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Freelance Java Spring Developer Jobs in Ontario (NOW HIRING)

Infoya

CA$80K - CA$90K/yr

We are looking for an experienced Java Developer to design, build, and maintain robust, scalable ... The ideal candidate will have strong expertise in Java, Spring Boot, microservices architecture ...

Tangentia

Java Developer Location: Toronto, ON Experience Required: 5 years Hybrid: 4 days work from office 1 day work from home * 5+ years experience with Springboot/Spring Framework/Java * Experience with ...

StackandCo

They are currently hiring multiple Software Engineers at mid and senior level. \n \n \n \n \n \n You'll be working primarily on the backend with a Java\/Spring Boot stack, dipping in and out of Scala ...

StackandCo

They are currently hiring multiple Software Engineers at mid and senior level. \n \n \n \n \n \n You'll be working primarily on the backend with a Java\/Spring Boot stack, dipping in and out of Scala ...

Tangentia

Role :Back End Developer (Java Springboot) Location : Toronto, ON Backend technical skills ... Strong expertise in Spring framework (Core, Boot, Data, Security, Web, etc.). * Proficiency in Java ...

StackandCo

They are currently hiring multiple Software Engineers at mid and senior level. \n \n \n \n \n \n You'll be working primarily on the backend with a Java\/Spring Boot stack, dipping in and out of Scala ...

StackandCo

Join the scrum team that owns development of standalone service adapters, built with Java & Spring ... Collaboratewith QA engineers to develop testing protocols to identify and correct defects \n

Tangentia

Experience developing with backend technologies such as Java, Spring Boot / Spring Webflux for ... Experience with DevOps , CD/CI tools, GitHub Actions and automated testing tools * Experience ...

Deloitte

Senior Java Developer - Operate

Toronto, ON

CA$72K - CA$138K/yr

This long-term staff augmentation role requires strong expertise in Java and Spring Boot. You will collaborate with other developers, business analysts, and project managers to deliver high-quality ...

hireVouch

Java Tech Lead

Vaughan, ON · On-site

... Engineering, or a related field. Minimum of 7 years of experience in Java development, with at least 3 years in a leadership role. Strong proficiency in Java and Spring Boot. Extensive experience ...

KeyData Cyber

Java Developer (Contract)

Toronto, ON · Remote

CA$40 - CA$48/hr

... Developer to join KeyData Cyber's Delivery Services team. This role is focused on designing ... The ideal candidate will have strong expertise in Java, Spring Boot architecture, SCIM protocol ...

Virtusa

Java Developer

Mississauga, ON

Primary skill Java core 17, Spring Boot, Restful APIs, Microservices Secondary skill JUnit ... Collaborate with other developers, testers, and stakeholders to deliver high-quality software.

Virtusa

Java Developer

Mississauga, ON · On-site

Primary skill Java core 17, Spring Boot, Restful APIs, Microservices Secondary skill JUnit ... Collaborate with other developers, testers, and stakeholders to deliver high-quality software.

Virtusa

Java Developer

Mississauga, ON

Primary skill Java core 17, Spring Boot, Restful APIs, Microservices Secondary skill JUnit ... Collaborate with other developers, testers, and stakeholders to deliver high-quality software.

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Freelance Java Spring Developer information

What are the key skills and qualifications needed to thrive as a Freelance Java Spring Developer, and why are they important?

To thrive as a Freelance Java Spring Developer, you need a solid understanding of Java programming, Spring Framework (including Spring Boot), and experience with RESTful APIs, typically supported by a degree in computer science or relevant certifications. Familiarity with tools like Maven, Git, Docker, and cloud platforms such as AWS or Azure is often required. Strong problem-solving, time management, and client communication skills help you stand out in this role. These competencies ensure you can deliver robust solutions efficiently while managing multiple clients and projects in a dynamic freelance environment.

What are the most common challenges faced by Freelance Java Spring Developers when working with multiple clients simultaneously?

Freelance Java Spring Developers often juggle projects for multiple clients, which can pose challenges such as managing shifting priorities, aligning with different coding standards, and keeping up with varied communication styles. Successfully navigating these requires strong organizational skills, clear project documentation, and proactive communication to set expectations. Additionally, freelancers must stay updated with the latest Spring framework updates to deliver high-quality, maintainable solutions across diverse client environments.

What is a Freelance Java Spring Developer?

A Freelance Java Spring Developer is a self-employed software professional who specializes in building, maintaining, and optimizing applications using the Java programming language and the Spring framework. These developers work on a contract or project basis for various clients, rather than as full-time employees for a single company. Their responsibilities often include designing backend systems, integrating APIs, and ensuring applications are scalable and secure. Freelance Java Spring Developers typically manage their own schedules and may work remotely for clients around the world.

What is the difference between Freelance Java Spring Developer vs Java Backend Developer?

AspectFreelance Java Spring DeveloperJava Backend Developer
CredentialsOften requires Java certifications, Spring certifications, and relevant experienceTypically requires a Java degree or equivalent experience, with or without certifications
Work EnvironmentIndependent, project-based, remote or on-site freelance workFull-time employment in a company or organization, often in an office setting
Employer & Industry UsageClients across various industries hiring for specific projectsEmployers in tech, finance, e-commerce, and other sectors with ongoing backend needs
Search & Comparison IntentLooking for freelance opportunities or contract work in Java Spring developmentSeeking full-time or permanent backend development roles in Java

In summary, Freelance Java Spring Developers typically work independently on short-term projects, requiring specific certifications and flexible work environments. Java Backend Developers usually hold full-time roles within organizations, focusing on ongoing backend system development.

What are popular job titles related to Freelance Java Spring Developer jobs in Ontario? For Freelance Java Spring Developer jobs in Ontario, the most frequently searched job titles are:
What job categories do people searching Freelance Java Spring Developer jobs in Ontario look for? The top searched job categories for Freelance Java Spring Developer jobs in Ontario are:
What cities in Ontario are hiring for Freelance Java Spring Developer jobs? Cities in Ontario with the most Freelance Java Spring Developer job openings:
Freelance Java Spring Developer jobs near you

Sr. Java Developer

Infoya

Hybrid

CA$80K - CA$90K/yr

Full-time

Posted 29 days ago

Job description

About the Job:
We are looking for an experienced Java Developer to design, build, and maintain robust, scalable, and high-performance applications. This role focuses on developing modern e-commerce and enterprise-grade solutions for retail and inter-organization clients. The ideal candidate will have strong expertise in Java, Spring Boot, microservices architecture, RESTful API development, SQL databases, cloud environments, and distributed systems. You will collaborate closely with cross-functional Agile teams to deliver secure, reliable, and performance-optimized applications.

Office Location: Toronto

Employment Type: Permanent

Role Type: New position – current requirement

Work Arrangement: Hybrid

Position Responsibilities:
• Design, develop, and maintain microservices-based applications using Java and Spring Boot.
• Develop and optimize RESTful APIs to ensure high performance, scalability, and security.
• Write clean, efficient, and maintainable code following best practices and design patterns.
• Work with SQL databases such as MySQL and PostgreSQL, and caching technologies such as Redis.
• Optimize database queries and application performance for scalable enterprise systems.
• Deploy, manage, and monitor applications in cloud environments, preferably Google Cloud Platform (GCP).
• Manage the end-to-end release process, including build preparation, automated testing, UAT, stakeholder approvals, Jenkins deployment, and post-deployment validation.
• Conduct unit and integration testing using JUnit and Mockito to ensure application reliability.
• Design, develop, and optimize multithreaded applications for performance and scalability.
• Implement and manage caching strategies using Redis, or similar tools to reduce latency and improve throughput.
• Work on synchronization, concurrency, and performance tuning challenges in distributed systems.
• Collaborate with UI/UX, DevOps, QA, Product, and other cross-functional teams to define and deliver new features.
• Participate in code reviews, mentoring, and knowledge-sharing sessions.
• Troubleshoot production issues, debug complex problems, and support vulnerability handling and application security improvements.


Requirements
Required Qualifications:
• Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent experience.
• 6+ years of hands-on experience developing RESTful APIs and microservices using Java/J2EE.
• Strong experience with the Spring ecosystem, including Spring Boot, Spring MVC, Spring Cloud, Spring Security, and Spring Batch.
• Expertise in Core Java, preferably Java 11 and Java 17.
• Strong knowledge of multithreading, caching, synchronization, concurrency, and design patterns.
• Experience in microservices/API development and migration from monolithic systems.
• Hands-on experience with CI/CD pipelines and tools such as Jenkins, Docker, Kubernetes, Maven, and Gradle.
• Proficiency with SQL and NoSQL databases such as PostgreSQL, MySQL, and Redis.
• Solid knowledge of authentication and authorization mechanisms such as OAuth2 and JWT.
• Experience with cloud platforms, especially Google Cloud Platform (GCP).
• Understanding of distributed systems and API gateways such as Spring Cloud Gateway, Kong, or similar tools.
• Experience with web application security, vulnerability handling, and production issue management.
• Strong debugging, performance optimization, and problem-solving skills.
• Experience using development tools such as IntelliJ, PgAdmin, Postman, and Git.
• Strong communication and collaboration skills.
Preferred Qualifications:
• Experience with hybrid application development.
• Knowledge of Google Cloud Storage (GCS).
• Familiarity with Agile methodologies and collaborative development environments.


Benefits

Salary Range: $85,000 to $90,000 CAD/ year

The final compensation offered will depend on local market conditions and geographic location, as well as job-related factors such as the candidate’s knowledge, skills, qualifications, relevant experience, and education/training. Compensation may also include additional components such as benefits, and/or other incentives, where applicable. In accordance with new employment standards requirements, we retain copies of this job posting and applicant information for three (3) years after the posting is removed. We do not use AI technology; all applications are also reviewed by our recruitment team.

Infoya is an equal opportunity employer committed to diversity and inclusion. We welcome applications from all qualified individuals, regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, aboriginal status, or any other legally protected factors.