Senior Data Scientist (AI Products)

Join Wealthsimple, a leading financial technology company, as a Senior Data Scientist in the AI Products Data Science team. In this role, you will lead the full AI product lifecycle, design and execute rigorous experiments, and partner with cross-functional teams to translate business goals into a technical AI roadmap. You will also build and maintain production-grade training pipelines, analyze production feedback, and foster a collaborative culture. Enjoy a range of benefits, including retirement savings matching, company equity, paid parental leave, and top-tier health benefits.

• Lead the full AI product lifecycle, from identifying user pain points and defining KPIs to training foundation models and measuring real-world impact.
• Design and execute rigorous experiments (A/B tests, causal inference) to validate new AI features and drive product optimizations.
• Partner with Product Managers, Designers, and Engineers to translate business goals into a technical AI roadmap, ensuring model development stays aligned with user needs.
• Familiarity with fine-tuning (LoRA, adapters), knowledge distillation, quantization, and instruction tuning
• Experience designing, training, and shipping production AI models, with depth in transformer architectures and LLMs
• Solid fundamentals (attention, tokenization, embeddings, regularization) and failure mode analysis
• Proven track record of converting model outputs into business outcomes; comfortable communicating technical findings to cross-functional partners (PMs, designers, engineers) to drive alignment
• Experience with product analytics to derive actionable insights that inform product roadmaps
• Deep product sense: define success metrics, translate vague business objectives into measurable hypotheses, and measure product impact through A/B testing and causal inference
• Background in recommender systems, representation learning, or self-supervised learning; production LLM application development; open-source contributions or publications in AI