The Principal Software Engineer role in the Copilot Security Engineering team focuses on addressing complex AI security challenges. This team is integral to Microsoft's mission of delivering secure and trusted AI experiences. The engineer will lead the design and implementation of security-focused systems while collaborating with various teams to enhance Microsoft's security posture. The position requires a balance of hands-on technical work and leadership to drive effective engineering practices.

• Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.
• Ability to meet Microsoft, customer and/or government security screening requirements.
• Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

• Design and implement distributed systems that deliver security-focused improvements and mitigations.
• Set engineering direction for services and tooling supporting adversarial testing, model evaluation, risk measurement, and secure deployment workflows.
• Ensure that security mitigations and architectural changes meet high standards for availability, reliability, security, performance, and scalability.
• Champion best practices in threat modeling, observability, automation, and sustainable engineering.
• Partner with security researchers, red teams, applied scientists, and product teams to translate risks into actionable engineering plans.
• Work closely with PM/TPM partners on roadmaps, prioritization, and delivery commitments.
• Represent Copilot Security Engineering in architecture reviews, risk assessments, and cross-team security initiatives.
• Deliver engineering capabilities that increase detection coverage and accelerate time-to-mitigation.
• Drive simplification, reusable patterns, and platform approaches that scale across Microsoft's AI ecosystem.
• Communicate technical strategy, progress, risks, and results clearly to leadership and partner teams.

• Employees at Microsoft are often offered comprehensive, “world-class” benefits—including health and mental-wellness programs, competitive pay with bonuses and stock awards, and retirement/savings options. Time-off and flexibility are common, with generous vacation and holidays, parental and caregiver leave, and flexible work schedules, alongside learning support, employee resource groups, product discounts, and matching-gifts/volunteering programs. Specific benefits can vary by region.