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Senior Java Engineer Jobs in Ontario (NOW HIRING)

StackandCo

Senior Java Developer

Galway, NY · On-site

\n \n \n \n \n Our client in Galway are beginning to hire Java Engineers (up to senior level) to help the team build out their globally renowned and ever\-present SAAS offering on a permanent basis.

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 ...

StackandCo

Minimum 5 years experience as a Senior Engineer\n \n * Excellent communication skills \- both written and verbal\n \n * Experience with Java 11\n \n * Experience with TDD and CI\/CD\n \n * Experience ...

StackandCo

Minimum 5 years experience as a Senior Engineer\n \n * Experience with Java 11\n \n * Strong experience with Spring frameworks\n \n * Experience with TDD and CI\/CD\n \n * Experience in financial ...

Citi

Senior Java Developer - Vice President

Mississauga, ON · On-site

CA$120K - CA$170K/yr

The Applications Development Senior Manager (Senior Java Developer - Vice President) is a senior-level position responsible for driving results through hands-on technical leadership and team guidance ...

StackandCo

\n \n \n \n \n Are you a Senior Java Developer with extensive cloud experience looking for your next challenge? Do you have Microservices and TDD? Are you interesting in working in the banking sector?

Localcoin

Senior Java Developer

Etobicoke, ON · Hybrid

CA$120K - CA$140K/yr

As a Senior Java Back-End Developer at Localcoin, you will be responsible for developing and maintaining functional and stable back end applications for our company, ensuring system consistency and ...

StackandCo

You will work on a high performing team of Senior Java Developers where you will be joining the newly formed Cloud Transformation team. There are many Cloud Architects across the team who you will be ...

Citi

Senior Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

We are seeking a highly motivated and experienced Senior Java Developer to join our dynamic team focused on enhancing developer productivity. Our mission is to build and maintain cutting-edge ...

Citi

Senior Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

We are seeking a highly motivated and experienced Senior Java Developer to join our dynamic team focused on enhancing developer productivity. Our mission is to build and maintain cutting-edge ...

StackandCo

... performing team of Senior Java Developers where you will be joining the newly formed Cloud ... Transformation team. There are many Cloud Architects across the team who you will be working ...

Atyeti Inc

Sr Java developer

Toronto, ON

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 ...

Citi

Senior Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

The Senior Java Developer is an intermediate level position responsible for participation in the establishment and implementation of new or revised application systems and programs in coordination ...

StackandCo

You will work on a high performing team of Senior Java Developers where you will be joining the newly formed Cloud Transformation team. There are many Cloud Architects across the team who you will be ...

Citi

Senior Java Developer - Vice President

Mississauga, ON · On-site

CA$120K - CA$170K/yr

We are seeking a highly skilled and experienced Senior Java Engineer to join our dynamic team. The ideal candidate will be a hands-on developer with leadership quality, proficient in modern Java ...

Citi

Senior Java Developer

Mississauga, ON · On-site

CA$94K - CA$141K/yr

We are seeking a highly experienced and motivated Lead Java Developer with 6+ years of industry experience to spearhead the development of robust, scalable, and innovative enterprise applications.

StackandCo

... Senior Java Engineers who have led teams, to work on both the Architecture and Development on multiple key projects. \n \n \n \n \n \n \n This is ideal for someone who enjoys mentoring engineers ...

StackandCo

\n \n \n \n \n We are looking for an experienced Java Developer for a contract position in Dublin. You will be joining a rapidly expanding team who are working on the most cutting edge products. \n \n ...

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Showing results 21-40

All JobsJava Engineer JobsSenior Java Engineer JobsSenior Java Engineer Jobs in Ontario

Senior Java Engineer information

See Ontario salary details

$77.5K

$133.8K

$193K

How much do senior java engineer jobs pay per year?

As of Sep 11, 2026, the average yearly pay for senior java engineer in Ontario is $133,849.00, according to ZipRecruiter salary data. Most workers in this role earn between $113,000.00 and $150,000.00 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.

What are popular job titles related to Senior Java Engineer jobs in Ontario?

For Senior Java Engineer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Senior Java Engineer jobs in Ontario look for?

The top searched job categories for Senior Java Engineer jobs in Ontario are:

What are popular job titles related to Senior Java Engineer jobs in ON?

For Senior Java Engineer jobs in ON, the most frequently searched job titles are:

Senior Java Engineer jobs near you
Infographic showing various Senior 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, with an average salary of $133,849 per year, or $64.4 per hour.

Senior Java Developer (Future Opportunity)

Vaughan, ON • On-site

GFL Environmental
Environmental Quality Programs Administration • 10K+ employees
Learn more about GFL Environmentalexternal

Full-time

Vision, Life, PTO

Re-posted 23 days ago

GFL Environmental rating

6.6

Company rating: 6.6 out of 10

Based on 176 frontline employees who took The Breakroom Quiz

Job description


Our GFL team is expanding, and we're looking for a Senior Java Developer to join us in Vaughan! In this role, you'll play a vital part in designing and implementing high-quality software solutions and ensuring the successful delivery of projects.

Why Join GFL?

GFL Environmental is the only major diversified environmental services company in North America. Our employees, collectively known as 'Team Green,' enjoy numerous benefits: career advancement opportunities, competitive benefits, job stability within an essential services company, and the chance to make a positive impact every day for our customers and communities, Green for Life!

What's in it for You:

  • Comprehensive Benefits Plan including prioritized orthodontics and vision care

  • RRSP matching and profit sharing

  • Employee Assistance Program, life insurance, and more!

  • Paid time off

  • Competitive wages

  • Growth opportunities

Career Path Potential:

Join #TeamGreen and unlock diverse career growth opportunities through professional development, mentorship, and clear paths for internal advancement.

A "Day in the Life" of a Senior Java Developer:

  • Work with a team of developers in designing and implementing software solutions using Java, Spring Boot, and Kotlin, ensuring alignment with best practices and coding standards.

  • Partner with cross-functional teams to translate project requirements into technical specifications and architecture designs that meet business needs.

  • Drive the adoption of new technologies and methodologies, identify areas for improvement, implement solutions and enhance product quality.

  • Oversee code reviews, troubleshoot complex issues, and implement performance optimizations to ensure robust, maintainable solutions.

  • Foster a collaborative and innovative environment within the team, promoting knowledge sharing and professional growth.

Knowledge, Skills and Abilities:

  • Bachelor's degree in computer science or a related field, with minimum 7 years of experience as a Java developer, specializing in Spring Boot within agile environments.

  • Strong proficiency in Kotlin programming language and a solid understanding of software engineering principles, design patterns, and best practices.

  • Excellent problem-solving, critical thinking, and analytical skills, combined with the ability to communicate effectively and work well with diverse teams.

  • Familiarity with AWS cloud platform and containerization technologies (e.g., Docker, Kubernetes) will be nice to have.

Join us and become part of "Team Green" at GFL Environmental, where your skills and dedication will be valued and rewarded. Apply now for this exciting opportunity!

#GFLTalent


We thank you for your interest. Only those selected for an interview will be contacted.

GFL is committed to equal opportunity for all, without regard to race, religion, color, national origin, citizenship, sex, sexual orientation, gender identity, age, veteran status, disability, genetic information, or any other protected characteristic. If you are interested in applying for employment and need special assistance or an accommodation to apply for a posted position, please contactmyworkdayrecruitment@gflenv.com
Please note that GFL does not provide visa sponsorshipfor this position. Valid work authorization in the country where the job is located is required.Successful candidates will be required to provide valid documentation confirming their eligibility to work in the country where the job is located prior to their start date.


This hiring process may utilize machine-based systems to assist in screening and assessing applicants. Final selection decisions are made by our recruitment team.


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