Lead Software Engineer – Python​/React

Lead Product Engineer (Full Stack), Materia AI

This role is heavily backend focused (roughly 70% backend / 30% frontend). We are specifically looking for engineers who have built and shipped real products end‑to‑end, not just contributed small features within large organizations.

As a Lead Product Engineer, you will design and build the backend services and APIs that power AI‑driven accounting workflows, and contribute across the full stack to rapidly iterate on features, drive user engagement, and optimize outcomes through data‑driven experimentation. The position is backend‑leaning full‑stack with a primary focus on scalable backend services and APIs for customer‑facing product features.

• Design, build, and maintain backend services powering generative AI products such as Conversations, Accounting Research, Ready to Advise, and Work spaces.
• Develop robust backend systems with Python, FastAPI, Pydantic, and cloud infrastructure, including API design, data modeling, system architecture, and AI service integration.
• Own complex, 6+ month projects from ideation through launch, measuring impact, and iteration.
• Contribute to front‑end development using Next.js, Type Script, Tailwind CSS to connect interfaces to backend services.
• Identify bottlenecks and optimize performance, scalability, and responsiveness across the full stack.
• Serve as a technical leader for backend‑driven projects, making prioritization decisions and guiding engineering teams.
• Set and enforce team‑wide frameworks, best practices, and code quality standards for both backend and frontend.
• Mentor and develop junior and mid‑level engineers through code reviews and technical guidance.
• Drive high standards for backend reliability, API design, and system performance.
• Apply strong product sensibilities to deliver polished, accessible, user‑centric experiences.

• 7+ years building web applications at scale, with deep backend development experience.
• Strong proficiency in Python and backend frameworks (FastAPI, Flask, or Django) with experience designing scalable APIs and services.
• Comfortable contributing to front‑end development with React, Next.js, and Type Script.
• Appreciation for good UI/UX and product design — care about the end‑user experience.
• Self‑driven with a proactive approach to problem‑solving and prioritization.
• Experience building new products or features from 0 to 1 or from ideation to release.
• Excellent debugging skills and an eye for performance optimization.
• Strong leadership and cross‑functional collaboration abilities.

• Startup or greenfield experience.
• Experience with AI‑native products, chatbot interfaces, or API‑driven platforms.
• Familiarity with large language models (LLMs), AI agent design, or prompt engineering.
• Experience with cloud infrastructure, event‑driven architectures, or observability tooling.
• Opinionated about testing methodologies, A/B testing, and safe rollouts.
• Bachelor’s degree in Computer Science or related field.

Thomson Reuters complies with local laws that require upfront disclosure of the expected pay range for a position. The base compensation range for this role in the eligible U.S. locations is $118,400 USD – $219,800 USD. For the Canadian location, the base range is $140,600 CAD – $190,600 CAD. The role may also be eligible for an annual bonus based on performance.

• Hybrid Work Model – 2–3 days a week in the office for office‑based roles.
• Flexibility & Work‑Life Balance – work from anywhere for up to 8 weeks per year.
• Career Development and Growth – continuous learning and skill development.
• Industry Competitive Benefits – flexible vacation, two company‑wide Mental Health Days off, Headspace app access, retirement savings, tuition reimbursement, employee incentive programs, and resources for mental, physical, and financial wellbeing.
• Culture – inclusion and belonging, flexibility, work‑life balance.
• Social Impact – two paid volunteer days off annually and ESG initiatives.

We are a registered equal opportunity employer. We seek talented, qualified employees in all our operations around the world regardless of race, color, sex/gender, pregnancy, gender identity and expression, national origin, religion, sexual orientation, disability, age, marital status, citizenship, veteran status, or any other protected classification under applicable law. Thomson Reuters is proud to be an Equal Employment Opportunity Employer and provides a drug‑free workplace.

We make reasonable accommodations for applicants with disabilities and other protected characteristics.