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Data Scientist, Risk & Fraud

Job in Toronto, Ontario, C6A, Canada
Listing for: Whatnot
Full Time position
Listed on 2026-06-17
Job specializations:
  • IT/Tech
    Data Analyst, Data Scientist, Machine Learning/ ML Engineer, Data Science Manager
Salary/Wage Range or Industry Benchmark: 180000 - 230000 CAD Yearly CAD 180000.00 230000.00 YEAR
Job Description & How to Apply Below

Whatnot is a livestream shopping platform and marketplace. We’re building the future of ecommerce, bringing together community, shopping and entertainment. We are committed to our values, and as a remote-first team, we operate out of hubs within the US, Canada, UK, Ireland, and Germany today.

We’re innovating in the fast-paced world of live auctions in categories including sports, fashion, video games, and streetwear. The platform couples rigorous seller vetting with a focus on community to create a welcoming space for buyers and sellers to share their passions with others.

And, we’re growing. Whatnot has been the fastest growing marketplace in the US over the past two years and we’re hiring forward-thinking problem solvers across all functional areas.

Role

In order to continue this growth, it’s important that Whatnot remains a safe and trusted space to interact and transact. We’re looking for a Data Scientist with expertise in fraud and risk to detect and prevent these threats to our community. You will:

  • Create rules and systems to enhance the full lifecycle of risk and fraud measurement. This can include: chargeback prevention, refund abuse detection and reduction, and measurement to capture the tradeoffs in reducing fraudulent and unsafe behavior on the platform
  • Define and own the experimentation playbook for Fraud at Whatnot.
  • Partner closely across the business to find improvements/opportunities and influence decisions using data science methodologies and tools.
  • Build actionable KPIs, create production-quality dashboards and notebooks to convey insights.
  • Define and advance best practices to enable system-level solutions to reduce fraud and payment risk.
  • Analyze the effectiveness of existing methods and partner with Machine Learning and Trust & Safety teams to develop better anti-fraud practices.
  • Inform the engineering, operations, and machine learning roadmaps through analysis of marketplace, user behavior, and product trends.

About You

We are looking for intellectually curious, highly motivated individuals to be foundational members of our Data team! You will partner with our Engineering, Product, and Operations teams to systematically detect, measure, and action against fraud and other threats to Whatnot’s platform.

You should have strong critical thinking and analytical skills, excellent communication abilities, and a knack for working across teams in a fast-paced environment. The ideal candidate will be adept in navigating the data stack and able to support initiatives in all facets from analytics/data engineering and product analytics to machine learning, ideally with previous experience within fraud-adjacent domains.

In addition to 5+ years of experience in the Data field, you should have:

  • 3+ years of experience in Data Analytics & Science supporting anti-fraud, risk, trust & safety, or integrity problems.
  • Excellent verbal communications, including the ability to clearly and concisely articulate complex concepts to both technical and non-technical collaborators
  • Bachelor’s degree in Computer Science, Economics, Statistics, or a related field, or equivalent work experience.
  • Industry experience with proven ability to apply scientific methods to solve real-world problems on large scale data
  • Ability to lead initiatives across multiple product areas and communicate findings with leadership and product teams
  • Comfortability with data warehouses and big data technologies such as Redshift, Snowflake, Big Query, Presto/Trino, Athena, Spark, DBT
  • Expert in using SQL for data analysis, reporting, and dashboarding
  • Experience with a scripting language such as Python or R
  • Aptitude and experience in applied statistical modeling and machine learning techniques
  • Firm grasp of visualization tools, interactive and self-serving, such as business intelligence and notebooks

Compensation

For US-based applicants: $180,000 - $230,000/year + benefits + stock options

The salary range may be inclusive of several levels that would be applicable to the position. Final salary will be based on a number of factors including, level, relevant prior experience, skills and expertise. This range is only inclusive of base salary, not benefits (more…

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