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From the employer's careers site First seen 25 Oct 2026

Staff, Fraud Countermeasures

Wealthsimple Remote (Canada) Remote staff Full time

The employer hasn't listed a salary.

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Description

Wealthsimple is Canada's leading financial innovator, offering a full suite of simple, sophisticated financial products. The Fraud Countermeasures team is part of Data Science, focusing on balancing fraud losses with client friction.

The role:

  • Own fraud strategy and execution across application, transaction and account takeover fraud for Wealthsimple's card products.
  • Manage the card fraud loss budget and guard against fraud attacks.
  • Design, backtest, ship and tune detection rules, and set decision thresholds on ML risk scores.
  • Weigh fraud losses prevented against operational cost and client experience.
  • Partner with Product and Engineering to build controls that stop fraud without blocking legitimate clients.
  • Guide data scientists and analytics developers in your pod, and mentor junior teammates.

Requirements:

  • 6+ years of experience in fraud prevention, including 3+ years working directly on card fraud.
  • Hands-on ownership of card fraud strategy.
  • Advanced SQL skills.
  • Experience building, backtesting, shipping and tuning fraud rules.
  • Ability to quantify fraud savings against operational and client experience costs.
  • Experience using AI tools.
  • Strong communication skills.

Nice to have: Knowledge of Visa and Mastercard network rules, dispute processes and chargeback rails.

Benefits:

  • Top-tier health benefits and life insurance
  • Long-term group savings with employer match
  • 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

Skills

Required

  • fraud prevention
  • card fraud
  • SQL
  • fraud rules
  • AI tools
  • communication

Nice to have

  • Visa and Mastercard network rules
  • dispute processes
  • chargeback rails

Ready to apply?

You apply with the employer directly. Their original posting is here: https://jobs.ashbyhq.com/wealthsimple/937c2a7a-4b2a-4525-8737-0c92a02f6f06

Apply on Wealthsimple