Data Scientist, Fraud

Stripe; Toronto; On-site; CAD 110,000 - 160,000; Full time

Job summary

Stripe in Toronto seeks a Data Scientist for the Fraud Data Science team. You’ll build and improve models powering fraud detection and loss management across Stripe’s payments platform.

You’ll work with Fraud Engineering and Risk Operations to move models from research to production, applying supervised/unsupervised ML, statistics, causal inference, optimization, and experimentation to shape fraud strategy. Strong communication and collaboration across cross‑functional teams are essential.

Qualifications

• PhD with 1-3 years, MS with 2-6 years, or BS with 4-8 years of data science or quantitative modeling experience.
• Experience with Fraud, Risk or Financial Crimes.
• Proficiency in SQL and Python or R.
• Experience working with cross-functional teams to deliver results.
• Ability to communicate results clearly and drive impact.
• Ability to manage multiple projects with high attention to detail.
• Strong business acumen and ability to translate analyses into actions.
• Proficiency with AI tools to accelerate model development and analysis.

Responsibilities

• Build and improve models powering Stripe's fraud detection and loss management.
• Collaborate with Fraud Engineering and Risk Operations to move models from research to production.
• Use supervised/unsupervised ML, statistics, causal inference, optimization, and experimentation to inform fraud strategy.
• Surface insights that shape risk decisions across Stripe's payments platform.

Skills

Fraud domain knowledge

SQL

Python

R

Cross-functional collaboration

Communicating results

Project management

Business acumen

AI tools

Education

PhD/MS/BS in quantitative field

Tools

Python

R

SQL

Spark

Hadoop

AI tools

Job description

Who we are

About Stripe

Stripe is a financial infrastructure platform for businesses. Millions of companies—from the world's largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Our mission is to increase the GDP of the internet, and we have a staggering amount of work ahead. That means you have an unprecedented opportunity to put the global economy within everyone's reach while doing the most important work of your career.

About the team

Our Data Science team partners deeply with teams across Stripe to ensure that our users, our products, and our business have the models, data products, and insights needed to make decisions and grow responsibly. We're looking for data scientists with a passion for analyzing data, building machine learning and statistical models, and running experiments to drive impact. Our Fraud, Losses, and Financial Crime Data Science team builds the models and data products that protect Stripe and its users from fraud, account takeover, and financial crime. We own the full fraud and loss modeling stack - from account takeover detection and card fraud classification to merchant-level loss estimation, unsupervised anomaly detection, and financial crime risk modeling. We partner with Fraud Engineering, Financial Crimes Engineering, and Risk Operations to bring these systems into production and ensure they have measurable impact on Stripe's financial integrity and user trust.

What you'll do

We're looking for a Data Scientist to join the Fraud Data Science team. In this role, you'll build and improve the models that power Stripe's fraud detection and loss management systems. You'll work closely with Fraud Engineering and Risk Operations to move models from research to production, and you'll use data to surface insights that shape fraud strategy across the business.

Data scientists on this team apply supervised and unsupervised machine learning, statistical modeling, causal inference, optimization, and experimentation to some of the most consequential risk problems in global payments.

Who you are

We're looking for someone who meets the minimum requirements to be considered for the role. If you meet these requirements, you are encouraged to apply. The preferred qualifications are a bonus, not a requirement.

Minimum requirements

• PhD with 1-3 years, MS or MA with 2-6 years, or BS or BA with 4-8 years of data science or quantitative modeling experience
• Experience with Fraud, Risk or Financial Crimes
• Proficiency in SQL and a computing language such as Python or R
• Experience in working with cross-functional teams to deliver results
• Ability to communicate results clearly and a focus on driving impact
• A demonstrated ability to manage and deliver on multiple projects with a high attention to detail
• Strong business acumen and experience in synthesizing complex analyses into actionable recommendations
• Proficiency with AI tools to accelerate model development, analysis, and coding

Preferred qualifications

• Strong knowledge and hands‑on experience in several of the following areas: machine learning, statistics, optimization, causal inference, and experimentation
• Experience deploying models in production and adjusting model thresholds to improve performance
• Experience designing, running, and analyzing complex experiments or leveraging causal inference designs
• A builder's mindset with a willingness to question assumptions and conventional wisdom
• Experience with distributed tools such as Spark, Hadoop, etc.
• A PhD or MS in a quantitative field (e.g., Statistics, Engineering, Mathematics, Economics, Quantitative Finance, Sciences, Operations Research)