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Junior Java Developer Jobs in Oakville, ON (NOW HIRING)

Lead code reviews, establish engineering standards, and mentor junior engineers. * Participate in ... Deep expertise in Java/Kotlin. * Understanding in Python. * Strong frontend skills with React and ...

Senior Java Developer

Mississauga, ON · On-site +1

CA$129K - CA$194K/yr

Primary Programming Languages: Java, Bash shell and Coreutils, Perl, Python, Go, Rust * OS/Technologies: Linux SuSE Operating system * Experience in DICOM and HL7 * An undergraduate or college degree ...

Lead Java Full Stack Developer

Mississauga, ON · On-site

CA$120K - CA$170K/yr

Lead Java Developer Role Summary: We are looking for a Java Full-Stack Engineer to design, build, and support modern web applications. This role spans front-end development (Angular or React) and ...

We're currently looking for a high caliber professional to join our team as Senior Java Developer, Vice President. Cross Asset Margin technology teams actively develop and enhance set of strategic ...

* The Senior Engineer in Production Management will be responsible for the development and overall ... The candidate must have Java backend development experience with Core Java Java EE Springboot ...

Java Full-stack Developer

Mississauga, ON · On-site

CA$86K - CA$127K/yr

* The Senior Engineer in Production Management will be responsible for the development and overall ... The candidate must have Java backend development experience with Core Java Java EE Springboot ...

Oracle Certified Java Developer certification will be an asset. * Technical Knowledge of event driven architecture (Kafka, Kafka connectors, Kafka brokers) * 3-5 years of working experience in the ...

... engineering excellence and innovation. Work with Modern Technology: Utilize a modern tech stack, including Java, Kubernetes, Docker, and Kafka, to build cutting-edge financial technology solutions.

Full Stack Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

... in programming in Java, JavaScript or React, Hands on experience of building RESTful APIs using popular frameworks like Spring Experience of following TDD and clean code principles Proficiency with ...

Showing results 41-60

Junior Java Developer information

What is a junior Java developer?

Junior Java Developers are entry-level software engineers who specialize in building and maintaining applications using the Java programming language. They typically work under the supervision of more experienced developers and are responsible for writing code, debugging, and participating in code reviews. Their tasks may also include testing software, learning new frameworks, and assisting with the design and implementation of features. Junior Java Developers usually have foundational knowledge of Java and related technologies, and they are eager to develop their skills through hands-on experience.

What does a junior Java developer do?

Junior Java developers are entry-level programmers who are part of a team of coders and developers. They work on both front-end and back-end codes to build an application. Being a junior Java developer requires extensive knowledge of coding and the program language JavaScript to develop and troubleshoot products. As a junior Java developer, you run tests to pinpoint errors, migrate code and data, and ensure the program is integrated with other company developments.

What are the key skills and qualifications needed to thrive as a junior Java developer?

A Junior Java Developer should have a solid understanding of Java programming, object-oriented principles, and basic software development concepts, often supported by a relevant degree or coding bootcamp. Familiarity with tools such as IntelliJ IDEA or Eclipse, version control systems like Git, and frameworks like Spring Boot is typically expected. Strong problem-solving abilities, attention to detail, and effective teamwork are important soft skills in this role. These competencies enable efficient code development, smooth collaboration, and the ability to quickly adapt to new technologies and project requirements.

What are some common challenges a junior Java developer might face during their first year, and how can they overcome them?

Junior Java Developers often encounter challenges such as understanding large codebases, adapting to agile development processes, and managing task priorities. To overcome these hurdles, it’s helpful to proactively seek mentorship from senior developers, regularly review documentation, and participate in code reviews. Effective communication with team members also accelerates learning and helps clarify requirements or technical uncertainties. Embracing continuous learning through online resources and hands-on projects will further strengthen your skills and confidence.

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

AspectJunior Java DeveloperJava Developer
Required Experience0-2 years2+ years
CertificationsOptional, entry-level certificationsOptional, advanced certifications
Work EnvironmentSupportive, learning-focused teamsProject-driven, independent roles
ResponsibilitiesAssist in coding, bug fixing, learning frameworksDesign, develop, maintain Java applications

The main difference between a Junior Java Developer and a Java Developer lies in experience, responsibilities, and independence. Junior Java Developers are typically entry-level, focusing on learning and supporting tasks, while Java Developers have more experience and handle complex development projects independently.

How much do junior Java developers make?

Junior Java developers typically earn between $50,000 and $80,000 annually, depending on location, industry, and experience. Entry-level roles often require knowledge of Java, object-oriented programming, and development tools like Eclipse or IntelliJ IDEA.

Is a Junior Java Developer still in demand?

Junior Java Developers remain in demand due to the widespread use of Java in enterprise applications, web development, and Android app creation. Employers seek candidates with foundational Java skills, knowledge of frameworks like Spring, and familiarity with version control tools such as Git. Continuous learning and certifications can enhance job prospects in this field.

What cities near Oakville, ON are hiring for Junior Java Developer jobs?

Cities near Oakville, ON with the most Junior Java Developer job openings:

Infographic showing various Junior Java Developer job openings in Oakville, ON as of August 2026, with employment types broken down into 100% Full Time. Highlights an 50% In-person, and 50% Remote job distribution.

Java Back end Developer

Toronto, ON • On-site

United Airlines
Aviation • 10K+ employees

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 22 days ago


Key responsibilities

  • Design and implement full-stack solutions across multiple technologies including Java/Kotlin, Python, React, PostgreSQL, and Snowflake.

  • Lead ETL pipeline development, optimization, and ensure reliable data flow.

  • Architect and build scalable backend services and modern frontend applications.


United Airlines rating

7.9

Company rating: 7.9 out of 10

Based on 343 frontline employees who took The Breakroom Quiz

8th of 26 rated airlines


Job description

Choosing Capgemini means choosing a company where you will be empowered to shape your career in the way you'd like, where you'll be supported and inspired bya collaborative community of colleagues around the world, and where you'll be able to reimagine what's possible. Join us and help the world's leading organizationsunlock the value of technology and build a more sustainable, more inclusive world.

Job Description:
What Will You Do?
  • Design and implement full-stack solutions across Python, Java/Kotlin, React, PostgreSQL, and Snowflake.
  • Lead ETL pipeline development and optimization, ensuring data flows efficiently and reliably.
  • Architect and build scalable backend services and modern frontend applications.
  • Champion AI/LLM integration and prompt engineering best practices across the team.
  • Drive adoption of best-in-class testing frameworks, DevOps practices, and SDLC discipline.
  • Lead code reviews, establish engineering standards, and mentor junior engineers.
  • Participate in security and architectural design reviews.
  • Contribute to GitHub-based development workflows and CI/CD pipeline improvements.
  • Troubleshoot production issues and drive reliability improvements.
What Do You Need to Succeed? Must-Have
  • 5+ years of software development experience across multiple languages/frameworks.
  • Deep expertise in Java/Kotlin.
  • Understanding in Python.
  • Strong frontend skills with React and modern JavaScript.
  • Database experience with PostgreSQL and Snowflake (or similar data warehouses).
  • Hands-on experience with ETL tools and data pipeline development.
  • Proficiency with DevOps tools (GitHub, CI/CD, containerization).
  • Strong understanding of testing frameworks and SDLC best practices.
  • Experience with API design and microservices architecture.
  • Proven mentoring and leadership capabilities.
Nice to Have
  • AI/LLM and prompt engineering experience.
  • Security testing tools experience (Checkmarx, NexusIQ, or similar).
  • Experience with cloud platforms (AWS, Azure, GCP).

The base compensation range for this role in the posted location is: 75,000 to 90,000

Capgemini provides compensation range information in accordance with applicable national, state, provincial, and local pay transparency laws. The base compensation range listed for this position reflects the minimum and maximum target compensation Capgemini, in good faith, believes it may pay for the role at the time of this posting. This range may be subject to change as permitted by law.

The actual compensation offered to any candidate may fall outside of the posted range and will be determined based on multiple factors legally permitted in the applicable jurisdiction.

These may include, but are not limited to: Geographic location, Education and qualifications, Certifications and licenses, Relevant experience and skills, Seniority and performance, Market and business consideration, Internal pay equity.

It is not typical for candidates to be hired at or near the top of the posted compensation range.

In addition to base salary, this role may be eligible for additional compensation such as variable incentives, bonuses, or commissions, depending on the position and applicable laws.

Capgemini offers a comprehensive, non-negotiable benefits package to all regular, full-time employees. In the U.S. and Canada, available benefits are determined by local policy and eligibility and may include: 

  • Paid time off based on employee grade (A-F), defined by policy: Vacation: 12-25 days, depending on grade, Company paid holidays, Personal Days, Sick Leave
  • Medical, dental, and vision coverage (or provincial healthcare coordination in Canada)
  • Retirement savings plans (e.g., 401(k) in the U.S., RRSP in Canada)
  • Life and disability insurance
  • Employee assistance programs
  • Other benefits as provided by local policy and eligibility

Important Notice: Compensation (including bonuses, commissions, or other forms of incentive pay) is not considered earned, vested, or payable until it becomes due under the terms of applicable plans or agreements and is subject to Capgemini's discretion, consistent with applicable laws. The Company reserves the right to amend or withdraw compensation programs at any time, within the limits of applicable legislation.

Disclaimers

Capgemini is an Equal Opportunity Employer encouraging inclusion in the workplace. Capgemini also participates in the Partnership Accreditation in Indigenous Relations (PAIR) program which supports meaningful engagement with Indigenous communities across Canada by promoting fairness, accessibility, inclusion and respect.  We value the rich cultural heritage and contributions of Indigenous Peoples and actively work to create a welcoming and respectful environment. All qualified applicants will receive consideration for employment without regard to race, national origin, gender identity/expression, age, religion, disability, sexual orientation, genetics, veteran status, marital status or any other characteristic protected by law.

This is a general description of the Duties, Responsibilities and Qualifications required for this position. Physical, mental, sensory or environmental demands may be referenced in an attempt to communicate the manner in which this position traditionally is performed. Whenever necessary to provide individuals with disabilities an equal employment opportunity, Capgemini will consider reasonable accommodations that might involve varying job requirements and/or changing the way this job is performed, provided that such accommodation does not pose an undue hardship. Capgemini is committed to providing reasonable accommodation during our recruitment process. If you need assistance or accommodation, please reach out to your recruiting contact.

Please be aware that Capgemini may capture your image (video or screenshot) during the interview process and that image may be used for verification, including during the hiring and onboarding process.

Click the following link for more information on your rights as an Applicant in the United States.  http://www.capgemini.com/resources/equal-employment-opportunity-is-the-law

Capgemini is a global business and technology transformation partner, helping organizations to accelerate their dual transition to a digital and sustainable world, while creating tangible impact for enterprises and society. It is a responsible and diverse group of 340,000 team members in more than 50 countries. With its strong over 55-year heritage, Capgemini is trusted by its clients to unlock the value of technology to address the entire breadth of their business needs. It delivers end-to-end services and solutions leveraging strengths from strategy and design to engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data, combined with its deep industry expertise and partner ecosystem.


What United Airlines employees say

Pay

Benefits

Hours and flexibility

Workplace

Get the full story on Breakroom


United Airlines logo

About United Airlines

Sourced by ZipRecruiter

United Airlines is embarking on an exciting journey to become the best airline in aviation history. Our purpose, "Connecting People, Uniting the World," extends beyond transportation, emphasizing our commitment to uplift and create opportunities in the places we serve. With a global presence and diverse workforce, we value inclusivity and are dedicated to hiring tens of thousands of individuals across various roles. Our comprehensive benefits package, including perks like space available travel, parental leave, and 401k, aims to support your well-being and growth.

Industry

Aviation

Company size

10,000+ Employees

Headquarters location

Chicago, IL, US

Year founded

1926

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