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Senior Python Developer Jobs in Saint Catharines, ON

The Senior DevOps Engineer is the architect of our cloud-native ecosystem. This role focuses on ... Strong ability to write production-quality code in Go, Python, or Ruby for automation and custom ...

Python, Java, TypeScript * Test frameworks: pytest, JUnit, Playwright or Cypress * API and load ... engineering, or a closely related role, including lead or senior responsibility * Hands-on ...

Senior Python Developer information

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 Saint Catharines, ON are hiring for Senior Python Developer jobs?

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

Infographic showing various Senior Python Developer job openings in Saint Catharines, ON as of August 2026, with employment types broken down into 3% Internship, 86% Full Time, 3% Part Time, and 8% Contract. Highlights an 80% Physical, 6% Hybrid, and 14% Remote job distribution.

Senior Full Stack Python Developer - FT

Demand For HR

Hamilton, ON • On-site

Full-time

Posted 19 days ago


Job description

Senior Full-Stack Software Engineer (AI Research Platform)
We are seeking a Senior Full-Stack Software Engineer to lead the design and development of an AI-enabled research platform from concept through production deployment. You will work directly with a multidisciplinary research team to translate research ideas into a scalable, secure, and production-quality software platform. This role requires technical leadership, hands-on software development, and the ability to make sound architectural decisions while preparing the platform for future AI-powered capabilities such as prediction, recommendation, optimization, and intelligent decision support.
Key Responsibilities
● Take technical ownership of the platform architecture, implementation, and delivery.
● Design and develop modern full-stack web applications using Python and React or Next.js.
● Build secure backend services, REST APIs, authentication, and database solutions.
● Design scalable cloud infrastructure using AWS, Azure, or Google Cloud.
● Implement CI/CD pipelines, automated testing, monitoring, and deployment processes.
● Integrate external APIs, research systems, and AI/ML services.
● Develop dashboards, reports, visualizations, and user workflows.
● Collaborate with researchers to translate research requirements into software solutions.
● Recommend technologies, engineering practices, and architectural improvements.
● Produce technical documentation and support long-term platform maintainability.
Required Qualifications
● Bachelor's degree in Computer Science, Software Engineering, Computer Engineering, or a related field.
● 5+ years of professional experience building production web applications.
● Strong Python backend development experience.
● Experience building modern frontend applications using React or Next.js.
● Experience designing scalable software architecture and RESTful APIs.
● Experience with relational databases and data modeling.
● Hands-on experience with cloud platforms (AWS, Azure, or Google Cloud).
● Experience with Docker, Git, and CI/CD pipelines.
● Strong software engineering, testing, debugging, and communication skills.
● Ability to work independently and make technical decisions with minimal supervision.
Preferred Qualifications
● Experience integrating AI or machine learning capabilities into production software.
● Knowledge of prediction, forecasting, recommendation, classification, or optimization techniques.
● Experience with data visualization and analytics..
● Familiarity with Infrastructure as Code, or modern DevOps practices.
● Experience developing research, scientific, or engineering software.
● Familiarity with server user access, storage, backups, monitoring, logs, and deployment support.
● Familiarity with server-side software dependencies, environment configuration, and resource usage.
Who You Are
You are an experienced software engineer who enjoys building products from the ground up. You take ownership, solve complex technical problems, communicate effectively with both technical and non-technical stakeholders, and deliver high-quality software that can evolve as research needs grow.
Application Instructions:
Please submit your resume and, if available, links to GitHub repositories, technical portfolios, or examples of production software you have designed or developed