Senior Service Engineer - Fraud Detection & Security Engineering

Microsoft Advertising is the destination for experienced, collaborative, and passionate digital professionals seeking a rewarding career and environment to thrive. We offer a compelling portfolio of products, innovative solutions, and the opportunity to engage with some of the brightest minds in the digital industry. We are the engine that powers the buying and selling of Search, Native, Display and Video advertising across Microsoft’s digital consumer portfolio, empowering advertisers and partners around the world to achieve their paid digital marketing goals on the Microsoft Advertising platform.

The Advertising Support, Trust and Safety (ASTS) team plays a critical role in protecting users, advertisers, and publishers across Microsoft Advertising. We drive platform integrity and ecosystem health through security, traffic quality, and policy enforcement strategies aligned to advertising and publisher standards. People are our greatest asset— we are deeply committed to personal and professional growth, building an inclusive and high-performing team culture, and enabling every individual to do their best work while delivering meaningful business impact.

As a Senior Service Engineer in Advertising Trust and Safety, you will operate as a senior technical contributor within a team of experts responsible for the health, reliability, and security of the Microsoft Advertising ecosystem. You will take ownership of complex, ambiguous problem spaces and drive end-to-end resolution, from deep technical investigation to long-term platform improvements. You will combine service engineering, security, and software development expertise to analyse large-scale data and detect anomalous behaviour across the advertising ecosystem. You will lead complex investigations, including fraud and traffic quality, identifying systemic patterns and driving mitigations that protect advertiser ROI and user safety.

You will also design scalable, production-grade solutions—leveraging automation, tooling, and AI—to improve detection, reduce operational effort, and strengthen platform integrity and resilience

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Starting January 26, 2026, Microsoft AI (MAI) employees who live within a 50-mile commute of a designated Microsoft office in the U.S. or 25-mile commute of a non-U.S., country-specific location are expected to work from the office at least four days per week. This expectation is subject to local law and may vary by jurisdiction.