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Software Engineer

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Microsoft Corporation

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Location:
Spain , Barcelona

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

Not provided
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Job Description:

At the core of Microsoft Ads is a mission-critical, high-throughput real-time bidding (RTB) platform. It processes millions of auction requests per second and runs complex auction decisioning under strict latency constraints, directly influencing revenue, win rate, partner satisfaction, and overall reliability. This role leads the platform’s architectural and technical evolution with a focus on modernization, performance, scalability, experimentation infrastructure, and operational excellence. It requires deep expertise in low-latency distributed systems, proven leadership in large-scale refactoring and modernization programs, and strong cross-functional collaboration with engineering, data science, experimentation, and business stakeholders. The engineer in this role drives initiatives with company-level impact, ensuring the platform can scale and evolve to support future Microsoft Ads growth.

Job Responsibility:

  • Own technical direction and execution for core components of Impbus, a high-scale, latency-sensitive real-time bidding service at the heart of Microsoft Ads
  • Lead design and implementation of scalable, high-performance backend systems operating under strict latency and reliability requirements
  • Drive platform modernization and long-term sustainability of critical services, improving code quality, maintainability, and operational safety
  • Ensure performance, scalability, and stability of the service as traffic, data volume, and business requirements continue to grow
  • Define and evolve instrumentation, observability, and experimentation capabilities to support data-driven decision making and safe production changes
  • Collaborate closely with cross-functional partners (engineering, data science, experimentation, product, and infrastructure) to align technical solutions with business goals
  • Provide technical leadership and mentorship, influencing architecture decisions and engineering best practices across teams

Requirements:

  • Bachelor's Degree in Computer Science or related technical field AND technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience
  • Experience working on high-throughput, production systems where scalability, latency, and stability are critical
  • Demonstrated ability to design, evolve, and maintain complex systems over time
  • Experience collaborating with cross-functional teams to deliver solutions aligned with business needs
  • Problem-solving skills and ability to analyze and address performance or reliability issues in production environments

Additional Information:

Job Posted:
January 31, 2026

Employment Type:
Fulltime
Work Type:
On-site work
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