Senior Data Scientist, AI Products

Wealthsimple

Senior Data Scientist handling AI product lifecycle for Wealthsimple. Working at the intersection of AI research and product development to create real-world impact for clients.

Posted 7/3/2026full-timeRemote • 🇨🇦 CanadaSenior💰 CA$151,000 - CA$189,000 per yearWebsite

About the role

Key responsibilities & impact

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 our model development stays aligned with user needs and technical feasibility.
Build and maintain production-grade training pipelines and evaluation harnesses using reproducible, well-tested code.
Analyze production feedback and user interactions to iteratively refine models and maximize value.
Foster a collaborative culture: mentor teammates, simplify complex problems, and drive iterative, high-impact delivery.

Requirements

What you’ll need

Deep product sense: define success metrics, translate vague business objectives into measurable hypotheses, and measure product impact through A/B testing and causal inference.
Experience with product analytics to derive actionable insights that inform product roadmaps.
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 designing, training, and shipping production AI models, with depth in transformer architectures and LLMs.
Solid fundamentals (attention, tokenization, embeddings, regularization) and failure mode analysis.
Familiarity with fine-tuning (LoRA, adapters), knowledge distillation, quantization, and instruction tuning.

Benefits

Comp & perks

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

ATS Keywords

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Hard Skills & Tools

A/B TestingCausal InferenceTransformer ArchitecturesLarge Language Models (LLMs)Attention MechanismsTokenizationEmbeddingsRegularizationKnowledge DistillationQuantization

Soft Skills

MentoringCollaborationProblem-SolvingCommunication