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Sr Java Engineer Jobs in Ontario (NOW HIRING)

StackandCo

\n \n \n Senior Java Engineer \- \/AWS \n \n * Dublin\/ Galway - Remote\/WFH \n * Long Term Contract \n * Negotiable Day Rate \n Leading Fintech\/ Financial Services organisation is looking for a ...

Citi

Senior Java Engineer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

Position Summary We are seeking an experienced Senior Java Engineer with exceptional analytical and problem-solving skills to join our global team. The ideal candidate will be a hands-on Java/J2EE ...

New

Tangentia

Senior Java Developer - Spring Boot & Cloud Experience: 10+ Years Location: Toronto, ON | Hybrid Interview Mode: In person Hybrid Job Summary We are looking for a Senior Java Developer with 10+ years ...

New

Targeted Talent

Senior Java Developer

Toronto, ON · On-site +1

Are you a Senior Java Developer who loves working with cutting-edge technologies and solving complex problems? If so, we have an exciting opportunity for you! We are looking for a Senior Java ...

Targeted Talent

Senior Java Developer

Toronto, ON · On-site +1

Are you a Senior Java Developer who loves working with cutting-edge technologies and solving complex problems? If so, we have an exciting opportunity for you! We are looking for a Senior Java ...

StackandCo

\n \n \n \n \n Our client has a requirement for a highly experienced Java Developer for a contract position in Dublin. You will be joining a highly collaborative team offering you the opportunity to ...

Iris Software Inc.

A leading software consulting firm is seeking a Sr. Java Developer for a hybrid position based in Toronto, ON. Applicants should have a Bachelor's degree in Computer Science or a related field and ...

Virtusa

Senior Java Developer

Mississauga, ON

We are seeking a highly skilled Senior Java Engineer to design, develop, and maintain scalable, high-performance enterprise applications. The ideal candidate will have deep expertise in Java and ...

Virtusa

Senior Java Developer

Mississauga, ON

We are seeking a highly skilled Senior Java Engineer to design, develop, and maintain scalable, high-performance enterprise applications. The ideal candidate will have deep expertise in Java and ...

Virtusa

Senior Java Developer

Mississauga, ON

We are seeking a highly skilled Senior Java Engineer to design, develop, and maintain scalable, high-performance enterprise applications. The ideal candidate will have deep expertise in Java and ...

Iris Software Inc.

Iris's Fortune 100 direct client is looking Sr. Java Developer. Please find below and share me your updated resume at . Location: Toronto, ON (Hybrid, 4 days onsite in a week) * Bachelor's degree in ...

New

Targeted Talent

Senior Java Developer

Kitchener, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

Targeted Talent

Senior Java Developer

Waterloo, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

Targeted Talent

Senior Java Developer

Waterloo, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

Targeted Talent

Senior Java Developer

Ottawa, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

Targeted Talent

Senior Java Developer

Ottawa, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

Targeted Talent

Senior Java Developer

Kitchener, ON · Remote

We are looking for an experienced Senior Java Developer for our client. This is a permanent position that is remote anywhere in Canada! Our client is a global enterprise company with a product that ...

StackandCo

\n \n \n \n \n We are searching for a Senior Java Developer to join a large organisation in the Dublin area. \n \n \n \n \n \n This is a unique opportunity to work with some of the newest tech on the ...

StackandCo

\n \n \n \n \n Senior Java Developer required for a Cybersecurity organisation in Dublin, working ... engineer who is interested in working with some of the newest tech available. \n \n \n \n \n \n ...

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All JobsSr Java Engineer JobsSr Java Engineer Jobs in Ontario

Sr Java Engineer information

What is a Sr Java Engineer?

A Sr Java Engineer is an experienced software developer who specializes in designing, developing, and maintaining complex applications using the Java programming language. They often take on leadership roles within development teams, mentor junior developers, and are responsible for making key architectural decisions. Sr Java Engineers work with frameworks such as Spring and Hibernate, implement best coding practices, and ensure that software projects meet performance, scalability, and security requirements. Their expertise is critical in building reliable enterprise-level applications.

What are the key skills and qualifications needed to thrive as a Sr Java Engineer?

To thrive as a Sr Java Engineer, you need advanced expertise in Java programming, object-oriented design, and experience with frameworks like Spring or Hibernate, usually supported by a degree in computer science or related field. Familiarity with development tools such as Maven, Git, CI/CD pipelines, and cloud platforms like AWS or Azure is typically required. Strong problem-solving abilities, effective communication, and leadership skills set top performers apart in this role. These skills and qualifications are crucial for delivering robust, scalable software solutions and leading technical teams efficiently.

What are some common challenges Sr Java Engineers face when working on large-scale enterprise applications?

Sr Java Engineers often encounter challenges such as managing complex codebases, ensuring high performance under heavy loads, and maintaining robust security standards. Collaborating with cross-functional teams—including DevOps, QA, and front-end developers—is essential for addressing integration issues and streamlining deployments. Staying updated with evolving Java frameworks and best practices is also crucial, as technology stacks in enterprise environments change rapidly. Effective communication and problem-solving skills greatly help in navigating these challenges.

What is the difference between Sr Java Engineer vs Java Developer?

AspectSr Java EngineerJava Developer
Required CredentialsBachelor's in CS or related, often with certifications like Oracle Java CertificationBachelor's in CS or related, similar certifications
Work EnvironmentTeam projects, software development, system architectureApplication coding, feature development, bug fixing
Industry UsageUsed across tech companies, finance, healthcare, and moreCommon in software firms, startups, and enterprise applications

While both roles involve Java programming, Sr Java Engineers typically have more experience, handle complex system design, and mentor junior developers. Java Developers focus on coding and implementing features. The roles often overlap, but the seniority and scope differ.

Sr Java Engineer jobs near you
Infographic showing various Sr Java Engineer job openings in Ontario as of August 2026, with employment types broken down into 89% Full Time, 7% Part Time, and 4% Contract. Highlights an 85% Physical, 5% Hybrid, and 10% Remote job distribution.

Senior Java Software Engineer

Remote

StackandCo
See more jobs at StackandCoexternal

Full-time

Re-posted 1 hour ago

Job description

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Senior Java Engineer \- \/AWS<\/u><\/b><\/span><\/span><\/span><\/span>
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  • Dublin\/ Galway - Remote\/WFH
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  • Long Term Contract
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  • Negotiable Day Rate
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     <\/span><\/span><\/span><\/span>
    <\/p>


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    Leading Fintech\/ Financial Services organisation is looking for a number of experienced Senior Java Engineers to join the team on a long\-term contract with full time WFH\/ Remote options. AWS experience a distinct advance however, strong engineer may still apply as there will be an opportunity to get cloud\/AWS experience.<\/span><\/span><\/span><\/span>
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    Candidates must be based in Ireland with full work rights.<\/span><\/span><\/span><\/span>
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    •  Degree in Computer Science, Engineering, Information Technology or equivalent.
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    • Minimum 6 years of design & development experience.
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    • Desired skillset Java, AWS Cloud, Python.
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    • Expertise with Continuous Integration practices and automated deployment tools.
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    • REST API Test Automation experience in Java and Python development
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    • Experience of working with a distributed team.
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    • Experience with deploying applications to AWS.
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    • Solid Jenkins experience a distinct advantage.
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    • Experience working in financial services desired.
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      \n <\/div><\/span>
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