Senior Software Developer, Financial Risk, Toronto

Wealthsimple is Canada’s leading financial innovator. 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 $125 billion inassets under administration. The company was founded in 2014 by a team of financial experts and technology entrepreneurs, and is headquartered in Toronto, Canada.

About The Team We build the products and infrastructure that millions of Canadians trust with their financial lives. Data&Engineering at Wealthsimple spans everything from the client-facing apps to the systems running underneath them— and we hold ourselves to a high bar on both. We move fast, but we build thoughtfully: quality, security, and scalability aren't trade-offs here, they're the standard. If you want to work on hard problems with people who care deeply about craft, you'll fit right in.

About The Role Financial risk sits at the heart of what makes Wealthsimple trustworthy. The Financial Risk engineering team is responsible for the systems that protect our clients and our platform— from fraud detection to AML compliance to the client experience when things go wrong. It's technically complex, genuinely consequential work, and the team is growing to meet it.

You’ll join a lean, high-ownership team and take on meaningful scope from day one — building fraud defenses, client-facing resolution flows, and the internal tooling that keeps our operations team moving efficiently.

In this role, you’ll have the opportunity to:

Design and build fraud detection systems that protect clients and Wealthsimple from bad actors— across transaction monitoring, account behaviour, and beyond

Own the client-facing experience for accounts affected by fraud restrictions, including self-serve resolution flows that get clients back on track as quickly and frictionlessly as possible

Build and improve internal tooling that helps our operations team investigate and resolve fraud cases efficiently

Develop risk-based product features— such as dynamic transaction limits — that reflect a client's actual risk profile

Contribute to systems and processes that keep Wealthsimple compliant with anti-money laundering (AML) regulatory requirements

Work closely with product, design, and operations partners to translate complex risk logic into experiences that feel simple to the people using them

What you bring:

4+ years of software engineering experience, ideally in a consumer-facing product environment

Strong backend engineering skills, with a track record of building reliable, scalable systems

Experience working on fraud detection, financial risk, or other high-stakes technical domains

Comfort across the stack— you're as comfortable contributing to a client-facing flow as you are to the systems running underneath it; experience with Ruby on Rails or Kotlin is a strong asset

Strong software quality practices: you write testable code, take production ownership seriously, and raise the bar in code review

Clear communicator who can work effectively with non-engineering partners across operations, compliance, and product

AI-first mindset. You leverage AI tools to accelerate development, improve code quality, and solve problems more effectively. You have already evolved your workflow through AI and are eager to continue innovating.

Nice to have:

Experience with Apache Flink or other stream processing frameworks

Familiarity with real-time data pipelines and event-driven architecture

Experience with React Native

Experience with Temporal for workflow orchestration

Hands-on experience with AI-assisted development tools such as Claude Code or Cursor, including agentic workflows and MCP integrations

Background in fintech, banking, or another regulated industry

Who you are:

You take ownership end-to-end— from writing the code to making sure it works in production

You're comfortable with ambiguity and operate well in a domain where the rules are real but the problems are rarely clean

Detail-oriented without losing sight of the bigger picture— you care about correctness, but you also want the experience to feel right for the client on the other side of it

Collaborative by default— you share context early, ask questions before you're stuck, and don't disappear into a hole for two weeks

Curious about the systems you're building and the risks you're mitigating— not just the code, but the why behind it

Benefits

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

90 days away: work outside Canada for up to 90 days per year

Employee resource groups, including Rainbow (2SLGBTQ), Women of WS, and Black at WS

We are a hybrid team with over 1,500 employees across North America. The people are one of the best parts of working here: you'll collaborate with incredibly talented, curious, and driven teammates who are deeply committed to doing great work.

Compensation Range: CA$151.2K - CA$189K

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.

Accessibility Statement We’re committed to an accessible hiring experience. If you need any accommodations throughout the interview process, please let us know — we’ll work with you to make sure you have what you need. We also welcome any feedback on how we can better accommodate candidates with accessibility needs.

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. These tools assist our team but don’t replace human judgment – all final hiring decisions are made by people. If you have questions about how your data is used, reach out to us.

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