Data Scientist
About the role
Data Scientist role at Middesk focusing on applying ML and data-driven methods to fraud, risk, and trust problems in a production environment. Hybrid work with in-office presence required 2 days/week in SF/NYC. 5+ years in fraud/risk/trust domains preferred.
Responsibilities
- Build fraud & risk systems Design and ship production systems that detect and prevent fraud across KYB, trust & safety, and compliance workflows.
- Work with messy, real-world data Tackle problems with extreme class imbalance, sparse signals, evolving adversarial behavior, and limited ground truth.
- Leverage relationships in data Apply graph-based approaches and entity resolution techniques to uncover hidden connections and improve risk detection.
- Improve signal & labeling Use a mix of heuristics, weak supervision, and modern AI tools (including LLMs where appropriate) to generate better features and labels.
- Help scale our infrastructure Partner with engineering to build and evolve systems for feature generation, model training, and production deployment across multiple use cases.
Qualifications
- 5+ years of experience in fraud, risk, or trust & safety
- Experience building and shipping production systems
- Strong foundation in applied ML or data systems
- Experience with graph or relational data approaches
- Hands-on and pragmatic – impact-driven, balanced on speed and reliability.
Skills
About Middesk
We make it easier for B2B companies to transact with one another
Middesk's mission is to enable every business to access the products and services they need to grow and thrive. We believe that if we can make it easy for a business to access financial products, hire new employees, and transact with other businesses, that we increase the odds of success for that business to contribute to its community and the broader economy. Our Identity provides accurate, complete information that financial services companies need to make efficient onboarding decisions. Our Agent product makes it easy for employers to file with the state and federal agencies needed to establish their business across the country. Our customers include Affirm, Brex, Plaid, Mercury, Divvy, Rippling, Gusto, and others. Based in San Francisco, CA, Middesk is backed by Sequoia Capital, Accel Partners, and Y Combinator.
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