Software Engineer - Backend

Microsoft • Redmond, WA

2d • Hybrid

About The Position

The Bing Ads Delivery System team builds and operates the large‑scale, low‑latency systems that power Microsoft Advertising. Our services run globally, sit on the critical revenue path, and must be highly reliable, efficient, and correct.
We’re looking for a Senior Software Engineer passionate about distributed systems, high‑performance C++, and building production‑grade services with a solid customer‑obsessed and live‑site‑first mindset.
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.

Requirements

• Bachelor's Degree in Computer Science or related technical field AND 4+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

Nice To Haves

• Master'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 Bachelor'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 equivalent experience.
• Experience building and operating large‑scale, high‑availability systems.
• Proven ability to debug and operate complex production systems.
• Willingness to learn new technologies and continuously grow skills.
• Solid ownership, teamwork, and customer focus.
• Experience with ads systems, search, or other real‑time decision systems.
• Background in performance optimization and distributed infrastructure.

Responsibilities

• Design and build large‑scale distributed systems for real‑time ads delivery.
• Write high‑performance, reliable C++ code in latency‑critical services.
• Own services end to end: design, coding, testing, deployment, monitoring, and live‑site operations.
• Drive improvements in performance, scalability, availability, and reliability.
• Troubleshoot live‑site issues and strengthen system resiliency.
• Collaborate with partner teams across Ads Serving, Ranking, and Infrastructure.

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Number of Employees: 5,001-10,000 employees