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Senior Python Developer Jobs in Mississauga, ON (NOW HIRING)

Citi

Python Full Stack Developer - VP

Mississauga, ON

CA$170/hr

The Applications Development Technology Lead Analyst is a senior level position responsible for ... The overall objective of this role is to lead applications systems analysis and programming ...

Citi

Senior Data Engineer - Python

Mississauga, ON

CA$120K - CA$170K/yr

We are seeking a skilled and experienced Senior Data Engineer with strong Python expertise to join our Engineering team. The ideal candidate is passionate about building robust, scalable data ...

Citi

Senior Data Engineer - Python

Mississauga, ON · On-site

CA$120K - CA$170K/yr

We are seeking a skilled and experienced Senior Data Engineer with strong Python expertise to join our Engineering team. The ideal candidate is passionate about building robust, scalable data ...

CorGTA

Senior Data Engineer

Toronto, ON · Hybrid

CA$100/hr

Senior Data Engineer Structure: Hybrid (2 days onsite / 3 days remote) - Toronto Duration: 6-Month ... Build and optimize data pipelines using Python, SQL and modern cloud technologies * Develop and ...

Autodesk

Senior Software Developer

Toronto, ON

... Senior Software Developer to join a Data Services team focused on delivering core record- and ... This role combines hands-on backend engineering (Python, serverless, microservices, APIs, AWS) with ...

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Senior Python Developer information

See Mississauga, ON salary details

$53.7K

$124.8K

$172.9K

How much do senior python developer jobs pay per year?

As of Sep 8, 2026, the average yearly pay for senior python developer in Mississauga, ON is $124,799.00, according to ZipRecruiter salary data. Most workers in this role earn between $105,500.00 and $141,295.00 per year, depending on experience, location, and employer.

What are the main responsibilities of a senior Python developer?

A Senior Python Developer is responsible for designing, developing, and maintaining complex software applications using the Python programming language. They lead the technical aspects of projects, mentor junior developers, and ensure code quality through code reviews and best practices. Additionally, they collaborate with cross-functional teams to gather requirements, solve technical challenges, and deploy scalable and efficient solutions. Senior Python Developers are also expected to stay updated with the latest trends and advancements in Python and related technologies.

What are the key skills and qualifications needed to thrive as a senior Python developer?

To thrive as a Senior Python Developer, you need advanced proficiency in Python programming, experience with software architecture, and a solid understanding of algorithms and data structures, usually backed by a degree in computer science or related fields. Familiarity with frameworks like Django or Flask, version control systems such as Git, and containerization tools like Docker are typically required, alongside knowledge of modern CI/CD pipelines. Strong problem-solving abilities, effective communication, and leadership skills help you collaborate with teams and mentor junior developers. Mastery of these skills ensures the delivery of scalable, maintainable software solutions and the ability to drive technical excellence within development teams.

What are some common challenges faced by senior Python developers when leading a development team?

Senior Python Developers often encounter challenges such as balancing hands-on coding with mentoring junior team members and ensuring code quality across the team. They are also responsible for making architectural decisions, which requires staying updated on best practices and emerging Python frameworks. Additionally, coordinating collaboration between cross-functional teams (like DevOps, QA, and front-end developers) can be complex, especially in agile environments where requirements may shift rapidly. Overcoming these challenges helps foster a productive and innovative team culture.

What is the difference between Senior Python Developer vs Python Developer?

AspectSenior Python DeveloperPython Developer
Required ExperienceTypically 5+ years, with leadership and complex project experienceUsually 1-3 years, focusing on core Python skills
ResponsibilitiesDesigning architecture, mentoring, handling complex systemsWriting code, debugging, implementing features
CertificationsOptional but beneficial (e.g., Python certifications, cloud certs)Often not required
Work EnvironmentCollaborative teams, project planning, code reviewsDevelopment-focused, task-oriented

The main difference between a Senior Python Developer and a Python Developer lies in experience, responsibilities, and leadership. Senior developers handle complex projects, mentor others, and often participate in architecture decisions, while Python Developers focus on coding and feature implementation. Both roles are essential in tech companies, but the senior role requires more experience and broader skills.

Are senior Python developers still in demand?

Senior Python developers remain in high demand due to the language's versatility in web development, data analysis, machine learning, and automation. Companies seek experienced developers with skills in frameworks like Django or Flask, and proficiency in cloud platforms and APIs enhances job prospects.

How much does a senior Python developer make?

A senior Python developer typically earns between $100,000 and $150,000 annually, depending on experience, location, and industry. They often possess strong skills in frameworks like Django or Flask and may hold certifications or advanced degrees that influence salary levels.

What does a senior Python developer do?

A senior Python developer designs, develops, and maintains complex software applications using Python. They often lead projects, review code, optimize performance, and collaborate with cross-functional teams, requiring strong problem-solving skills and knowledge of frameworks like Django or Flask. Additionally, they may mentor junior developers and ensure code quality through testing and best practices.

What cities near Mississauga, ON are hiring for Senior Python Developer jobs?

Cities near Mississauga, ON with the most Senior Python Developer job openings:

Senior Python Developer jobs near you
Infographic showing various Senior Python Developer job openings in Mississauga, ON as of September 2026, with employment types broken down into 2% Internship, 86% Full Time, 7% Part Time, and 5% Contract. Highlights an 76% Physical, 5% Hybrid, and 19% Remote job distribution, with an average salary of $124,799 per year, or $60 per hour.

Senior Python Engineer (Toronto)

Fitch Solutions

Toronto, ON • Hybrid

Full-time

Re-posted 16 days ago

Key responsibilities

  • Support the development, testing, and maintenance of applications based on Python and cloud platforms.

  • Participate in the entire software development lifecycle, including building, testing, and delivering solutions.

  • Collaborate with cross-functional teams to identify and solve complex problems related to Ratings workflow tools.

Job description

Senior Software Engineer, Python Programmer

Fitch Ratings is currently seeking a Senior Software Engineer specializing in Python Programming or applications to join our team in Tornoto. In this role, you will support the development and delivery of applications based on Python and AWS, Azure cloud platform. You will collaborate with dynamic teams committed to maintaining high standards of quality, performance, and scalability for Fitch's Ratings workflow systems. If you are passionate about innovative solutions and thrive in a collaborative environment, we encourage you to apply.

Objectives of this role

  • Develop, test and maintain high-quality software using Python programming language.
  • Participate in the entire software development lifecycle, building, testing and delivering high-quality solutions.
  • Collaborate with cross-functional teams to identify and solve complex problems.
  • Write clean and reusable code that can be easily maintained and scaled.

Your tasks

  • Work on technically complex systems with strong hands-on experience in design and development.
  • Interpret complex requirements associated with Ratings workflow tools.
  • Participate in code reviews, ensure code quality and identify areas for improvement to implement practical solutions.
  • Set up CI/CD pipelines for projects and integrate them with the organization's delivery mechanisms.
  • Debugging codes when required and troubleshooting any Python-related queries.
  • Keep up to date with emerging trends and technologies in Python development.
  • Participate in Agile development processes to deliver high-quality software solutions.
  • Assist in managing multiple projects to ensure timely delivery within scope and timelines.
  • Provide production support and help establish technical best practices.

Required skills and qualifications

  • 8+ years of experience as a Python Developer with a strong portfolio of projects.
  • Bachelor's degree in software engineering or a related field.
  • In-depth understanding of the Python software development stacks, ecosystems, frameworks and automation.
  • Experience with front-end development and cloud-platforms/technologies offered by AWS, Microsoft Azure.
  • Experience with databases such as Postgres and Oracle and database technologies such as SQL and NoSQL.
  • Code versioning, maintenance and deployment tools like GitHub, Bamboo, JIRA.
  • Excellent problem-solving ability with solid communication and collaboration skills.

Preferred skills and qualifications

  • Experience with popular Python frameworks such as Django, Flask or Pyramid.
  • Knowledge of DevOps practices and tools (e.g., Docker, Kubernetes/EKS-based container orchestration).
  • Knowledge of data science and machine learning concepts and tools.
  • Contributions to open-source Python projects or active involvement in the Python community.

Why Fitch?

At Fitch Group, the combined power of our global perspectives is what differentiates us. Our global network of colleagues comes together to accomplish things greater than they ever could alone.

Every team member is essential to our business and each perspective is critical to our success. We embrace a diverse culture that encourages a free exchange of ideas, guaranteeing your voice will be heard and your work will have an impact, regardless of seniority.

We are building incredible things at Fitch and we invite you to join us on our journey.

Fitch Group is a global leader in financial information services with operations in more than 30 countries. Wholly owned by the Hearst Corporation, we are comprised of three main businesses: Fitch Ratings | Fitch Solutions | Fitch Learning.

For more information please visit our websites:  

www.fitchratings.com | www.fitchsolutions.com | www.fitchlearning.com

Fitch is committed to providing global securities markets with objective, timely, independent and forward-looking credit opinions. To protect Fitch's credibility and reputation, our employees must take every precaution to avoid conflicts of interests or any appearance of a conflict of interest. Should you be successful in the recruitment process at Fitch Ratings you will be asked to declare any securities holdings and other potential conflicts prior to commencing employment. If you, or your immediate family, have any holdings that may conflict with your work responsibilities, you may be asked to divest yourself of them before beginning work.

Fitch Group is proud to be an Equal Opportunity and Affirmative Action Employer. We evaluate qualified applicants without regard to race, color, national origin, religion, sex, sexual orientation, gender identity, disability, protected veteran status, and other statuses protected by law.

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