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Junior Python Backend Developer Jobs in Toronto, ON

Citi

Python AI Engineer (Hands-On)

Mississauga, ON · On-site

Mentor junior team members and share knowledge with team members specializing in AI technologies to ... TypeScript). 3+ years of experience delivering complex backend solutions and services (e.g., APIs ...

US Mobile

Principal Backend Engineer

Toronto, ON · On-site

CA$160K - CA$220K/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 ...

US Mobile

Senior Backend Engineer

Toronto, ON · On-site

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 ...

Synechron

Python Full Stack Developer

Toronto, ON · Hybrid

CA$105K - CA$115K/yr

As a Full Stack Developer, candidate will be responsible for designing, building, and maintaining ... Build and maintain backend services using Python, Django, and Celery. * Design and manage ...

Manulife

Back-End Software Engineer

Toronto, ON · Hybrid

CA$86K - CA$136K/yr

... Python API), Azure Data Factory and SQL Server * 5+ years of experience developing cloud-native ... using Azure DevOps, Jenkins, GitHub Actions, or similar technologies * Proven experience in ...

Autodesk

Senior Software Developer

Toronto, ON

This role combines hands-on backend engineering (Python, serverless, microservices, APIs, AWS) with operational ownership and close collaboration with product, data stewards, and UX. The successful ...

Citi

Python Full Stack Developer - VP

Mississauga, ON · On-site

CA$170/hr

... with backend frameworks such as Spring Boot / Spring Core and Flask / FastAPI Solid frontend ... Large Language Models (LLMs) and transformer based systems Prompt engineering and basic agent ...

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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?

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.
Junior Python Backend Developer jobs near you
Infographic showing various Junior Python Backend Developer job openings in Toronto, ON as of June 2026, with employment types broken down into 94% Full Time, 1% Part Time, 1% Temporary, and 4% Contract. Highlights an 83% Physical, 5% Hybrid, and 12% Remote job distribution.

Senior Backend Engineer (Online Security)

Toronto, ON • Remote

US Mobile
Telecommunications • 11 - 50 employees
Learn more about US Mobileexternal

CA$130K - CA$190K/yr

Full-time

Medical

Re-posted 20 days ago

Job description

US Mobile is on a mission to revolutionize connectivity. Imagine a world where you can go into a single app and buy terabytes of data for every one of your devices: phone, smart devices, car, home broadband, and more. That's the future that US Mobile is building: a software platform built truly for the 21st century and the age of 5G and IoT, with world class engineering, best-in-class user experience, and features that will define the next generation of connectivity. 

At the core of it all, we have a team and culture that has been recognized by Forbes as one of the top 500 best startup employers in the US. Our team spans diverse backgrounds, cultures, and stories, with employees coming from 20+ countries.

We're a venture-backed company entering hypergrowth, having recently ranked 94th on Inc 5000's fastest-growing private companies in America, and we're looking for someone exceptional to join our team.

We're looking for a skilled and motivated Senior Backend Engineer to help us scale connectivity to millions of devices, while keeping that platform secure from the ground up. In this role, you'll design, develop, and maintain scalable backend services and APIs that power our products, with deep ownership over online security: protecting devices and networks, hardening authentication and access controls, and building systems that detect and respond to threats in real time.

You'll work in a collaborative, agile environment and contribute to mission-critical systems that millions of users depend on every day.

Key Responsibilities:
  • Develop and maintain RESTful APIs using Java (Spring Boot or related web frameworks) or Python (Flask, Django)
  • Design and implement asynchronous service communication using RabbitMQ or AWS SQS/SNS
  • Work with NoSQL databases like MongoDB for data modeling and storage
  • Collaborate with Product, QA, and DevOps teams to deliver reliable and scalable features
  • Write clean, testable, and well-documented code with unit and integration tests
  • Participate in system architecture design, code reviews, and performance tuning
Qualifications:
  • Develop and maintain RESTful APIs using Java (Spring Boot or related web frameworks) or Python (Flask, Django)
  • Design and implement asynchronous service communication using RabbitMQ or AWS SQS/SNS
  • Work with NoSQL databases like MongoDB for data modeling and storage
  • Collaborate with Product, QA, and DevOps teams to deliver reliable and scalable features
  • Write clean, testable, and well-documented code with comprehensive unit and integration tests
  • Participate in system architecture design, code reviews, and performance tuning
Nice to Haves:
  • 7+ years of experience with Java and Spring Boot
  • Strong experience within Online Security, including:
    • Protecting internet-connected devices, networks, and personal data from digital threats
    • Authentication and Access management
    • Software Protection
    • Network Security
    • Threat Detection
  • Strong experience building and consuming REST APIs at scale
  • Hands-on experience with message brokers such as RabbitMQ or AWS SQS/SNS
  • Familiarity with MongoDB or other NoSQL database technologies
  • Solid understanding of Git, CI/CD workflows, and agile development practices
  • Excellent debugging, problem-solving, and communication skills
  • Strong team collaboration instincts, you make the people around you better
Benefits:
  • Competitive salary (varies based on location)
  • Flexible working hours
  • Gym reimbursement ($100/mo)
  • Supplemental health insurance
  • Professional development stipend
  • $500 CAD wfh tech set-up reimbursement
$130,000 - $190,000 a year
Think you'd be a great fit? Apply to learn more!
We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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