Senior Python Engineer Jobs in Ontario (NOW HIRING)

Fitch Ratings is seeking a Senior Software Engineer to join our global Ratings Technology team in Toronto. You'll build and maintain mission-critical full-stack applications that power how a world-leading credit ratings agency delivers insights to analysts, executives, and decision-makers who shape global financial markets.

You'll work on Ratings workflow and analytical applications using modern technologies across the full stack-from backend services in Java and Python to frontend applications in React. This role offers the opportunity to work with cutting-edge cloud technologies, contribute to technical solutions, and grow your skills in a collaborative environment.

Impactful work - Build applications used by analysts worldwide with direct visibility to your contributions

Modern technology stack - Work with Java, Python, React, AWS, Kubernetes, and emerging AI technologies

Continuous learning - Training, certifications, conferences, and clear paths to senior/principal/architect tracks

Flexible environment - Work from our Manchester office with hybrid flexibility, competitive compensation, comprehensive benefits, and work-life balance

Innovation culture - Experiment with new technologies, contribute ideas, and help shape technical decisions

Develop and maintain full-stack applications - Build robust, scalable applications using Python (FastAPI/Flask), and ReactJS following best practices and design patterns

Contribute to the development lifecycle - Write clean, maintainable code, implement CI/CD pipelines with GitHub Actions, deploy to Kubernetes, and ensure quality through testing and code reviews

Work with diverse data technologies - Develop solutions using RDBMS (PostgreSQL, Oracle) and NoSQL (MongoDB) databases, optimize queries, and ensure data integrity

Collaborate across teams - Partner with product managers, analysts, and other engineers to understand requirements and deliver solutions that meet business needs

Apply engineering best practices - Follow SOLID principles and design patterns, participate in code reviews, solve technical challenges, and contribute to code quality

Support and improve systems - Troubleshoot production issues, optimize performance, and help ensure reliability of applications at scale

Stay current with technology - Learn and experiment with emerging technologies, share knowledge with the team, and contribute to continuous improvement

Full-Stack Engineering Experience - 7+ years of hands-on experience building enterprise applications and modern web technologies in production environments

Software Engineering Fundamentals - Strong understanding of OOP concepts, design patterns, SOLID principles, algorithms, data structures, and ability to write clean, maintainable code

Backend Development - Proficiency in Python (Pandas, FastAPI, Flask) for building enterprise applications, data processing, and API development

Frontend Development - Experience with ReactJS, Node.js, TypeScript/JavaScript, and modern web development practices

Database Technologies - Hands-on experience with RDBMS databases (e.g., Oracle, PostgreSQL) and NoSQL databases (e.g., MongoDB)

DevOps & Cloud - Experience with CI/CD pipelines, GitHub Actions, Kubernetes (K8s), shell scripting (Bash) for automation, and AWS cloud platform

Effective communication and teamwork - Ability to collaborate with cross-functional teams and communicate technical concepts clearly

AI and Machine Learning - Understanding of AI/ML concepts, experience with LLMs, prompt engineering, or integrating AI capabilities into applications

Data Technologies - Experience with Kafka, PySpark, Parquet and Avro data formats, Apache Airflow for workflow management, or Streamlit for building interactive data applications

Advanced Data Management - Strong SQL design, query optimization, and database architecture expertise

Observability - Experience with observability patterns and tools like Datadog, distributed tracing, monitoring, and logging best practices

DevOps and Infrastructure - Familiarity with ArgoCD for GitOps and Security/Access Management (IAM federation access via Entra ID)

Financial Services Background - Experience with analytical workflows, financial products, or regulatory processes

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.

FOR TORONTO ROLES ONLY: Expected base pay rates for the role will be between 130,000 CAD and 160,000 CAD. Actual salaries will be determined on an individualized basis and may vary based on factors including but not limited to education, training, experience, past performance, and other job-related factors. Base pay is one part of Fitch's total compensation package, which, depending on the position, may also include commission earnings, discretionary bonuses, long-term incentives, and other benefits sponsored by Fitch. 

#LI-Group

#LI-AT

#LI-Hybrid