Machine Learning Engineer

Senior Applied Scientist We're looking for a Senior Applied Scientist to help drive the future of credit applied science at Ramp. In this role, you will design, build, and optimize the models that power our credit risk systems, helping us make faster, smarter, and more scalable risk decisions for our customers. You'll work at the intersection of machine learning, statistics, economics, and product strategy. This role requires strong technical depth as well as close collaboration with business, product, data, and engineering partners. You will help identify high-impact opportunities, translate ambiguous business problems into rigorous modeling work, and ship models that operate reliably in production. Applied scientists at Ramp focus on solving quantitative problems across credit, fraud, growth, and our core product by applying the right mix of machine learning, causal inference, structural modeling, and optimization. What You'll Do Design, build, and optimize machine learning models that support credit risk decisioning and portfolio management at Ramp Own the full applied science development lifecycle, from data exploration and feature development to model prototyping, deployment, monitoring, and iteration Investigate and evaluate new data sources, including structured and unstructured data, and integrate them into credit models where appropriate Develop backtesting, validation, and monitoring frameworks to evaluate model performance and business impact Apply methods from machine learning, statistics, causal inference, optimization, and economics to solve core business problems Generate and communicate data-driven insights that influence product, risk, and company strategy Partner with product, business, engineering, and data stakeholders to translate ambiguous problems into clear objectives, scoped opportunities, and a practical applied science roadmap Contribute to best practices for model development, experimentation, documentation, testing, and production reliability What You Need Bachelor's degree or above in Math, Economics, Bioinformatics, Statistics, Engineering, Computer Science, or other quantitative fields. 5+ years of industry experience as an Applied Scientist, Machine Learning Engineer, Research Scientist, or equivalent; or 3+ years of industry experience with a PhD Strong familiarity with the mathematical fundamentals of advanced statistics, machine learning, optimization, and/or economics Experience working with large datasets using Python and SQL Strong Python experience across exploratory data analysis, predictive modeling, and applied machine learning, using tools such as NumPy, pandas, scikit-learn, PyTorch, or similar libraries Strong communication: the ability to bridge technical methodology to meaningful data narratives to drive company decisions and strategy Track record of shipping high-quality machine learning products in production and at scale Ability to thrive in a fast-paced, constantly improving, start-up environment that focuses on solving problems with iterative technical solutions Nice-to-Haves PhD in Math, Economics, Bioinformatics, Statistics, Engineering, Computer Science, or other quantitative fields Strong perspective on data science engineering development cycle (data modeling, version control, documentation + testing, best practices for codebase development) Familiarity with data orchestration platforms (Airflow, Dagster, Prefect) Experience at a high-growth startup Experience leveraging AI/LLMs for development or for internal workflows Benefits Available to All Full-Time Ramp Employees (Global) Flexible PTO Centralized home-office equipment ordering Health and wellness stipend Budget for intra-office travel Weekly coffee stipend United States 100% medical, dental & vision insurance coverage for you, with partial coverage for dependents One Medical annual membership 401(k), including employer match on contributions made while employed by Ramp Fertility HRA (up to $10,000 per year) Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay Pet insurance In-office perks: lunch, snacks, drinks, and more Relocation support to NYC or SF (as needed) Canada Group medical, dental, and vision coverage through Sun Life Life, AD&D, and disability coverage Fertility drug coverage (up to $4,000 lifetime) Group Retirement Plan with employer match (RRSP + DPSP) Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay, with additional time available at reduced pay Employee Assistance Program and virtual care through Lumino Health United Kingdom Private medical insurance through Freedom Elite Virtual GP and at-home care via eMed x Livi Workplace pension through Penfold, with salary sacrifice option Parental leave: up to 16 weeks (birthing + bonding) or 8 weeks (bonding only) at 100% pay with additional time available at reduced pay Referral Instructions If you are being referred for the role, please contact that person to apply on your behalf. Other Notices Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records. Beware of recruiting scams: Ramp will only contact you through official @ Ramp.com email addresses and will never ask for payment or sensitive personal information during the hiring process. Ramp Applicant Privacy Notice Paribus (Ramp)