The company offers a full suite of simple, sophisticated financial products across managed investing, do-it-yourself trading, cryptocurrency, tax filing, spending and saving. Wealthsimple currently serves more than 4 million Canadians and holds over $155 billion in assets under administration. The company was founded in 2014 by a team of financial experts and technology entrepreneurs, and is headquartered in Toronto, Canada.
As a Senior Software Developer on the Tax team, you will work across the stack to build, improve, and operate products that help Canadians complete their tax obligations with confidence. You will take meaningful projects from discovery and technical design through implementation, launch, and iteration. You'll help shape technical direction, raise engineering standards, and mentor teammates while contributing directly to production code. can work comfortably across frontend and backend systems; Own complex, end-to-end engineering projects, from problem definition and technical design through delivery and ongoing improvement.
Build and maintain full-stack experiences using React on the frontend and Python on the backend. Contribute to existing frontend code, including legacy jQuery and Backbone components, while helping the team modernize and simplify the codebase over time. Design and operate reliable services and integrations that support tax filing, reporting, and other critical client workflows.
Make thoughtful decisions about architecture, testing, observability, security, and maintainability. Use AI-native development workflows to improve the speed and quality of design, implementation, debugging, and programming. Raise the technical bar through design reviews, code reviews, documentation, pairing, and mentorship.
Help create a culture of transparent communication, learning, and shared ownership. Significant professional software engineering experience, with a track record of shipping and operating production systems.
Strong full-stack development experience, including React or a comparable modern frontend framework.
Professional experience with Python, or demonstrated ability to become productive quickly in Python-based systems.
Experience leading complex technical projects and breaking ambiguous problems into clear, deliverable steps. Strong engineering fundamentals, including API design, automated testing, debugging, monitoring, and operational excellence. The ability to collaborate effectively with technical and non-technical partners in a regulated or high-trust environment.
An AI-first development workflow that uses tools such as Claude thoughtfully while maintaining engineering rigor and accountability for the final result.
Experience in fintech, tax, accounting, payments, or another regulated financial-services domain. Familiarity with Canada Revenue Agency processes, tax reporting, or tax-filing products.
Experience modernizing or migrating legacy frontend codebases. Top-tier health benefits and life insurance ~ Long-term group savings with employer match, through Wealthsimple for Business ~20 vacation days, 4 wellness days, and unlimited sick and mental health days per year ~Employee resource groups, including Rainbow (2SLGBTQ), Women of WS, and Black at WS That means we're always looking for better ways to work - whether that's new tools, AI, or rethinking how we approach a problem. We don't expect you to have all the answers, but we do expect curiosity and a willingness to evolve alongside the products we're building.
Inclusion Statement: We're building products for a diverse world, and we need a diverse team to do it well. We strongly encourage applications from everyone, regardless of race, religion, colour, national origin, gender, sexual orientation, age, marital status, or disability status.
AI in Hiring: We may use artificial intelligence (AI) tools to support parts of our hiring process, such as reviewing applications, analyzing resumes, or assessing responses.
📌 Senior Software Developer - Tax (Toronto)
🏢 Doist
📍 Toronto