Principal Engineer

Thomson Reuters; Toronto; Hybrid; CAD 169,000 - 219,000; Full time

Job summary

A significant technology company in Toronto is looking for a Principal Engineer in AI to lead the integration of AI solutions in legal content systems. The ideal candidate will have over 10 years of software engineering experience and a proven record in developing scalable AI systems. Key responsibilities include technical leadership and collaboration with cross-functional teams to define innovative software solutions. This role offers a hybrid work model and competitive benefits to promote work-life balance.

Benefits

Hybrid work model

Flexible vacation and paid leaves

Career development programs

Comprehensive benefit plans

Opportunities for community involvement

Qualifications

• 10+ years of hands-on software engineering experience.
• Proficient in artificial intelligence technologies.
• Experience with LLMs and AI Dev Tools required.

Responsibilities

• Provide technical leadership for AI projects.
• Lead design and development of innovative features.
• Mentor a team of engineers and architects.

Skills

AI solutions development

Software engineering

Cloud platforms

Interpersonal skills

Mentoring

Education

Advanced degree in Computer Science or relevant field

Tools

AWS

Azure

Google Cloud Platform

Job description

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

Want to shape how AI powers the next generation of content and editorial intelligence? As Principal Engineer, AI on our Content Engineering team at Thomson Reuters, you’ll design and ship agentic and generative AI systems that sit at the core of Content and Editorial workflows of Thomson Reuters trusted legal research content and know-how. You’ll partner closely with ML researchers, product, and legal domain experts to turn our unique corpus and editorial workflows into scalable AI capabilities that materially change how professionals research, reason, and make decisions. This is a high‑leverage role for someone who cares about rigorous engineering, responsible AI, and building for a market where reliability, explainability, and customer trust are non‑negotiable.

About the Role

• 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 for Content Engineering, advancing AI-native outcomes.
• Drive the seamless integration of LLMs and generative AI technologies into user-friendly applications for legal editors.
• Streamline the design and delivery of Agentic Systems that are scalable and consistent, driving business impacts for Content.
• 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.

About You

• 10+ years of hands‑on software engineering experience with a proven record of developing scalable, full‑stack, AI solutions.
• Experience with AI technologies, including GenAI concepts such as Agentic systems, prompt engineering, retrieval‑augmented generation (RAG), and fine‑tuning.
• Familiarity with cloud platforms (AWS, Azure, or Google Cloud Platform), LLMs, Devops and SDLC for AI projects.
• Excellent interpersonal and communication skills, with the ability to influence across organizational 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.

Additional preferred qualifications include

• Experience integrating AI/ML technologies into content specific / legal applications.
• Background in enterprise SaaS environments, building with AI Dev Tools and LLMs
• Advanced degree in Computer Science, Engineering, or a related field.

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‑bino 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. For any eligible US locations, unless otherwise noted, the base compensation range for this role is $154,000 USD - $286,000 USD. For Ontario, Canada, the base compensation range for this role is $169,000 CAD - $219,000 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.