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Senior Java Engineer Jobs in Oakville, ON (NOW HIRING)

Collabera Canada Inc

Be Seen First

Senior Java Engineer (React)

Toronto, ON · On-site

CA$70 - CA$120/hr

Title: Senior Java Engineer Type: 6-month contract + opportunity to extend Location: 1 Queen Street East, Toronto Work Model: Hybrid (4 days on-site) Day-to-Day Responsibilities * Refactor and ...

Targeted Talent

Senior Java Developer

Toronto, ON · On-site +1

$91K - $120K/yr

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

$91K - $120K/yr

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 ...

Virtusa

Senior Java Developer

Mississauga, ON · On-site

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 ...

Poly Services Group

Senior Java Developer

Toronto, ON · On-site

SENIOR JAVA SOFTWARE DEVELOPER Location: Toronto, ON (uptown) Industry: Technology Type: Permanent WHAT IS THE OPPORTUNITY. Our client is an 18-year-old SaaS developer and recognized leader of ...

Atyeti Inc

Sr Java developer

Toronto, ON · On-site

A Java Developer designs, develops, tests, and maintains scalable Java-based applications (web, enterprise, mobile) by writing clean code, collaborating with teams, and integrating with databases and ...

Collabera Canada Inc

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Senior Java Developer (Capital Market/Terraform)

Toronto, ON · On-site

CA$48 - CA$120/hr

Senior Java Developer (Capital Market and Front Office/Backoffice/Cache Management/ Terraform) Duration: 6+ months (Contract) Possibility of Extension Location: Toronto - Hybrid Pay Rate Range: $50 ...

Td

Senior Java Developer, TD Securities

Toronto, ON

CA$102K - CA$125K/yr

About This Role We are looking for a savvy Senior Java Developer to join our growing Prime Technology team. The hire will be responsible for designing, building, maintaining, and supporting ...

Konrad

Senior Java Developer

Toronto, ON · Hybrid

CA$120K - CA$145K/yr

About The Role As a Full Stack Java Developer you'll be tasked with working on web application development in Java and Spring Boot. Working within the software development team, your duties will ...

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All JobsJava Engineer JobsSenior Java Engineer JobsSenior Java Engineer Jobs in Oakville, ON

Senior Java Engineer information

See Oakville, ON salary details

$70.2K

$121.3K

$174.9K

How much do senior java engineer jobs pay per year?

As of Aug 21, 2026, the average yearly pay for senior java engineer in Oakville, ON is $121,299.00, according to ZipRecruiter salary data. Most workers in this role earn between $102,405.00 and $135,936.00 per year, depending on experience, location, and employer.

What is a senior Java engineer?

Senior Java Engineers are experienced software developers who specialize in designing, developing, and maintaining applications using the Java programming language. They often lead development teams, architect solutions, and ensure that software meets both technical and business requirements. Their responsibilities also include code reviews, mentoring junior developers, and optimizing application performance. Typically, they have several years of experience and a deep understanding of Java frameworks and best practices.

What are the key skills and qualifications needed to thrive as a senior Java engineer?

To thrive as a Senior Java Engineer, you need advanced proficiency in Java programming, strong knowledge of software design patterns, and a degree in computer science or related field. Experience with frameworks like Spring, Hibernate, build tools such as Maven or Gradle, and familiarity with cloud platforms and CI/CD systems are typically required. Excellent problem-solving abilities, leadership, and effective communication help you guide teams and collaborate with stakeholders. These skills are crucial for delivering robust, scalable software solutions and mentoring junior engineers in complex development environments.

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

Senior Java Engineers often encounter challenges such as managing complex codebases, ensuring application scalability, and maintaining high performance under heavy loads. They are also responsible for implementing robust security practices and integrating new technologies without disrupting existing systems. Effective collaboration with cross-functional teams and mentoring junior developers are crucial aspects of the role, as these responsibilities help maintain code quality and project momentum.

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

AspectSenior Java EngineerJava Developer
Required CredentialsBachelor's in Computer Science, Java certifications (e.g., Oracle Certified Professional)Bachelor's in Computer Science or related field, Java certifications optional
Work EnvironmentDesigning, developing, and maintaining complex Java applications, often in team leadership rolesDeveloping Java applications, focusing on coding and implementation
Industry UsageUsed across finance, tech, and enterprise sectors for large-scale projectsCommonly employed in software development firms, startups, and tech companies

While both roles involve Java programming, Senior Java Engineers typically handle complex system design, mentorship, and project leadership, whereas Java Developers focus more on coding and implementing features. The senior role often requires more experience and certifications, with a broader scope of responsibilities.

Senior Java Engineer jobs near you

Senior Java Engineer (React)

Collabera Canada Inc

Toronto, ON • On-site

CA$70 - CA$120/hr

Contractor

Medical, Dental, Vision, Life, Retirement, PTO

Posted 23 days ago

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Job description

Title: Senior Java Engineer

Type: 6-month contract + opportunity to extend

Location: 1 Queen Street East, Toronto

Work Model: Hybrid (4 days on-site)

Day-to-Day Responsibilities

  • Refactor and decompose a large monolithic application into microservices.
  • Design, develop, and maintain backend services using Java and Spring Boot.
  • Contribute to architecture discussions, service boundaries, and technical design decisions.
  • Develop and deploy cloud-native applications in AWS.
  • Build and enhance React-based UI components
  • Collaborate with developers, business analysts, and Capital Markets stakeholders.
  • Ensure systems are highly performant, secure, resilient, and scalable.
  • Participate in code reviews and engineering best practices.

Must-Have Skills

Backend Development

  • 10+ years of enterprise Java development experience.
  • Advanced Spring Boot expertise.
  • Proven experience building and refactoring microservices architectures.
  • Experience designing and developing distributed, high-performance systems.

Frontend Development

  • Hands-on React development experience.
  • Comfortable contributing to frontend features and UI enhancements

Cloud & DevOps

  • Cloud- AWS experience (preferred)

Capital Markets Experience (if they don't have capital markets, should at least come from financial services/ retail banking).

  • Public Markets experience.
  • FX experience.
  • Equities experience.
  • Derivatives experience.
  • Understanding of front-office trading workflows.

Soft Skills

  • Strong analytical and problem-solving abilities.
  • Ability to work independently in a fast-paced engineering environment.
  • Strong communication and collaboration skills.

Nice-to-Haves

  • Experience with portfolio management or trading platforms.
  • AWS cloud-native services experience.
  • Mockito and automated testing frameworks.
  • Exposure to AI/ML concepts.
  • Experience working in highly regulated financial environments.