Senior Software Developer, Financial Risk

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 defences, 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

Why Wealthsimple? 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.