Senior React Developer Jobs in Toronto, ON (NOW HIRING)

Senior Software Engineer, Full-Stack Applications (Python & React)

Fitch Ratings is seeking a Senior Software Engineer to join our global Ratings Technology team in Toronto. This is an opportunity to build and enhance mission-critical applications that power the workflows, analytics, and decision-making processes used by analysts across a world-leading credit ratings organization.

As a member of our Ratings Technology team, you will work on modern full-stack applications that support core business capabilities, partnering closely with engineers, product managers, and business stakeholders. We are looking for a highly experienced software engineer with deep expertise in Python and React, strong software engineering fundamentals, and a passion for building scalable, reliable, and user-focused solutions.We are particularly interested in engineers who are excited about the next generation of software development, including the use of AI-powered technologies and large language models (LLMs) to improve applications, automate workflows, and create better user experiences. What We Offer:

• Meaningful technical impact - Build applications and services that directly support Fitch Ratings' analytical and operational workflows, used by teams across the organization.
• Innovation-first culture and experimentation - Permission to challenge established patterns, explore emerging technologies including AI, and drive proof-of-concepts with access to cutting-edge tools and a community that celebrates curiosity and bold thinking
• Continuous learning and career growth - Training, certifications, conferences, mentorship opportunities, and clear paths to principal/architect/leadership tracks as you establish yourself as a thought leader
• Flexibility and world-class environment - Work from premier offices in Toronto with hybrid flexibility, competitive compensation reflecting your seniority, comprehensive benefits, and a culture that values both innovation and work-life harmony

 We'll Count on You To:       Design, develop, and maintain full-stack applications using Python, React, and modern software development practices.       Build scalable backend services and APIs that support business-critical workflows and data-driven applications.       Develop intuitive frontend experiences using React, TypeScript, and modern web technologies.       Collaborate with cross-functional teams to understand requirements, define technical solutions, and deliver high-quality software.       Contribute to application architecture and technical design, ensuring scalability, maintainability, security, and performance.       Promote engineering excellence through code reviews, testing, documentation, CI/CD automation, and software development best practices.       Explore and implement AI-powered capabilities where they can create business value, improve user experiences, or enhance operational efficiency. What You Need to Have:       8+ years of professional software engineering experience building and supporting enterprise-grade applications.       8+ years of hands-on Python development experience, building scalable backend services, APIs, and data-driven applications using frameworks such as FastAPI, Flask, Django, or similar.       5+ years of hands-on React experience developing modern, responsive, and scalable web applications in production environments.       Strong experience with TypeScript/JavaScript, HTML, CSS, and modern frontend development practices.       Experience designing and developing RESTful APIs and integrating with third-party services.       Solid understanding of software design principles, design patterns, object-oriented programming, data structures, algorithms, and scalable system architecture.       Experience working with relational and NoSQL databases.       Familiarity with Agile development methodologies and modern software delivery practices       AI Fluency - Experience or familiarity with integrating AI-powered capabilities into software applications, including LLM APIs such as OpenAI, AWS Bedrock, Anthropic, or similar platforms. Understanding of concepts such as prompt engineering, retrieval-augmented generation (RAG), AI agents, and responsible AI practices, with the ability to evaluate and apply AI technologies to solve real business problems.       Bachelor's degree in Computer Science, Software Engineering, or a related field, or equivalent practical experience.       Strong communication and collaboration skills, with the ability to work effectively in cross-functional teams. What Would Make You Stand Out:

• Experience with Infrastructure as Code (Terraform, AWS CDK, or CloudFormation)
• Familiarity with Apache Spark or other distributed processing frameworks
• Experience with dbt, Airflow, or similar data pipeline orchestration tools
• Knowledge of MLOps practices and model deployment
• Experience working in Agile/Scrum environments
• Familiarity with observability tools (e.g., Datadog, Grafana, OpenTelemetry)
• Familiarity with data visualization tools like Qlik Sense, Power BI, Amazon Quicksight

If you are a seasoned technologist with a passion for innovation, a desire to shape organizational direction, and the courage to question the status quo, we would love to hear from you!

 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.

 About Fitch Group

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 140,000 CAD and 180,000 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.  

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