Senior Software Engineer AI

Job Description

Senior Software Engineer, AI

Are you passionate about transforming the future of legal research with AI? Join our Global Westlaw Engineering organization and help shape the next generation of intelligent legal research solutions.

The Global Westlaw Engineering organization builds and operates the technology that powers Westlaw, the world’s leading legal research platform. Our teams develop innovative products and fiduciary-level, AI-based solutions that help legal professionals find trusted answers, uncover insights, and make confident decisions faster. Working across engineering, AI, data, platform, and product disciplines, we deliver secure, scalable, and intelligent experiences for customers around the globe.

As a Senior Software Engineer, AI, you will be a key technical contributor on a team that delivers the full-stack products, AI-enabled features, and services behind Westlaw’s next generation of experiences. You will build agentic legal research experiences and the retrieval services that ground them in trusted legal content.

You will be deeply hands-on, designing and writing production code, contributing to architecture, and raising the engineering bar for your team. You will build with agentic systems, retrieval-augmented generation (RAG), and large language models (LLMs), and use AI-assisted development as a core way of working so you can deliver intelligent, trustworthy, and high-performing solutions for legal professionals worldwide.

Key Responsibilities

Technical Ownership

· Design, build, and ship scalable user interfaces, backend services, and RESTful APIs.

· Build GenAI and LLM integrations, including agentic workflows, prompt and context design, and retrieval services grounded in trusted legal content.

· Contribute to architecture, engineering standards, coding practices, and code review, with a focus on deep technical ownership.

· Own your work through to reliable production operations, including build, deployment, monitoring, and reliability, supported by automation and CI/CD.

· Ensure delivery meets functional and non-functional requirements, including performance, scalability, reliability, security, and maintainability.

· Embed quality and security into every stage of development, with rigorous testing, secure coding practices, and continuous evaluation of quality.

· Design and build cloud-native solutions on AWS.

· Evaluate and integrate emerging tool protocols (such as MCP) and retrieval patterns, with a clear understanding of production readiness and operational implications.

· Resolve critical production issues and drive root-cause fixes.

AI-Enabled Engineering

· Use AI-assisted and agent-driven development daily, and monitor and optimize token consumption to balance productivity, quality, and cost.

· Deliver features using AI agents, applying clear task specification, careful human review of agent-generated code, and accountability for what ships.

· Apply AI across the engineering lifecycle, including code generation, code review, test automation, and quality evaluation, with guardrails for security, data handling, and responsible use.

· Help measure the impact of AI and agents on delivery speed, code quality, and defect rates.

· Build and apply evaluation practices for agents, including testing, benchmarking, and monitoring agent behavior.

Collaboration and Mentorship

· Mentor and coach engineers, sharing knowledge in information retrieval, agentic system design, and AI-assisted development.

· Help shift team mindsets by modeling continuous learning and introducing new tools, practices, and ways of working.

· Partner with Product, Design, and cross-functional teams to translate requirements into well-designed solutions.

· Translate complex technical concepts and trade-offs into clear terms for stakeholders.

· Delivery

· Deliver solutions aligned with product roadmaps through incremental delivery, managing dependencies and tracking success metrics.

· Follow and help improve secure engineering processes for the team that builds and delivers our flagship legal research products.

Continuous Learning

· Stay current with developments in AI, cloud computing, and software engineering, and bring them into the team’s practices.

Required Qualifications

· 5+ years of hands-on software engineering experience across front-end and back-end, building scalable web applications.

· A track record of shipping and operating production-grade full-stack systems at scale, including secure coding practices and reliability.

· Hands-on experience building with LLMs in production or in serious prototypes, such as RAG, prompt and context design, evaluation, or agent workflows, and daily use of AI coding tools (e.g., GitHub Copilot, Cursor, Claude Code).

· Experience working hands-on in a team that builds and uses AI agents, with strong practices for review, quality, and security.

· Clear understanding of RESTful API design principles, including:Resource modeling and URI designCorrect use of HTTP methods and status codesIdempotencyPagination, filtering, and versioningAuthentication and authorizationConsistent error handlingAPI documentation (e.g., OpenAPI/Swagger)

· Strong proficiency in Python and in designing and building RESTful APIs.

· Working proficiency in React or a similar modern UI framework (such as Angular or Vue), and experience with TypeScript and Node.js.

· Strong knowledge of AWS architecture and services, with experience in DevOps, CI/CD pipelines, and infrastructure as code.

· Experience mentoring and supporting the growth of other engineers.

· Experience partnering with Product, Design, and cross-functional teams.

· Excellent communication skills, with the ability to give clear updates, provide direct feedback, and align stakeholders.

· Comfort operating in a fast-moving, ambiguous environment, making data-driven decisions as priorities evolve.

· A strategic mindset, with the ability to ensure technical decisions align with business goals.

· A Bachelor’s degree in computer science, engineering, or a related discipline, or equivalent practical experience.

Preferred Qualifications

· Experience shipping AI-driven or agentic systems in production, such as LLM orchestration, RAG and information retrieval, agent frameworks, and tool protocols (e.g., MCP), using LLM APIs (OpenAI, Anthropic) reliably at scale.

· Experience with agent evaluation, including testing, benchmarking, and monitoring agent behavior.

· Experience with Python frameworks such as Django, Flask, or FastAPI.

· Experience working across front-end, back-end, and AI engineering disciplines.

· A track record of helping teammates adopt new tools and ways of working.

· Exposure to legal or other regulated professional domains.

· AWS certifications, such as Solutions Architect or DevOps Engineer.

#LI-SB1

This posting is for proactive recruitment purposes and may be used to fill current openings or future vacancies within our organization.

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. For any eligible US locations, unless otherwise noted, the base compensation range for this role is $118,400 USD - $219,800 USD. For Ontario, Canada, the base compensation range for this role is $100,000 CAD - $145,000 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.

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 [email protected]. 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.

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More information about Thomson Reuters can be found on thomsonreuters.com