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

CARFAX

Senior Software Engineer

London, ON

Provide guidance and share your expertise with junior and senior team members. * Engage with ... Strong background in Java development and object-oriented programming principles. * Tech ...

CARFAX

Senior Software Engineer

London, ON

CA$92.60K - CA$136K/yr

Provide guidance and share your expertise with junior and senior team members. * Engage with ... Strong background in Java development and object-oriented programming principles. * Tech ...

CARFAX

Senior Software Engineer

London, ON

CA$92.60K - CA$136K/yr

Provide guidance and share your expertise with junior and senior team members. * Engage with ... Strong background in Java development and object-oriented programming principles. * Tech ...

e-EMPHASYS TECHNOLOGIES INC

Software Engineer - 2

London, ON · On-site

CA$80K - CA$100K/yr

Position Overview Software Engineer (Full Stack) We are looking for a Software Engineer to join our ... Build backend services using Java and Spring (on-prem and Azure cloud environments) * Develop and ...

ZTR

Embedded Software Test and Validation

London, ON · On-site

Mentor junior and intermediate testers in best practices Who Are You? * 4+ years of experience ... Experience in at least one programming language used in embedded computing (Python, Java or ...

ZTR

Controls Software Test and Validation

London, ON · On-site

Mentor junior and intermediate testers in best practices Who Are You? * 3+ years of experience ... Experience in at least one programming language used in embedded computing (Python, Java or ...

Td

Software Engineer I (Host/Mainframe)

London, ON · On-site

CA$69.70K - CA$98.40K/yr

Strong academic background (e.g., computer science, engineering) * Graduate degree nice to have ... Experience in JAVA, REST API, Oracle, SQL Server Database * Knowledge on Event Hub, Kafka or ...

PSD

Fullstack Software Developer

London, ON · Remote

As we continue to grow, were looking for a Fullstack Software Developer to fill an existing vacancy and join our ITteam in a fully remote role based in Ontario. If youre passionate about technology ...

PSD Citywide

Fullstack Software Developer

London, ON · On-site +1

As we continue to grow, we're looking for a Fullstack Software Developer to fill an existing vacancy and join our ITteam in a fully remote role based in Ontario. If you're passionate about technology ...

Td

Associate Software Engineer - L3 Support

London, ON

CA$59.50K - CA$84K/yr

Develop new components as required for engineering programs and projects within assigned area and ... Java, Spring, SQL, Linux experience would be preferred * Experience with Dynatrace, Jira ...

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Junior Java Developer information

See London, ON salary details

$36.7K

$67K

$98.4K

How much do junior java developer jobs pay per year?

As of May 29, 2026, the average yearly pay for junior java developer in London, ON is $67,029.00, according to ZipRecruiter salary data. Most workers in this role earn between $54,379.00 and $76,821.00 per year, depending on experience, location, and employer.

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, and why are they important?

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 are Junior Java Developers?

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.

Will AI replace Java devs?

AI is unlikely to fully replace Java developers, as their role involves complex problem-solving, system design, and understanding business needs that AI cannot fully replicate. Instead, AI tools can assist Java developers by automating repetitive tasks and improving productivity, making their skills more valuable. Continuous learning and adapting to new technologies remain important for Java developers to stay relevant in the evolving tech landscape.

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.

More about Junior Java Developer jobs
What are the most commonly searched types of Java Developer jobs in London, ON? The most popular types of Java Developer jobs in London, ON are:
What cities near London, ON are hiring for Junior Java Developer jobs? Cities near London, ON with the most Junior Java Developer job openings:
Junior Java Developer jobs near you
Infographic showing various Junior Java Developer job openings in London, ON as of May 2026, with employment types broken down into 1% Internship, 86% Full Time, 10% Part Time, 1% Temporary, and 2% Contract. Highlights an 79% Physical, 9% Hybrid, and 12% Remote job distribution, with an average salary of $67,029 per year, or $32.2 per hour.
Junior Software Developer (Python)

Junior Software Developer (Python)

Squarepoint Capital

London, ON

Other

Posted 22 days ago

Job description

Please only apply to the one job you feel best fits your skillset and experience. If our team feels you are better suited for another role, we will reach out about the alternate opportunity.

Position Overview:

At Squarepoint we use Python to build a great deal of the software needed to solve crucial problems every day. You will work on a wide range of systems that fuel our trading success including, but not limited to, core tooling and frameworks, data pipelines used to feed predictive models in research and trading, and software products used worldwide by traders and researchers.

You will collaborate with experienced software developers and quant researchers to enable the continued growth of our investment business, solving problems at scale, and gaining a unique chance to learn from some of the most talented individuals in the industry.

Required Qualifications:  

  • Degree in Computer Science, Computer Engineering, Applied Math, Physics, Quantitative Finance, or Financial Engineering/MFE
  • Up to 4 years experience in a relevant role such as software or quant development, or similar
  • Experience with Python, git, and Linux
  • Excellent written and verbal communication skills
  • Eagerness to continuously learn new technologies and develop with us
  • Ability to work well in a fast-paced environment

Nice to Have:

  • Experience with any of C++, Rust, KDB+/q, JavaScript/TypeScript/React
  • Experience with database management systems and related technologies such as SQL
  • Experience working in an investment or financial business is useful

Apply