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. Strong Preference For Candidates With • Hands-on ownership building production products from 0→1 • Python backend depth (FastAPI/Django/APIs/microservices) • Scalable distributed systems • Product engineering mindset • Customer-facing feature ownership • React/TypeScript capability to support full-stack delivery • Startup or greenfield experience • Engineers who can independently design, build, and deliver systems in production Frontend experience is required, but this is NOT a frontend-heavy/UI-focused role. We need backend-first engineers who can also contribute across the stack when needed. == Are you excited about building AI-driven software that redefines how professionals work? Have you built scalable Python backend systems that power customer-facing products? Join a dynamic and highly skilled team at Thomson Reuters, where we combine the agility and innovation of a startup with the stability and resources of a global leader. As a Lead Product Engineer, you will play a pivotal role in designing and building the backend services and APIs that power AI-driven accounting workflows, while contributing across the full stack to rapidly iterate on features, drive user engagement, and optimize outcomes through data-driven experimentation. Innovate in a Startup-Like Environment Be part of a fast-moving, forward-thinking group that is creating AI-driven software for accounting professionals. You'll join a team of top engineers and AI developers, leveraging cutting-edge technology to build intelligent and scalable systems. This role is for the CoCounsel for Accounting team, formed from the recent acquisition of the startup Materia. Create Impactful, AI-Driven Experiences Lead backend-driven full stack initiatives — from Python-based AI services and APIs to the React interfaces that bring them to life. You'll architect and implement complete features that deliver generative AI capabilities, alongside core product systems that streamline and modernize accounting workflows. Building the intelligent backend systems and connecting them to polished user experiences, your work will shape how thousands of accounting professionals leverage AI and modern software in their everyday workflows. Collaborate Across Functions Work closely with product managers, designers, and AI specialists to deliver elegant, high-performance features. Your ability to translate complex