Senior Data Scientist responsible for optimizing marketing performance through data-driven decision making at fintech leader Wealthsimple. Working on algorithms, analytics solutions, and cross-functional collaborations.
Responsibilities
Build data products and algorithms that optimize marketing performance—including budget allocation, targeting strategies, and campaign optimization across multiple channels.
Design and implement measurement strategies for marketing initiatives, including attribution modeling, incrementality analysis, and multi-touch attribution.
Drive marketing strategy through data insights, A/B testing, and causal inference methodologies to maximize ROI on marketing spend.
Develop and maintain analytics pipelines and data infrastructure, working collaboratively with data engineers and other data scientists.
Conduct exploratory analysis to identify growth opportunities, understand customer behavior, and optimize marketing tactics.
Provide business-as-usual analytics support including reporting, dashboards, and ad-hoc analysis for marketing stakeholders.
Leverage AI tooling to handle operational tasks efficiently and focus your expertise on high-impact strategic problems.
Partner with ad platforms (Google, Meta, etc.) and internal engineering teams to ensure robust tracking, data integration, and measurement capabilities.
Take ownership and ship it—continuously look for the simplest, most effective way to approach challenges; Occam's razor is your friend.
Requirements
Strong preference for prior experience working with marketing teams and paid advertising platforms (Google Ads, Meta Ads, programmatic advertising, etc.)
Understanding of digital marketing mechanics including attribution, ad platforms, tracking, and conversion optimization.
Strong technical skills in Python and SQL with experience building production-quality code.
Experience with measurement and attribution—ideally including building in-house attribution systems (not just using off-the-shelf tools like Google Analytics).
Proven track record in algorithm development, optimization problems, or building data-driven decision systems.
Strong foundation in causal inference, A/B testing, and experimental design.
Excellent communication skills and ability to translate complex technical concepts for non-technical stakeholders.
Has full-stack data science experience—comfortable with everything from dashboards and reporting to sophisticated algorithm development.
Can contribute to strategic direction in marketing analytics from day one with minimal ramp-up time.
Thrives in a collaborative, multi-faceted environment with ongoing alignment across stakeholders and data team members.
Is passionate about measurement and understanding what drives business outcomes—navigating the complexities of attribution and incrementality.
Ideally has worked at larger-scale tech companies that develop internal analytics and optimization systems.
Adjusts quickly to changing priorities and effectively manages complexity in a fast-paced growth environment.
Values simplicity and pragmatism—knows when to build sophisticated solutions and when a simpler approach will suffice.
Is eager to teach and learn. We value making each other successful!
Is a lifelong learner who's constantly seeking feedback to continue improving their craft
Benefits
Top-tier health benefits and life insurance
Long-term group savings with employer match using our Wealthsimple for Business platform
20 vacation days + 4 wellness days per year, and unlimited sick and mental health days
90 days away program: Employees can work outside of Canada for up to 90 days per calendar year
A wide variety of peer and company-led Employee Resources Groups (e.g., Rainbow, Women of Wealthsimple, Black @ WS)
Data Scientist developing machine - learning models for The Athletic’s sports media platform. Optimizing subscriptions, workflows, experiments, and personalized article recommendations.
Data Scientist at Desjardins, a financial services cooperative, developing advanced analytics, machine learning and AI models. Advising stakeholders and supporting data - driven business decisions.
Data Scientist building IFRS 9, behavioural, and predictive credit - risk models for Financeit’s Canadian point - of - sale financing platform. Automating analytics and translating borrower data into actionable risk insights.
Scientifique de données principal optimisant acquisition, fidélisation et monétisation chez Shakepay, plateforme canadienne de services financiers Bitcoin. Pilotage de l'expérimentation, de l'analyse statistique et des décisions de croissance.
Senior Data Scientist developing machine learning and LLM solutions for Qventus, transforming healthcare operations. Building production models, experiments, and data pipelines that improve patient outcomes.
Data Scientist developing statistical and machine learning algorithms to detect bots and fraud. Supporting HUMAN Security’s platform that protects enterprises and internet platforms from cybercrime.
Data Manager leading clinical - trial database, validation, reconciliation, and lock activities for ClinChoice, a global full - service CRO. Hybrid permanent role in Mississauga, Ontario.
Data Scientist developing and maintaining credit risk models for Desjardins, a financial cooperative. Advising teams on risk quantification, Basel/IFRS standards, and credit decisions.
Senior Data Scientist optimizing bidding, pacing, targeting, and budgets for Instacart’s grocery delivery and advertising marketplace. Driving experimentation and production algorithms that improve advertiser outcomes and platform revenue.