Principal Engineer

Toronto, ON
Hybrid
Posted Nov 4, 2026
1 position

US$158,900–US$340,000 / year

Opens an external site

Employment type: Full-time
Experience level: Lead · 10+ years
Minimum education: Master’s degree
Apply by: Jan 4, 2027
Posting language: English
Working hours: 40 hours per week

Job summary

Define and execute the technical vision for generative AI products within the Corporate Tax and Trade division. Lead cross-functional teams in designing scalable, AI-native solutions while mentoring engineering staff and managing technical risk.

Job details

Job Description Principal Engineer Are you passionate about pushing the boundaries of AI technology and leading the charge in building intelligent solutions that transform how Tax and Trade products work? Join the Thomson Reuters Corporate Tax and Trade team and drive the technical execution of groundbreaking AI projects that make a real difference. As Principal Engineer for Corporate Tax and Trade, you'll define and execute the technical vision for our generative AI products, ensuring we deliver powerful, user-friendly, and innovative solutions that transform Tax and Trade products. Key Responsibilities Provide technical leadership and define software development strategies for critical AI projects, ensuring alignment with business objectives. Lead the design and development of innovative features advancing AI-native product experiences. Drive the seamless integration of LLMs and generative AI technologies into Corporate Tax and Trade products. Streamline the use of Micro Front Ends to ensure low latency, scalability, and excellent user experience. Mentor a globally distributed team of engineering managers, architects, and developers to strengthen engineering culture. Lead complex technical initiatives, exercising autonomy in decision-making and managing technical risk. Collaborate with cross-functional teams to translate business requirements into actionable technical solutions. Required Qualifications 10+ years of hands-on software engineering experience with a proven record of developing scalable, web-based solutions. Expertise with modern UI frameworks (React, Angular, Vue, or similar), TypeScript, Node.js, and Python. Experience with building agentic platform, MCP, Evals, secure AI, golden data set, PydanticAI, SDK like Claude agent SDK, Prompt and context engineering, Sandboxing Experience with cloud platforms (AWS, Azure, or GCP). Excellent interpersonal and communication skills, with the ability to influence across organisational boundaries. Demonstrated ability to mentor others and promote best practices in release management, AI dev tools, and test-driven development. Ability to navigate ambiguity, make data-driven decisions, and deliver results in a fast-paced environment. Experience integrating AI/ML technologies into customer-facing applications. Background in enterprise SaaS environments. Advanced degree in Computer Science, Engineering, or a related field. Preferred Qualifications N/A #LI-ES1 New Position: This position is open due to an existing vacancy to support our evolving business needs. What’s in it For You? Hybrid Work Model: We’ve adopted a flexible hybrid working environment 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. In the United States, Thomson Reuters offers a comprehensive benefits package to our employees. Our benefit package includes market competitive health, dental, vision, disability, and life insurance programs, as well as a competitive 401k plan with company match. In addition, Thomson Reuters offers market leading work life benefits with competitive vacation, sick and safe paid time off, paid holidays (including two company mental health days off), parental leave, sabbatical leave. These benefits meet or exceeds the requirements of paid time off in accordance with any applicable state or municipal laws. Finally, Thomson Reuters offers the following additional benefits: optional hospital, accident and sickness insurance paid 100% by the employee; optional life and AD&D insurance paid 100% by the employee; Flexible Spending and Health Savings Accounts; fitness reimbursement; access to Employee Assistance Program; Group Legal Identity Theft Protection benefit paid 100% by employee; access to 529 Plan; commuter benefits; Adoption & Surrogacy Assistance; Tuition Reimbursement; and access to Employee Stock Purchase Plan. 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. Eligible office location(s) for this role include one or more of the following: New York City, San Francisco, Los Angeles, and/or Irvine, CA; McLean, VA; Washington, DC. The base compensation range for the role in any of those locations is $183,100 USD - $340,000 USD. For any eligible US locations, unless otherwise noted, the base compensation range for this role is $158,900 USD - $295,100 USD. 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. Thomson Reuters makes reasonable accommodations for applicants with disabilities, including veterans with disabilities, and for sincerely held religious beliefs in accordance with applicable law. If you reside in the United States and require an accommodation in the recruiting process, you may contact our Human Resources Department at HR.Leave-Expert@thomsonreuters.com. Disability accommodations in the recruiting process may include things like a sign language interpreter, making interview rooms accessible, providing assistive technology, or other relevant accommodations. Please note this email is not intended for general recruitment questions and we will promptly respond to inquiries regarding accommodations. More information on requesting an accommodation here. Learn more on how to protect yourself from fraudulent job postings here. More information about Thomson Reuters can be found on thomsonreuters.com

What you’ll do

Requirements

Requires 10+ years of software engineering experience with expertise in modern UI frameworks, Python, and cloud platforms. Candidates must have a background in enterprise SaaS and experience integrating AI/ML technologies into customer-facing applications.