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Principal Software Engineer - CoreAI

Microsoft

$139,900 - $304,200
Dec 12, 2025
Redmond, WA, US
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Improving the performance and reliability of customizing some of the world’s most advanced AI models, including GPT-4.1, GPT-5, and beyond, at Microsoft

Requirements

  • Coding experience in languages including, but not limited to, C, C++, C-Sharp, Java, JavaScript, or Python
  • Experience writing production code in building internet scale services and distributed systems
  • Engineering knowledge of machine learning systems and data pipelines
  • Ability to debug, read code and work on a large and increasing codebase
  • Experience with artificial intelligence (AI) tools for test automation
  • Knowledge of testing architectures used both across Microsoft and across the industry
  • Experience with automated source code analysis tools

Responsibilities

  • Leads by example across teams and mentors others to produce extensible, maintainable, well-tested, secure, and performant code used across products that adheres to design specifications.
  • Leads efforts to continuously improve code performance, testability, maintainability, effectiveness, and cost, while learning about and accounting for relevant trade-offs.
  • Creates and applies metrics to drive code quality and stability, appropriate coding patterns, and best practices.
  • Leads efforts on using debugging tools, tests, logs, telemetry, and other methods, and proactively leads verification of assumptions while developing code before issues occur across products in production.
  • Leverages minimal telemetry data, triangulates issues, and resolves with minimal iterations.
  • Owns and leads efforts and discussions for the architecture of aspects of complex products/solutions (e.g., design, cost).
  • Evaluates new technologies to solve classes of problems, and determines how to integrate these technologies within existing systems.

Other

  • Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience
  • Ability to meet Microsoft, customer and/or government security screening requirements
  • Excellent communication and presentation skills
  • Ability to work with Microsoft Cloud Background Check
  • Ability to pass the Microsoft background and Microsoft Cloud background check upon hire/transfer and every two years thereafter