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Freelance Java Back End Developer Jobs in Toronto, ON

Royal Bank of Canada

Java Dev Lead

Toronto, ON

RBC Global Payment Technology team is seeking a Java Backend Lead Developer to join this exciting journey to build the future global payment platform where millions of payments must be processed ...

Pinterest

Software Engineer II, Backend

Toronto, ON

Actively work to improve the developer process and experience in all phases from coding to ... Experience in Python, Java, C++, or Go or another language and a willingness to learn * Experience ...

Atyeti Inc

Sr Java developer

Toronto, ON · On-site

A Java Developer designs, develops, tests, and maintains scalable Java-based applications (web ... Build new and enhance existing Java applications, including back-end services, APIs (RESTful), and ...

Scotiabank

Java Developer

Toronto, ON

Commercial Banking Engineering is seeking a skilled Java Developer with extensive experience in ... The ideal candidate will have a strong foundation in both front-end and back-end technologies, with ...

Scotiabank

Java Developer

Toronto, ON

We are seeking a talented Java Developer with expertise in Spring, Spring Boot, REST APIs, SOAP ... backend technologies. * Design and implement RESTful APIs and SOAP services. * Maintain the ...

Tangentia

Senior Full stack Engineer

Toronto, ON · Hybrid

Deep expertise in either Angular (Frontend) or Node.js/Java (Backend) . Secondary Skill * Basic to ... Strong understanding of REST APIs, OpenAPI specifications, and software design patterns . DevOps * ...

CMiC

Java Developer

Toronto, ON · On-site

CA$90K - CA$110K/yr

We do not use AI to screen, assess, or select applicants Job Overview The Java Developer is ... This role focuses on designing and building scalable backend services and APIs using the Spring ...

Spotify

Backend Engineer - Platform

Toronto, ON

CA$103K - CA$147K/yr

... developer toil by automating workflows and enabling scalable, self-service infrastructure Who You Are * You have experience building backend systems in modern programming languages such as Java * You ...

Ecopia Tech

Backend Engineer

Toronto, ON · Hybrid

We are looking for talented self-starting engineers to join our platform team as backend engineers ... Go, C++, Python, and Java. * Proficient with modern datastores such as Postgres, MongoDB, Redis ...

Ecopia Tech

Backend Engineer

Toronto, ON · On-site

We are looking for talented self-starting engineers to join our platform team as backend engineers ... Go, C++, Python, and Java. * Proficient with modern datastores such as Postgres, MongoDB, Redis ...

Pigment

Senior Backend Software Engineer

Toronto, ON · On-site +1

CA$100K - CA$180K/yr

Solid background in backend software engineering and delivering production-ready systems. - Proven experience designing object oriented software with languages such as C#, Java, C++, Golang, Rust ...

US Mobile

Senior Backend Engineer

Toronto, ON

CA$140K - CA$180K/yr

Develop and maintain RESTful APIs using Java (Spring Boot or related web frameworks) or Python ... Collaborate with Product, QA, and DevOps teams to deliver reliable and scalable features * Write ...

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Freelance Java Back End Developer information

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

To thrive as a Freelance Java Back End Developer, you need strong proficiency in Java, object-oriented programming, RESTful API design, and experience with frameworks like Spring or Hibernate, typically supported by a relevant degree or proven project portfolio. Familiarity with version control systems (such as Git), build tools (like Maven or Gradle), cloud platforms, and continuous integration/continuous deployment (CI/CD) pipelines is highly valued. Outstanding problem-solving abilities, self-motivation, and effective client communication set top freelancers apart. These skills ensure you can deliver robust, maintainable solutions independently and build lasting client relationships.

What are some common challenges faced by Freelance Java Back End Developers when working with multiple clients simultaneously?

Freelance Java Back End Developers often juggle several projects at once, which can present challenges in time management, prioritizing tasks, and aligning with different client expectations. Each client may use distinct tech stacks, communication tools, and development processes, requiring adaptability and strong organizational skills. Clear communication, setting realistic deadlines, and using project management tools can help freelancers maintain quality and meet deliverables across diverse projects.

What does a Freelance Java Back End Developer do?

A Freelance Java Back End Developer is a software professional who specializes in building and maintaining the server-side logic of web applications using the Java programming language. They work independently on a contract basis for various clients, handling tasks such as developing APIs, managing databases, and ensuring the performance and security of the application’s back end. Their responsibilities often include collaborating with front-end developers, integrating third-party services, and troubleshooting server-side issues. Freelancers in this role can work remotely or onsite, offering flexibility to both clients and developers.

What is the difference between Freelance Java Back End Developer vs Freelance Java Software Engineer?

AspectFreelance Java Back End DeveloperFreelance Java Software Engineer
CredentialsJava certifications, experience in backend frameworksJava certifications, broader software development skills
Work EnvironmentRemote, project-based, client-specificRemote or on-site, project or product-focused
Industry UsagePrimarily in backend development projectsInvolved in full software development lifecycle
Search & Comparison IntentFocus on backend Java skillsBroader software development expertise

While both roles involve Java skills, a Freelance Java Back End Developer specializes in server-side development, focusing on backend systems. A Freelance Java Software Engineer may have a broader scope, including full-stack or application development, often requiring additional skills beyond backend work.

What are the most commonly searched types of Java Back End Developer jobs in Toronto, ON? The most popular types of Java Back End Developer jobs in Toronto, ON are:
What are popular job titles related to Freelance Java Back End Developer jobs in Toronto, ON? For Freelance Java Back End Developer jobs in Toronto, ON, the most frequently searched job titles are:
What job categories do people searching Freelance Java Back End Developer jobs in Toronto, ON look for? The top searched job categories for Freelance Java Back End Developer jobs in Toronto, ON are:
Freelance Java Back End Developer jobs near you
Infographic showing various Freelance Java Back End Developer job openings in Toronto, ON as of June 2026, with employment types broken down into 41% Full Time, and 59% Part Time. Highlights an 77% Physical, 5% Hybrid, and 18% Remote job distribution.
Java Full Stack Developer (React)

Java Full Stack Developer (React)

Sapsol Technologies Inc

Mississauga, ON • On-site

Full-time

Posted 28 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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