Senior Software Developer, LLM Infrastructure

Build something people loveWealthsimple 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 $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.We're proud of what we've built — and we're just getting started. Read our Culture Manual and learn more about how we work.Machine Learning Infrastructure TeamThe Machine Learning Infrastructure team builds the core foundation powering AI and GenAI initiatives across Wealthsimple. As our AI footprint expands, our priority is building scalable, cost-effective infrastructure that enables high-performance inference using open-source models alongside vendor solutions. Our responsibilities are to:Build and maintain infrastructure to host and serve open-source LLMs reliably on cloud/GPU systems.Implement intelligent model-routing frameworks to optimize performance, cost, and latency.Develop evaluation and benchmarking tooling (Evals) to test, validate, and compare model performance across use cases.Set the technical direction for operating scalable LLM infrastructure company-wide.The RoleAs a Senior Software Engineer on the ML Infrastructure team, you will design and implement the c