Senior Full Stack Engineer, Materia (Python + React)

Thomson Reuters; Toronto; Hybrid; CAD 100,000 - 145,000; Full time

Job summary

A global information provider located in Toronto seeks a Senior Product Engineer to develop AI-driven software that enhances accounting workflows. The ideal candidate will work across the full stack, including React and Python, while collaborating with product managers and designers. This on-site role offers a hybrid work model, competitive compensation ranging from $100,000 to $145,000 CAD, and comprehensive benefits.

Benefits

Hybrid Work Model

Flexible vacation

Career Development and Growth

Comprehensive benefit plans

Qualifications

• 4+ years of experience building web applications at scale.
• Strong hands-on experience in both front-end and back-end development.
• Experience building new products or features from ideation to release.

Responsibilities

• Own features from beginning to end, including ideation, testing, and launching.
• Build engaging front-ends using Next.js and TypeScript.
• Develop robust back-ends with Python and FastAPI.

Skills

React

Python

UI/UX Design

API Design

Cross-functional collaboration

Education

Bachelor's degree in Computer Science, HCI, or related field

Tools

FastAPI

Next.js

TypeScript

Tailwind CSS

Job description

Are you excited about building AI-driven software that redefines how professionals work? Have you developed solutions across the React and Python stacks? 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 Product Engineer, you will play a pivotal role in rapidly building and iterating on features that enhance accounting workflows and drive user engagement, from AI-powered capabilities to core product improvements, using data-driven experimentation to optimize outcomes.

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

Own the full stack—from React interfaces to Python-based AI services and APIs. You'll architect and implement complete features that bring generative AI capabilities to life, alongside core product capabilities that streamline and modernize accounting workflows. Crafting both the user-facing experiences and the intelligent systems that power them, 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 requirements into complete solutions—beautiful interfaces backed by robust APIs and services—will be key to our product's success.

About the Role

In this role as a Senior Full Stack Engineer, you will:

• Own features from beginning to end, including ideation, working with cross-functional partners in product and UX, testing, launching, measuring impact, and iteration.
• Build engaging front-ends using Next.js, TypeScript, and Tailwind CSS
• Develop robust back-ends with Python, FastAPI, Pydantic, and cloud infrastructure, including API design, data modeling, and AI service integration
• Identify bottlenecks and optimize for speed, scalability, and responsiveness across the full stack

Collaborate & Lead

• Serve as a technical leader on full stack projects, scoping out timelines, guiding junior engineers, and collaborating with cross-functional partners
• Contribute to technical design decisions across the stack, including architecture, API design, and system integration patterns
• Champion code quality and best practices for both front-end and back-end development

Champion UI/UX Excellence

• Apply strong design sensibilities to deliver polished, accessible, and user-centric interfaces.
• Proactively collect feedback from end users and internal stakeholders, and iterate accordingly

About You

You are a fit for a Senior Full Stack Engineer, if your background includes:

We're looking for engineers with strong hands‑on experience in both React and Python. While you should be capable in both front-end and back-end development, we value depth—whether you're a front‑end engineer who's grown into back‑end work, or a back‑end engineer who's passionate about user experience.

Experience & Skills

• 4+ years building web applications at scale, with practical experience in both front-end and back-end development (we welcome engineers who are stronger in one area but capable in both)
• Passion for UI/UX and product design—enjoy refining details that matter to users
• Self-driven with a proactive approach to problem-solving
• 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 communication and cross-functional collaboration abilities

Bonus Points

• Bachelor's degree in Computer Science, HCI, or related field
• Experience working in a startup or similar fast‑paced setting.
• Experience building Chatbot interfaces or other AI-native products
• Familiarity with large language models (LLMs), AI agent design, and/or prompt engineering
• Opinionated about testing methodologies, A/B testing, and safe rollouts

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.

#LI-SM2

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

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 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.

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.

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