Lead Data Scientist
About the role
Hands-on applied ML expert building AI-driven risk, fraud, and compliance ML applications with a focus on production systems, feature engineering, and ML infrastructure within a hybrid work model.
Responsibilities
- Build risk & fraud ML applications: Deliver production ML models in fraud, trust & safety, KYB, and compliance domains, with measurable impact on customer workflows.
- Tackle hard data problems: Work on classification problems with extreme class imbalance, sparse signals, and “cold start” label challenges.
- Innovate in feature engineering & labeling: Use graph-based techniques, weak supervision, LLMs, and AI agents to improve signal extraction and automate labeling process.
- Establish ML infrastructure foundations: Partner with the ML infra team to design feature services, model training pipeline, model serving standards, and orchestration to scale multiple ML use cases.
- Design and implement knowledge graph solutions: Leveraging LLMs for graph construction, querying, and retrieval to enhance entity resolution and business identity use cases.
Qualifications
- 7+ years of production ML experience in one or more: building production ML for risk, fraud, credit, or trust & safety; knowledge graph applications; entity resolution for business or individual identities.
- Expertise in classification with real-world ML challenges (imbalanced labels, sparse signals, cold start, production version management).
- Hands-on ML infrastructure experience: feature stores, model management, ML training/serving pipelines.
- Comfort as a senior IC: setting technical direction, mentoring peers, and establishing best practices.
Skills
Benefits
- Middesk is committed to equitable and competitive compensation, including equity and benefits.
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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