Senior Software Engineer

New Position: This position is open due to an existing vacancy to support our evolving business needs.

Senior Software Engineer – AI I

Are you excited about building AI-driven software that redefines how professionals work? Join a dynamic and highly skilled team at Thomson Reuters, where we combine the agility and innovation of a startup with the stability and resources of a global leader. As a Senior Software Engineer, you will play a pivotal role in developing AI-powered systems that enhance tax & accounting workflows through automation, intelligence, and seamless orchestration.

About The Role
In this opportunity as a Senior Software Engineer - AI, you will:

• Implement complex AI systems, including multi-component pipelines, Retrieval-Augmented Generation (RAG) systems, and custom AI agents that power next-generation tax & accounting solutions
• Ensure system quality and compliance by implementing comprehensive testing frameworks, monitoring tools, and ethical AI practices that maintain the highest standards of reliability and trustworthiness
• Proactively identify issues and risks, make data-driven recommendations, and take corrective action to optimize system performance and mitigate potential challenges
• Collaborate with cross-functional teams including Product, UX, and Science to align AI features with product goals and translate functional requirements into robust technical specifications
• Conduct proof-of-concepts (POCs) to evaluate emerging technologies and explore the feasibility of AI solutions for innovative use cases
• Analyze existing systems and recommend improvements to enhance operational efficiency, scalability, and overall system architecture
• Continuous Learning - Stay abreast of AI developments and encourage learning and adoption of relevant technologies

About You
You're a fit for the role of Senior Software Engineer - AI if you have the following required qualifications:

• 5+ years of software engineering experience, including 1+ years focused on AI/ML
• Proficiency in Python, with experience building web applications, distributed systems, and APIs
• Experience with AI/ML frameworks such as PyTorch and TensorFlow
• Strong understanding of AI/ML systems, including RAG architectures, AI agents, and agent-based/AI-driven systems; experience with AI APIs from providers like OpenAI and Anthropic
• Experience integrating AI models into production systems using APIs and data pipelines; knowledge of vector databases, embeddings, and search-based AI
• Strong understanding of machine learning principles, model evaluation, system design, and MLOps across the end-to-end lifecycle of AI-powered applications
• Passion for exploring new technologies and engineering paradigms

Additional Preferred Qualifications Include

• 1–2 years of AWS experience designing, deploying, and operating scalable cloud services (e.g., Lambda, S3, EC2 and related tools)

What's in it For You?

• Hybrid Work Model: We've adopted a flexible hybrid working environment (2-3 days a week in the office depending on the role) for our office-based roles while delivering a seamless experience that is digitally and physically connected.
• Flexibility & Work-Life Balance: Flex My Way is a set of supportive workplace policies designed to help manage personal and professional responsibilities, whether caring for family, giving back to the community, or finding time to refresh and reset. This builds upon our flexible work arrangements, including work from anywhere for up to 8 weeks per year, empowering employees to achieve a better work-life balance.
• Career Development and Growth: By fostering a culture of continuous learning and skill development, we prepare our talent to tackle tomorrow's challenges and deliver real-world solutions. Our Grow My Way programming and skills-first approach ensures you have the tools and knowledge to grow, lead, and thrive in an AI-enabled future.
• Industry Competitive Benefits: We offer comprehensive benefit plans to include flexible vacation, two company-wide Mental Health Days off, access to the Headspace app, retirement savings, tuition reimbursement, employee incentive programs, and resources for mental, physical, and financial wellbeing.
• Culture: Globally recognized, award-winning reputation for inclusion and belonging, flexibility, work-life balance, and more. We live by our values: Obsess over our Customers, Compete to Win, Challenge (Y)our Thinking, Act Fast / Learn Fast, and Stronger Together.
• Social Impact: Make an impact in your community with our Social Impact Institute. We offer employees two paid volunteer days off annually and opportunities to get involved with pro-bono consulting projects and Environmental, Social, and Governance (ESG) initiatives.
• Making a Real-World Impact: We are one of the few companies globally that helps its customers pursue justice, truth, and transparency. Together, with the professionals and institutions we serve, we help uphold the rule of law, turn the wheels of commerce, catch bad actors, report the facts, and provide trusted, unbiased information to people all over the world.

Our use of AI within the recruitment process Thomson Reuters utilizes Artificial Intelligence (AI) to support parts of our global recruitment process. Unless you opt-out, our AI system will assess the information provided by you and compare it to the requirements listed for the role, and present the result to our recruitment personnel for further review. The AI system acts as a supporting tool, but there is always a human making the decision if you will be considered for the role

Thomson Reuters complies with local laws that require upfront disclosure of the expected pay range for a position. The base compensation range varies across locations. For Ontario, Canada, the base compensation range for this role is $118,200 CAD - $168,200 CAD. Base pay is positioned within the range based on several factors including an individual's knowledge, skills and experience with consideration given to internal equity. Base pay is one part of a comprehensive Total Reward program which also includes flexible and supportive benefits and other wellbeing programs. This role may also be eligible for an Annual Bonus based on a combination of enterprise and individual performance.

About Us
Thomson Reuters informs the way forward by bringing together the trusted content and technology that people and organizations need to make the right decisions. We serve professionals across legal, tax, accounting, compliance, government, and media. Our products combine highly specialized software and insights to empower professionals with the data, intelligence, and solutions needed to make informed decisions, and to help institutions in their pursuit of justice, truth, and transparency. Reuters, part of Thomson Reuters, is a world leading provider of trusted journalism and news.

We are powered by the talents of 26,000 employees across more than 70 countries, where everyone has a chance to contribute and grow professionally in flexible work environments. At a time when objectivity, accuracy, fairness, and transparency are under attack, we consider it our duty to pursue them. Sound exciting? Join us and help shape the industries that move society forward.

As a global business, we rely on the unique backgrounds, perspectives, and experiences of all employees to deliver on our business goals. To ensure we can do that, we seek talented, qualified employees in all our operations around the world regardless of race, color, sex/gender, including pregnancy, gender identity and expression, national origin, religion, sexual orientation, disability, age, marital status, citizen status, veteran status, or any other protected classification under applicable law. Thomson Reuters is proud to be an Equal Employment Opportunity Employer providing a drug-free workplace.

We also make reasonable accommodations for qualified individuals with disabilities and for sincerely held religious beliefs in accordance with applicable law. More information on requesting an accommodation here.

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