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Full Stack Java Developer Jobs in Ontario (NOW HIRING)

Citi

Senior Java Full Stack Developer

Mississauga, ON · On-site

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

Td

Sr. Java Full Stack Developer, TD Securities

Toronto, ON · On-site

CA$126K - CA$164K/yr

About The Role As a Senior Java Full Stack Developer , demonstrate ownership, accountability, and long-term thinking by delivering secure, reliable, maintainable, and business-aligned technology ...

Konrad

Java Developer

Toronto, ON · Hybrid

CA$90K - CA$125K/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 ...

United Airlines

Java Full Stack Developer

Toronto, ON · On-site

... experience in full-stack development with a strong portfolio showcasing successful projects ... Working knowledge of the Java programming language and supporting frameworks such as Spring, Spring ...

United Airlines

Java Full Stack Developer

Toronto, ON · On-site

... experience in full-stack development with a strong portfolio showcasing successful projects ... Working knowledge of the Java programming language and supporting frameworks such as Spring, Spring ...

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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Full Stack Java Developer information

What is a full stack Java developer?

A Full Stack Java Developer is a software professional skilled in both front-end and back-end development using Java technologies. They are proficient in building complete web applications, handling everything from designing user interfaces and user experiences to managing databases and server-side logic. Typically, they work with frameworks like Spring Boot for the backend and technologies like HTML, CSS, and JavaScript for the frontend, ensuring seamless integration between the two. Full Stack Java Developers are valued for their versatility and ability to manage all aspects of the software development process.

What is a full stack Java developer?

A full stack Java developer is a web developer that uses the Java language in the development of the entire technology stack of a web-based application. The job duties of a full stack Java developer are to create both front-end components, such as user interfaces and back-end components, such as application code and databases. As a full stack Java developer, you must understand how the entire technology stack functions as a whole and have deep expertise of each component. Java is a computer programming language that has become one of the most popular for web application development.

What are the typical challenges full stack Java developers face when working on cross-functional teams?

Full Stack Java Developers often collaborate with front-end designers, back-end engineers, and QA specialists, which can lead to challenges in aligning technical requirements, timelines, and coding standards. Navigating different priorities and communication styles is common, especially when integrating new features or resolving bugs that span both client and server sides. Success in this environment requires flexibility, proactive communication, and a willingness to quickly adapt to shifting project needs or technologies.

What are the key skills and qualifications needed to thrive as a full stack Java developer, and why are they important?

To thrive as a Full Stack Java Developer, you need strong proficiency in Java, front-end frameworks (such as Angular or React), back-end technologies, and a solid understanding of databases, often supported by a degree in computer science or a related field. Familiarity with version control systems like Git, build tools such as Maven or Gradle, and knowledge of Spring Boot or similar frameworks are typically required, along with relevant certifications. Effective communication, problem-solving abilities, and adaptability are standout soft skills in this role. These skills and qualities are essential to deliver robust, user-friendly applications and to collaborate efficiently across the software development lifecycle.

What is the difference between Full Stack Java Developer vs Backend Java Developer?

AspectFull Stack Java DeveloperBackend Java Developer
Required SkillsJava, front-end (HTML, CSS, JavaScript), frameworks like Angular/React, databasesJava, server-side frameworks (Spring, Hibernate), databases, APIs
Work EnvironmentDevelops both client and server-side applications, often in agile teamsFocuses on server-side logic, APIs, and database integration
CertificationsJava certifications, full stack development coursesJava certifications, backend-specific courses
Industry UsageStartups, tech companies, full stack rolesEnterprise applications, backend services, API development

Full Stack Java Developers work on both front-end and back-end components, requiring a broader skill set. Backend Java Developers focus solely on server-side logic and database integration. The choice depends on your interest in full application development versus specialized backend work.

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Full Stack Java Developer jobs near you
Infographic showing various Full Stack Java Developer job openings in Ontario as of September 2026, with employment types broken down into 95% Full Time, and 5% Contract. Highlights an 76% In-person, 10% Hybrid, and 14% Remote job distribution.

Java Full Stack Developer (React)

Mississauga, ON • On-site

Sapsol Technologies Inc
IT Services • 11 - 50 employees
Learn more about Sapsol Technologies Incexternal

Full-time

Re-posted 11 days ago

Job description

We are seeking a talented Java Full Stack Developer with strong expertise in backend development using Java, Spring Boot, and Microservices, along with frontend experience in React.js. The ideal candidate will be responsible for building scalable, high-performance applications and ensuring seamless integration between frontend and backend systems.

Key Responsibilities
  • Develop and maintain backend services using Java and Spring Boot
  • Design and implement Microservices architecture
  • Build responsive and dynamic user interfaces using React.js and modern JavaScript (ES6+)
  • Integrate frontend applications with backend services via RESTful APIs
  • Manage application state using Redux or similar libraries
  • Collaborate with cross-functional teams including UI/UX, QA, and DevOps
  • Optimize applications for performance, scalability, and security
  • Participate in code reviews, testing, and deployment processes
  • Troubleshoot and resolve technical issues across the stack
Required Skills
  • Strong experience in Core Java and Spring Boot
  • Hands-on experience with Microservices architecture
  • Proficiency in React.js, Redux, and ES6+ JavaScript
  • Experience with API integration and UI development
  • Strong understanding of frontend-backend interaction
  • Familiarity with HTML5, CSS3
  • Experience with SQL databases (MySQL, PostgreSQL)
Preferred Skills
  • Experience with AWS/Azure cloud platforms
  • Knowledge of Docker, Kubernetes
  • Familiarity with CI/CD tools (Jenkins, GitHub Actions)
  • Understanding of authentication mechanisms (JWT, OAuth)
Education
  • Bachelor's degree in Computer Science, IT, or related field (or equivalent experience)

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