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Junior Backend Software Engineer Jobs in Ontario

Sitero LLC

Senior Software Engineer

Mississauga, ON · On-site +1

Design and develop full-stack features using Python/FastAPI or Django (backend) and React ... Mentor junior developers and support onboarding of new team members Technology Stack Category ...

Okta

Staff Software Engineer - Backend

Toronto, ON

Staff Software Engineer- Backend , Device Identity We seek a dynamic and influential Staff Software Engineer to join our Device Authenticators engineering team. The ideal candidate will leverage ...

YO AI Labs

Software Engineer - Remote

Toronto, ON · Remote

Work on challenging software engineering tasks across backend, full-stack, infrastructure, and systems-related projects. * Review, debug, improve, and explain code across different technical ...

Curinos Inc

Senior Software Engineer

Toronto, ON · On-site

CA$130K - CA$140K/yr

The ideal candidate is proficient across the stack: front-end, back-end, and cloud infrastructure ... Provide guidance and coaching to junior engineers, helping them grow their skills and contributing ...

Parallelz

Software Engineer

Toronto, ON · On-site

You are a strong all-around engineer who has spent the last few years operating across backend ... as a junior pair you direct and verify, not a passenger. Requirements This is a hands-on ...

Parallelz

Software Engineer

Toronto, ON · On-site

You are a strong all-around engineer who has spent the last few years operating across backend ... as a junior pair you direct and verify, not a passenger. Requirements This is a hands-on ...

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Junior Backend Software Engineer information

What does a junior backend software engineer do?

A Junior Backend Software Engineer is responsible for developing and maintaining the server-side logic and databases that power web applications. They typically work with programming languages like Python, Java, or Node.js, and collaborate closely with frontend developers, QA engineers, and product teams to ensure seamless data flow and application performance. Their tasks often include writing APIs, managing databases, debugging code, and learning best practices for code efficiency and security. As juniors, they are also expected to learn from senior engineers and gradually take on more complex responsibilities as they gain experience.

What are some common challenges faced by junior backend software engineers during their first year on the job?

Junior Backend Software Engineers often encounter challenges such as understanding and adapting to large, existing codebases, navigating code review processes, and learning to write efficient, maintainable code that meets team standards. Collaboration with frontend developers and DevOps teams can also be new, requiring effective communication to ensure seamless integration. Overcoming these challenges typically involves asking questions, seeking mentorship, and dedicating time to continuous learning and documentation review.

What are the key skills and qualifications needed to thrive as a junior backend software engineer, and why are they important?

A Junior Backend Software Engineer should have a solid understanding of programming languages like Java, Python, or Node.js, as well as knowledge of data structures, algorithms, and basic database management. Familiarity with frameworks (such as Spring or Django), RESTful APIs, version control systems like Git, and cloud platforms is often required. Strong problem-solving abilities, attention to detail, and effective communication help junior engineers collaborate and learn within development teams. These skills ensure code quality, system reliability, and growth in a fast-paced technical environment.

What are the most commonly searched types of Backend Software Engineer jobs in Ontario?

The most popular types of Backend Software Engineer jobs in Ontario are:

What are popular job titles related to Junior Backend Software Engineer jobs in Ontario?

For Junior Backend Software Engineer jobs in Ontario, the most frequently searched job titles are:

What job categories do people searching Junior Backend Software Engineer jobs in Ontario look for?

The top searched job categories for Junior Backend Software Engineer jobs in Ontario are:

What cities in Ontario are hiring for Junior Backend Software Engineer jobs?

Cities in Ontario with the most Junior Backend Software Engineer job openings:

Junior Backend Software Engineer jobs near you
Infographic showing various Junior Backend Software Engineer job openings in Ontario as of August 2026, with employment types broken down into 1% As Needed, 80% Full Time, 16% Part Time, and 3% Contract. Highlights an 87% Physical, 4% Hybrid, and 9% Remote job distribution.

Software Engineer II/ Software Developer (Backend)

PlayStation Global

Waterloo, ON • On-site

Full-time

Posted 19 days ago

Job description

Software Engineer II, BackendWaterloo, ON

Build what's next for players.

We're a startup inside Sony PlayStation: fast-moving, experimental, and highly ambitious, while backed by the scale, resources, and trust of Sony Interactive Entertainment.

We're building new mobile and web experiences that help gamers connect, discover, and play together in better ways. This is a rare opportunity to build at startup speed and deliver significant impact inside one of the largest gaming companies in the world.

We are seeking a Software Backend Engineer to help design, build, and operate the services and data systems that power our new consumer experiences.

Responsibilities

  • Design, build, test, deploy, and operate reliable backend services and APIs for consumer applications across mobile and web.
  • Contribute to backend architecture and technical decisions related to scalability, availability, consistency, latency, security, and cost.
  • Design and maintain data models using relational and non-relational databases, caching systems, and asynchronous processing patterns.
  • Build and maintain GraphQL and REST APIs that support mobile and web client experiences.
  • Monitor and improve service performance, reliability, observability, and operational health.
  • Partner with product managers, designers, and client engineers to translate product requirements into practical technical solutions.
  • Participate in code reviews and share technical knowledge with other members of the engineering team.
     

 Requirements

  • 3+ years of professional software development experience building backend services or applications.
  • BS/MS degree in Computer Science, Software Engineering, or equivalent practical experience.
  • Proficiency in server-side development (Node.js with TypeScript preferred).
  • Experience with relational and non-relational databases, including data modelling, indexing, transactions, and performance optimization (PostgreSQL preferred).
  • Experience designing, building, or integrating GraphQL and REST APIs.
  • Familiarity with caching, message queues, event streams, or asynchronous processing systems.
  • Understanding of cloud infrastructure, containerized services, CI/CD pipelines, and infrastructure as code.
  • Experience working with production systems on AWS or another major cloud platform.
Bonus
  • Experience building social, community, gaming, or other consumer products.
  • Understanding of real-time communication systems, including messaging, presence, notifications, and activity feeds.
  • Experience working with social graphs, recommendation systems, content discovery services, or personalization platforms.
  • Familiarity with trust and safety, content moderation, abuse prevention, or user-reporting systems.
  • Previous experience at an early-stage startup or on a zero-to-one product team.

Apply