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Principal Software Engineer

United States, Washington, Redmond💼 Full-time💰 $165,600–$165,600🗓 2026-06-24 → 2026-10-02

Core

Build and operate mission-critical, hyperscale AI inferencing infrastructure powering Microsoft 365 and Dynamics 365 LLM services.

Role type

Principal Software Engineer (AI Infrastructure) (via careerplan.io/jobs/1970393556899902-principal-software-engineer-at-microsoft)

Builds

AI inferencing platform for Microsoft 365, Business & Industry Copilot, and other AI-powered products

Domain

Cloud Infrastructure / Large Language Models (LLMs)

Deliverable

production ML models | infrastructure

Required skills

Distributed systems design, Hyperscale cloud services, LLMs and AI orchestration, Event-driven architectures, High-scale storage systems, Python, C#, .NET

Preferred skills

Leading complex multi-team initiatives, Building and operating hyperscale cloud services (4+ years), Large-scale distributed systems experience

Technologies

Python, C#, .NET, LLMs, Vector databases

Responsibilities

Lead and mentor high-performing engineering teams, Drive design and delivery of the AI Inferencing platform, Own platform cost efficiency and operational excellence, Coach engineers on large-scale distributed systems, Collaborate across product and engineering teams to deliver AI solutions

Seniority

Principal, hands-on IC with strategic leadership