Senior Software Engineer
Microsoft Corporation
Redmond, WA
Job posting number: #7319128 (Ref:ms-1896652)
Posted: October 25, 2025
Job Description
On the Microsoft Defender for Office team (MDO), we are responsible for delivering a cloud-based email and message filtering service that protects customers from advanced threats (malware, phish, fraud and spam) in Microsoft’s email and Teams collaboration workloads. MDO provides investigation, threat hunting and remediation capabilities that allow security teams to efficiently identify, prioritize, investigate, and respond to threats.
Security has never been more important at Microsoft, and the Defender for Office (MDO) team operates at the forefront of our company’s investments to protect customers as they navigate an ever-changing security landscape. In the MDO team, we focus on detecting malicious activity (malware, phish, fraud and spam), responding rapidly and neutralizing the threat.
Our team is seeking a Senior Software Engineer to work in our Foundations organization. You will be responsible for helping build the next iteration of services that will support MDO into the future. This include optimizing our existing architecture for major value savings, embracing new technologies and architectures to enhance MDO's product agility and raising the security & quality bar for the product as a whole.
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.
 
                    

