Principal Engineer, CoCounsel Application

Thomson Reuters
life insurance, parental leave, paid time off, paid holidays, tuition reimbursement, 401(k)

2900 Ames Crossing Road (Show on map)
Oct 04, 2025
Principal Engineer, CoCounsel Application Want to shape the future of AI in legal practice? Join Thomson Reuters as a Principal Engineer and drive innovation for CoCounsel, the leading AI Assistant for legal professionals. At Thomson Reuters, we're revolutionizing legal work through our CoCounsel Platform. As Principal Engineer for CoCounsel Application, you'll partner with the Sr. Director for CoCounsel Application to define and execute the technical vision for our generative AI products, ensuring we deliver powerful, user-friendly, and innovative solutions that transform how legal professionals work. About the Role In this opportunity as Principal Engineer, CoCounsel Application, you will: 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 CoCounsel, advancing AI-native product experiences. Drive the seamless integration of LLMs and generative AI technologies into user-friendly applications for legal professionals. 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. About You You're a fit for the role of Principal Engineer, CoCounsel Application if your background includes: 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 AI technologies, including GenAI concepts such as prompt engineering, retrieval-augmented generation (RAG), and fine-tuning. Familiarity with cloud platforms (AWS, Azure, or GCP). 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 customer-facing applications. Background in legal technology or enterprise SaaS environments. Advanced degree in Computer Science, Engineering, or a related field. #LI-ES1 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. 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 - $286,000. This role may also be eligible for an Annual Bonus based on a combination of enterprise and individual performance. 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. 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. Learn more on how to protect yourself from fraudulent job postings here. More information about Thomson Reuters can be found on thomsonreuters.com.