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Replacement: This position is open due to an existing vacancy to support our evolving business needs. Are you excited about working at the forefront of applied research in an industry setting?Thomson Reuters Labsin Toronto is seeking scientists with a passion for solving problems usingstate-of-the-artgenerative AI,information retrieval, natural language processing. What doesThomson Reuters Labsdo? We experiment, we build, we deliver. We support the organization and our customers throughapplied research ingenerative AI,informational retrieval, natural languageprocessingand machine learning. We work closely with product and domain experts toidentifycompelling solutions at the intersection of user needs and technical feasibility. Our teamis responsible fordesigning the next generation of tax, accounting and audit compliance software for Tax Professionals and Corporates in the US, and across the global markets. We own AI innovation for Thomson Reuters' core tax products, includingCoCounsel for Tax,Checkpoint Edge,Cloud Audit Suite,SurePrepandONESOURCE.Our notablerecent agentic AIproduct launches includeReady to AdviseandReady to Review. About the Role: LeadApplied Scientists are experts inGenerative AI(LLM agents),Machine Learning, andNLP, responsible for the design and delivery of AI solutions that enhance Thomson Reuters' products. Theyleverageinformation retrieval techniques,agenticworkflows, modeltrainingand evaluation design to build andoptimizesolutions. Their work ensures AI technologies are effectively aligned with businessobjectives, driving product innovation and value. As aLeadApplied Scientist, you will: Innovate and drive solution delivery as a technical leader Be fully accountable for all research deliverables Provide input to the business and Labs leadership on long term AI strategy. Lead and drive stakeholder engagement with other functions (UX, Product, Tech) Develop in-depth knowledge of customer problems and data Design andoptimizemulti-agent systems including tool design, complex tool calling, context management, and workflow orchestration for production deployment Develop comprehensive evaluation frameworks leveraging LLM observability platforms to measure agent performance and end-to-end system quality Maintain scientific and technicalexpertisein one or more relevant areas asdemonstratedthrough product deliverables, published research, and intellectual property. Mentor and coach other scientists and engineers on best practices Partner effectively with Engineering to ensure well-managed software delivery and co-design LLM Ops processes related to model monitoring, evaluation, and retraining. Communicate research in peer-reviewed publications and develop patentable ideas ensuring competitiveness of the company's products and services. About You: You're a fit for the role ofLeadApplied Scientist if your background includes: PhD in a relevant discipline orMaster'splus a comparable level of experience 7+ years of hands-on experience building IR / NLP / LLM / Agentic Systems for commercial applications Experience with agentic AI systems, including tool use, multi-agent orchestration, context management strategies, and agent observability and telemetry platforms (e.g., Braintrust,Langfuse) Experience writing production code, ensuring well-managed software delivery, andleveragingAI-assisted coding tools (e.g., Cursor, Claude Code) for productivity Demonstrable experience translating complex problems into successful AI applications Professional experience scaling yourself and leading through others, in an applied research setting Outstanding communication, problem-solving, and analysis skills Collaborating with Product, Engineering and Business Stakeholders in an agile manner todemonstratevalue and iterate with customer feedback, while proactively surfacing ideas and POCs driven by customer needs Strong Python skills with experience inPydanticAI/Pydanticand familiarity with deep learning frameworks (e.g.,PyTorch, Hug ing Face) Publications at relevant venues such as ACL, EMNLP, NAACL,NeurIPS, ICLR, SIGIR, or KDD. #LI-LP2 What's in it For You? 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... For full info follow application link. As a global business we rely on diversity of culture and thought to deliver on our goals. To ensure we can do that, we seek talented, qualified employees in 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 country or local law. Thomson Reuters is proud to be an Equal Employment Opportunity Employer providing a drug-free workplace.