engineering ... Strong Java and Spring Boot development experience, including REST APIs, Maven, JSON and service ...

Targeted Talent

Java Technical Lead

Kitchener, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

Targeted Talent

Java Technical Lead

Ottawa, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

Targeted Talent

Java Technical Lead

Kitchener, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

Targeted Talent

Java Technical Lead

Waterloo, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

Targeted Talent

Java Technical Lead

Ottawa, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

Targeted Talent

Java Technical Lead

Waterloo, ON · Remote

Prior experience mentoring junior developers; performing code reviews, contributing to architectural decision-making, and * Experience working with Java , including great working knowledge of Java8 ...

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Junior Java Developer Intern information

What is the difference between Junior Java Developer Intern vs Junior Java Developer?

AspectJunior Java Developer InternJunior Java Developer
Required CredentialsBasic understanding of Java, coursework, or related internship experienceProven Java skills, possibly some certifications or coursework completed
Work EnvironmentInternship programs, learning-focused, entry-level projectsFull-time role, more responsibility, involved in ongoing projects
Employer & Industry UsageInternship positions in tech companies, startups, or software firmsEntry-level full-time positions in similar industries
Search & Comparison IntentUnderstanding internship differences, entry-level opportunitiesCareer progression, job responsibilities, skill requirements

The main difference between a Junior Java Developer Intern and a Junior Java Developer lies in experience and responsibilities. Interns are typically students or recent graduates gaining practical experience, while Junior Developers are full-time employees with more responsibilities and ongoing projects. Internships serve as a stepping stone toward a full developer role, which requires more skills and commitment.

What does a Junior Java Developer Intern do?

A Junior Java Developer Intern assists in the development, testing, and maintenance of Java-based applications under the supervision of senior developers. Their responsibilities typically include writing simple code, debugging software, participating in team meetings, and learning best practices in software development. The intern gains hands-on experience with Java technologies, tools, and frameworks while contributing to real-world projects. This role is designed to help interns build foundational programming skills and understand the software development lifecycle.

What are the key skills and qualifications needed to thrive as a Junior Java Developer Intern, and why are they important?

To thrive as a Junior Java Developer Intern, you need a solid understanding of Java programming, basic knowledge of object-oriented design, and a relevant degree or coursework in computer science or software engineering. Familiarity with IDEs like Eclipse or IntelliJ IDEA, version control systems such as Git, and introductory experience with build tools like Maven is typical. Strong problem-solving, eagerness to learn, and effective communication skills help interns collaborate and adapt in a team environment. These skills and qualities are important because they enable rapid learning, effective contribution to projects, and smooth integration into development teams.

What types of projects and tasks can I expect to work on as a Junior Java Developer Intern?

As a Junior Java Developer Intern, you can expect to assist in developing, testing, and debugging Java applications under the guidance of senior team members. Your daily tasks may include writing code, fixing bugs, participating in code reviews, and collaborating with other developers and departments such as QA or DevOps. Interns often get exposure to real-world projects that contribute to the organization's products or services, providing valuable experience with tools like version control systems and agile methodologies. This hands-on involvement is designed to help you build both technical and teamwork skills in a professional setting.
What are popular job titles related to Junior Java Developer Intern jobs in Ontario? For Junior Java Developer Intern jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Junior Java Developer Intern jobs in Ontario look for? The top searched job categories for Junior Java Developer Intern jobs in Ontario are:
What cities in Ontario are hiring for Junior Java Developer Intern jobs? Cities in Ontario with the most Junior Java Developer Intern job openings:
Junior Java Developer Intern jobs near you
Infographic showing various Junior Java Developer Intern job openings in Ontario as of August 2026, with employment types broken down into 72% Full Time, 14% Part Time, and 14% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Low latency Senior Java Developer

Citi

Mississauga, ON

CA$120K - CA$170K/yr

Full-time

Posted yesterday

New

Citibank rating

8.3

Company rating: 8.3 out of 10

Based on 177 frontline employees who took The Breakroom Quiz

39th of 171 rated banks

Job description

Overview

Citi is a leading global bank with a vast international presence, serving millions of customers worldwide. We offer a comprehensive suite of financial services, empowering our clients through innovative solutions and access to capital.

What We Do / The Team

We are a global team responsible for a markets-wide strategic risk management platform. We're looking for a skilled Java Developer to enhance our platform and integrate it with trading systems across markets.

Role Overview/What You'll Do

  • Collaborate with management to integrate functions and identify system enhancements.

  • Solve critical issues by evaluating complex business and system processes.

  • Apply your Java expertise and ensure architectural alignment.

  • Develop coding standards for testing, debugging, and implementation.

  • Understand the integration of business areas, architecture, and infrastructure.

  • Analyze problems and create innovative solutions.

  • Mentor junior developers and analysts.

Must Have Key Skills and Experience Required

  • 8+ years relevant experience.

  • Extensive Core Java 17 version & above experience with strong knowledge of data structures, design patterns, and SOLID principles.

  • Hands-on Microservices experience

  • Experience with messaging systems like Kafka and Solace.

  • Proficiency in Spring framework and cloud technologies (Docker/Kubernetes/OpenShift).

  • Familiarity with Jira, Bitbucket, and Gradle.

  • Experience with document databases (MongoDB).

  • Experience developing multi-threaded, distributed systems.

  • Experience with testing frameworks like JUnit and Cucumber.

  • Solid understanding of the FIX protocol.

Beneficial Skills and Experience

  • Experience with Chronicle framework or low-latency programming.

  • Experience with time-series databases like KDB.

  • Experience with Equities trading OMS.

  • Strong communication and problem-solving skills.

  • Ability to work in a globally distributed team.

This job description provides a high-level review of the types of work performed. Other job-related duties may be assigned as required.

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Job Family Group: Technology

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Job Family:Applications Development

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Time Type:Full time

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Primary Location Full Time Salary Range:$120,800.00 - $170,800.00

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Most Relevant Skills Please see the requirements listed above.

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Other Relevant Skills For complementary skills, please see above and/or contact the recruiter.

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Automated Processing and AI

We use automated processing, including artificial intelligence, for our legitimate business interests (or our reasonable and appropriate business purposes) to identify and align the candidate's skills and abilities with a specific job opening. Additionally, if you so choose, or consent, we can match your skills and abilities to other suitable roles at Citi.

Importantly, all our hiring processes and decisions, including determining your suitability for a role, are conducted, checked, and decided by individuals. Our automated processing and AI do not involve relying on automatic or autonomous decision-making. Please refer to any Jurisdictional Considerations, with specific provisions for your country (where relevant) for further details.

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This job opening is for an existing job vacancy.

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Citi is an equal opportunity employer, and qualified candidates will receive consideration without regard to their race, color, religion, sex, sexual orientation, gender identity, national origin, disability, status as a protected veteran, or any other characteristic protected by law.

 

If you are a person with a disability and need a reasonable accommodation to use our search tools and/or apply for a career opportunity review Accessibility at Citi.
View Citi’s EEO Policy Statement and the Know Your Rights poster.

What Citibank employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom

Citigroup Inc logo

About Citigroup Inc

Sourced by ZipRecruiter

We live in an increasingly complex world. Companies these days are either born global or are going global at record speed. Business and geopolitics are forging an entirely new dynamic and consumers now expect financial services to be a seamless part of their digital lives. Citi is a bank that’s uniquely positioned for this moment. Through our vast global network and our on-the-ground expertise, we can connect the dots, anticipate change and empathize the needs of our clients and customers in ways that other banks simply cannot. Citi's mission is to serve as a trusted partner to our clients by responsibly providing financial services that enable growth and economic progress. We have set expectations for how we must act to bring our mission to life. These expectations are at the heart of our Leadership Principles – we take ownership, we deliver with pride and we succeed together.

Industry

Banking and credit intermediation

Company size

5,001 - 10,000 Employees

Headquarters location

New York City, NY, US

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