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Junior Python Backend Developer Jobs in Ontario (NOW HIRING)

Releady

Senior Backend Engineer (SQL/Python)

Toronto, ON · On-site +1

CA$135/hr

OVERVIEW We are seeking a Senior Backend Engineer with strong expertise in Python and API development to design and build scalable, data-driven backend systems. This role focuses on developing secure ...

Releady

Senior Backend Engineer (SQL/Python)

Toronto, ON · On-site +1

CA$135/hr

OVERVIEW We are seeking a Senior Backend Engineer with strong expertise in Python and API development to design and build scalable, data-driven backend systems. This role focuses on developing secure ...

Varicent

Lead Backend Developer

Toronto, ON

CA$104K - CA$130K/yr

... Python and/or TypeScript (or similar), building APIs, services, and data pipelines Experience ... Engineering, or related field (or equivalent practical experience) For this role, the estimated ...

Varicent

Staff Backend Developer

Toronto, ON

... in Python and/or TypeScript (or similar), building APIs, services, and data pipelines • ... Engineering, or related field (or equivalent practical experience) For this role, the estimated ...

Varicent

Lead Backend Developer

Toronto, ON

... in Python and/or TypeScript (or similar), building APIs, services, and data pipelines • ... Engineering, or related field (or equivalent practical experience) For this role, the estimated ...

StackandCo

Python Developer

Galway, NY · On-site

... the backend systems, including the core functionality, databases and APIs. \n \n \n \n \n \n As ... junior\-senior applicants and for the right senior, there may be the opportunity to progress to ...

Varicent

Staff Backend Developer

Toronto, ON

CA$104K - CA$130K/yr

... Python and/or TypeScript (or similar), building APIs, services, and data pipelines Experience ... Engineering, or related field (or equivalent practical experience) For this role, the estimated ...

Atyeti Inc

Sr Python Developer

Toronto, ON · On-site

Work with cloud platforms (e.g., AWS, Azure, GCP) to deploy and manage backend services. * Optimize ... Perform code reviews and mentor junior developers. * Integrate with third-party APIs and external ...

StackandCo

... the backend systems, including the core functionality, databases and APIs. \n \n \n \n \n \n As ... junior\-senior applicants and for the right senior, there may be the opportunity to progress to ...

Carbonhound

Senior Back-end Developer

Toronto, ON · Hybrid

The Role We're looking for a Senior Backend Developer to join our 10-person team to drive ... These data systems are currently written in node.js and python to support early team competency but ...

Carbonhound

Senior Back-end Developer

Toronto, ON · On-site

CA$120K - CA$140K/yr

The Role We're looking for a Senior Backend Developer to join our 10-person team to drive ... These data systems are currently written in node.js and python to support early team competency but ...

CIBC US

Consultant, Back End Developer

Toronto, ON · On-site +1

Proficient with Bash, PowerShell and optionally Python.. Familiarity with mTLS, JWT, and secure API ... Programming Interface (API), Back-End Development, Design, Java (Programming Language), Python ...

CIBC

Consultant, Back End Developer

Toronto, ON · On-site +1

Proficient with Bash, PowerShell and optionally Python.. Familiarity with mTLS, JWT, and secure API ... Programming Interface (API), Back-End Development, Design, Java (Programming Language), Python ...

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Junior Python Backend Developer information

What does a Junior Python Backend Developer do?

A Junior Python Backend Developer is responsible for writing server-side logic using the Python programming language. They work on building, maintaining, and optimizing the backend of web applications, often collaborating with frontend developers and other team members. Their daily tasks may include developing APIs, managing databases, debugging code, and ensuring the application runs smoothly and efficiently. As junior developers, they are also expected to learn best practices, follow coding standards, and continuously improve their skills.

What are the key skills and qualifications needed to thrive as a Junior Python Backend Developer, and why are they important?

To thrive as a Junior Python Backend Developer, you need proficiency in Python programming, understanding of backend frameworks like Django or Flask, and a solid grasp of databases and RESTful API design, typically supported by a relevant degree or coding bootcamp experience. Familiarity with version control systems like Git, cloud platforms, and containerization tools such as Docker is often expected. Strong problem-solving skills, eagerness to learn, and effective teamwork make someone stand out in this role. These skills and qualities are crucial for building reliable backend systems, collaborating with teams, and adapting to evolving technical requirements.

What types of projects and tasks can a Junior Python Backend Developer expect to work on during their first year?

As a Junior Python Backend Developer, you can expect to work on tasks such as building and maintaining RESTful APIs, writing automated tests, fixing bugs, and contributing to database design. You'll likely start with smaller components or features, collaborating closely with senior developers and front-end teams to ensure smooth data flow and application performance. Over time, you'll gain exposure to code reviews, deployment processes, and may gradually take on more complex assignments as you build your expertise and confidence.
What are the most commonly searched types of Python Backend Developer jobs in Ontario? The most popular types of Python Backend Developer jobs in Ontario are:
Junior Python Backend Developer jobs near you
Infographic showing various Junior Python Backend Developer job openings in Ontario as of June 2026, with employment types broken down into 68% Full Time, 22% Part Time, 5% Temporary, and 5% Contract. Highlights an 87% Physical, 5% Hybrid, and 8% Remote job distribution.

Senior Backend Engineer (SQL/Python)

Releady

Toronto, ON • On-site, Remote

CA$135/hr

Contractor

Posted 28 days ago

Job description

OVERVIEW

We are seeking a Senior Backend Engineer with strong expertise in Python and API development to design and build scalable, data-driven backend systems. This role focuses on developing secure RESTful APIs, building ETL frameworks, and integrating data across cloud-native environments.

The ideal candidate has hands-on experience with FastAPI (or similar Python frameworks), strong SQL proficiency, and experience working with analytics, reporting, or data-heavy applications in enterprise environments.

Contract: 9-12 months, potential to extend / convert
Fully remote but must be able to come into the office in financial district (Toronto) for meetings at times
8am - 5pm
Hourly Rate: $135 (incorporated); $117 (T4)
RESPONSIBILITIES

  • Design, develop, and maintain scalable RESTful APIs using Python (FastAPI preferred).

  • Build and support ETL/data ingestion frameworks to process structured and semi-structured data.

  • Integrate with internal and external APIs, data platforms, and cloud storage solutions.

  • Write efficient, optimized SQL queries for analytics and reporting use cases.

  • Implement secure authentication and authorization mechanisms (e.g., OAuth2, JWT).

  • Deploy and maintain services in containerized cloud environments (Docker/Kubernetes).

  • Collaborate with cross-functional teams including data engineers, frontend developers, and product stakeholders.

  • Contribute to CI/CD pipelines, testing strategies, and code quality standards.

  • Optimize backend performance, reliability, and scalability for high-volume data systems.

QUALIFICATIONS

  • 5+ years of backend development experience.

  • Strong proficiency in Python and modern API frameworks (FastAPI, Flask, or similar).

  • Solid experience with SQL and relational databases (PostgreSQL, SQL Server, Snowflake, etc.).

  • Experience building ETL pipelines or data processing workflows.

  • Hands-on experience with cloud platforms (AWS, Azure, or GCP).

  • Experience with containerization and orchestration (Docker, Kubernetes).

  • Understanding of secure API development practices (OAuth2, JWT, RBAC).

  • Familiarity with CI/CD pipelines and version control systems (Git).

  • Experience working in enterprise or regulated environments is a plus.

  • Strong problem-solving skills and ability to work independently in a fast-paced environment.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, disability status, or other non-merit factor. We are committed to creating a diverse and inclusive environment for all employees.