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Intern Java Back End Developer Jobs in Toronto, ON

Citi

Lead Core Backend Developer

Mississauga, ON · On-site

CA$120K - CA$170K/yr

We are looking for a talented and passionate individual to join our Java Server development team ... an engineering mind-set to development work: understand use-cases in details, develop metrics to ...

YO AI Labs

Backend Developer - Remote

Toronto, ON · Remote

$80 - $120/hr

Senior Software Engineer Job Type: Contractor (~15 hours/week) Location: Remote Job Summary We are ... Strong proficiency in Python 3, Java, Rust, C++, or TypeScript . * Strong understanding of ...

Capgemini

Java Full-stack Developer

Mississauga, ON · On-site

CA$86K - CA$127K/yr

The candidate must have Java backend development experience with Core Java Java EE Springboot ... engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data ...

Capgemini

Java Full-stack Developer

Mississauga, ON · On-site

CA$86K - CA$127K/yr

The candidate must have Java backend development experience with Core Java Java EE Springboot ... engineering, all fueled by its market leading capabilities in AI, generative AI, cloud and data ...

Virtusa

Senior Java Developer

Mississauga, ON · On-site

The ideal candidate will have deep expertise in Java and modern backend / frontend technologies, a strong understanding of system design, and the ability to mentor junior engineers while ...

Capco

Staff Java Engineer (Backend)

Toronto, ON · On-site

What You'll Do * Design and build scalable backend applications using Java, Spring Boot ... developer productivity and software quality. Bonus Points For * Experience with domain-driven ...

Virtusa

Senior Java Developer

Mississauga, ON · On-site

The ideal candidate will have deep expertise in Java and modern backend / frontend technologies, a strong understanding of system design, and the ability to mentor junior engineers while ...

Virtusa

Senior Java Developer

Mississauga, ON · On-site

The ideal candidate will have deep expertise in Java and modern backend / frontend technologies, a strong understanding of system design, and the ability to mentor junior engineers while ...

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Intern Java Back End Developer information

What does an intern Java back end developer do?

An Intern Java Back End Developer assists in designing, developing, and maintaining the server-side logic of web applications using the Java programming language. They typically work under the guidance of senior developers to write clean, efficient code, troubleshoot bugs, and learn about frameworks like Spring Boot or Hibernate. Interns may also participate in code reviews, testing, and collaborating with front-end developers to integrate user-facing elements with server-side logic. This role helps interns gain hands-on experience in building scalable and secure back-end systems.

What types of projects and responsibilities can an intern Java back end developer expect during their internship?

As an Intern Java Back End Developer, you can typically expect to work on tasks such as writing and testing server-side code, assisting with database integration, and supporting the development of RESTful APIs. You'll likely collaborate closely with senior developers and other interns during code reviews, debugging sessions, and team meetings. Interns may also be assigned to real-world projects where they can contribute to feature enhancements or bug fixes under supervision, providing valuable hands-on experience in a collaborative, agile environment.

What are the key skills and qualifications needed to thrive as an intern Java back end developer, and why are they important?

To thrive as an Intern Java Back End Developer, you need a solid understanding of Java, object-oriented programming, and database fundamentals, often backed by coursework in computer science or related fields. Familiarity with development tools such as Git, IDEs like IntelliJ or Eclipse, and frameworks like Spring Boot is commonly expected. Strong problem-solving abilities, eagerness to learn, and effective communication skills help you collaborate with team members and adapt quickly. These skills and qualities are crucial for building reliable server-side applications and integrating effectively into a professional development environment.

What is the difference between Intern Java Back End Developer vs Intern Front End Developer?

AspectIntern Java Back End DeveloperIntern Front End Developer
Required SkillsJava, Spring, SQL, REST APIsHTML, CSS, JavaScript, React or Angular
Work EnvironmentServer-side development, database integrationClient-side interface, UI/UX design
Common Industry UsageBackend systems, enterprise applicationsWebsites, mobile app interfaces

Intern Java Back End Developers focus on server-side logic, database management, and API development, while Intern Front End Developers work on the visual and interactive aspects of websites and applications. Both roles often require programming skills and are used in web development environments, but they specialize in different parts of the software stack.

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:

Intern Java Back End Developer jobs near you
Infographic showing various Intern Java Back End Developer job openings in Toronto, ON as of July 2026, with employment types broken down into 100% Full Time. Highlights an 50% In-person, and 50% Remote job distribution.

Senior Backend Developer- .NET

Brampton, ON • On-site

Charger Logistics Inc
51 - 200 employees
Learn more about Charger Logistics Incexternal

Full-time

Medical

Re-posted 11 days ago

Job description

Charger logistics Inc. is a world- class asset-based carrier with locations across North America. With over 20 years of experience providing the best logistics solutions, Charger logistics has transformed into a world-class transport provider and continue to grow.

We are seeking a skilled and performance-minded .Net Core Developer to support and evolve our distributed system of over 100 microservices, built primarily with .NET Core and PostgreSQL. The ideal candidate has deep experience in backend development, service-to-service communication, and infrastructure-level tools like service mesh, and observability platforms. You will work closely with DevOps, QA, and frontend teams to ensure high availability, scalability, and maintainability of our services.

Responsibilities:

  • Design, develop, and optimize high-performance backend microservices using .NET Core/C#.
  • Implement distributed tracing, logging, and metrics for observability using tools like OpenTelemetry, Prometheus, and Grafana.
  • Optimize service-to-service communication and database access to reduce latency and improve throughput.
  • Write scalable SQL queries and optimize PostgreSQL usage, indexing, and connection handling.
  • Contribute to service discovery, dynamic routing, and rollout strategies (e.g., blue/green, canary).
  • Collaborate with QA to improve testability and traceability in a distributed system.
  • Participate in architecture reviews and contribute to best practices for microservices at scale.
  • Maintain CI/CD integration pipelines and ensure backend services deploy reliably.
  • Troubleshoot and debug production issues using logs, traces, metrics, and profiling tools.

Requirements

  • 7+ years of backend development experience, including 2+ years in a microservices environment.
  • Strong hands-on experience with .NET Core (C#) and PostgreSQL.
  • Experience with distributed tracing, metrics, and log aggregation tools (e.g., Jaeger, Prometheus, Loki, Grafana).
  • Deep understanding of REST, gRPC, and asynchronous messaging patterns (e.g., Kafka, RabbitMQ).
  • Familiarity with Kubernetes, Docker, and container-based deployments.
  • Understanding of software performance profiling, benchmarking, and optimization.
  • Strong grasp of service resilience patterns: timeouts, retries, bulkheads, circuit breakers.
  • Excellent problem-solving and debugging skills in large-scale systems.

Preferred Qualifications

  • Experience working with Istio, Consul, or another service mesh.
  • Familiarity with Event Sourcing, CQRS, and DDD patterns.
  • Exposure to Infrastructure as Code tools (Terraform, Helm).
  • Experience with other databases like Redis, MongoDB, or TimescaleDB.
  • Knowledge of cloud platforms like AWS, Azure, or GCP.

Benefits

  • Competitive Salary
  • Healthcare Benefit Package
  • Career Growth