Senior Software Engineer - AI (Materia AI) Are you excited about building AI-driven software that redefines how professionals work? 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

Senior Software Engineer , you will play a pivotal role in developing AI-powered systems that enhance accounting workflows through automation, intelligence, and seamless orchestration.

About the Role In this role as a

Senior Software Engineer,

you will:

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 work with top AI and software development experts, leveraging cutting-edge technology to build intelligent and scalable systems. This role is for the

CoCounsel for Tax and Accounting team , formed from the recent acquisition of the startup

Materia .

Build AI-Driven Systems Design and implement backend services that power generative AI agents and orchestration systems. This role requires both creativity and rigor to ensure our AI-driven solutions are performant, reliable, and adaptable to real-world use cases.

Collaborate Across Functions Work closely with AI/ML engineers, frontend developers, product managers, and designers to build robust services that support generative AI experiences. Help to build out our core AI interfaces such as Conversations, Workspaces, Grid, and Knowledge Base.

Key Responsibilities Backend Development & AI Integration

Design and build the backend for AI-native products focused accounting research and accounting workflows such as tax filing, tax advisory,



and audit.

Develop and maintain backend services using Python, FastAPI, and PostgreSQL.

Implement AI orchestration systems integrating LLMs from OpenAI, Anthropic, and other providers.

Design APIs and backend logic for real-time AI interactions.

Performance & Scalability

Ensure backend systems are secure, scalable, and optimized for AI-driven applications.

Monitor and enhance system performance, across millions of documents and AI driven interactions

Collaboration & Leadership

Work closely with AI researchers, engineers, and product teams to translate AI capabilities into real-world applications.

Foster a culture of experimentation and continuous improvement, exploring new AI technologies and methodologies.

About You

You are a fit for the position of

Senior Software Engineer

if your background includes:

Required Experience & Skills

Bachelors Degree in Computer Science, Computer Engineering, Related Field, or Equivalent Experience

4+ years of experience in backend development, building scalable web services and APIs.

Robust Python skills, with experience in FastAPI, PostgreSQL, and AWS.

Experience in distributed systems, API and data model design.

Strong debugging skills and a track record of building production-grade software.





Strong communication and cross-functional collaboration abilities.

Passion for AI-driven software and new engineering paradigms.

A creative problem solver who enjoys exploring new technologies.

Dedicated to building high-quality, reliable AI-first systems.

Comfortable working in a fast-paced, evolving environment.

Preferred Skills & Experience

Experience with AI-driven systems, agent-based architectures, or AI APIs from providers like OpenAI and Anthropic.

Knowledge of vector databases, embeddings, or search-based AI.

Strong opinions on backend testing strategies and automation.

#LI-TH1

What’s in it For You?

Hybrid Work Model:

We’ve adopted a versatile 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.

Ind

📌 Senior Software Engineer (Toronto)
🏢 Thomson Reuters
📍 Toronto