Fraud Rules Engineer

About Us Visa is a world leader in payments technology, facilitating transactions between consumers, merchants, financial institutions and government entities across more than 200 countries and territories, dedicated to uplifting everyone, everywhere by being the best way to pay and be paid. At Visa, you'll have the opportunity to create impact at scale - tackling meaningful challenges, growing your skills and seeing your contributions impact lives around the world. Join Visa and do work that ma

Every new business that applies to Mercury is like a new star appearing in the night sky. On its own, it's a single point of light. But when we look closer, patterns emerge-data trails from partners, filings, founders, and financial histories-all connecting to form a larger constellation. That's what our Risk product engineering teams do at Mercury. We guide thousands of business applications through our systems-each one unique, each one needing a smooth and trustworthy landing. The challenge: k

Role: DevOps/SRE Engineer Experience Level: 5+ years proven experience in a combination of DevOps Engineering and SRE roles, with a strong emphasis on automation, CI/CD, and cloud-native technologies. Location: San Francisco; in-office at least 2x week (Tuesday & Friday), either at office or client office. Key Responsibilities - Develop and maintain automation tools for system health, performance, and reliability. - Participate in the design and implementation of scalable software or system arc

Position Summary What you'll do As a Principal Engineer in Walmart's Fraud and Risk platform, you will define and drive the architecture of next-generation fraud and risk prevention systems at massive scale. You will lead the design of platforms that combine real-time decisioning, entity intelligence, agentic AI, and human-in-the-loop workflows. This role requires deep technical leadership, owning architecture across systems and enabling teams to build scalable, intelligent, and explainable fr