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Principal Software Engineer

United States, Washington, Redmond💼 Full-time🗓 2026-05-05 → 2026-10-02

Core

Design and develop creative, cutting-edge systems and services at scale to support worldwide operations, focusing on infrastructure security improvements and AI-driven engineering solutions.

Role type

Principal Software Engineer (Infrastructure Security & AI)

Builds

Cloud services, large distributed systems, and security solutions for high-scale workloads (via careerplan.io/jobs/1970393556862615-principal-software-engineer-at-microsoft)

Domain

Cybersecurity, Cloud Infrastructure, Artificial Intelligence (LLM/ML)

Deliverable

production ML models | infrastructure

Required skills

C, C++, C#, Java, JavaScript, Python, AI/LLM/ML engineering, large distributed systems design, cloud service scaling, infrastructure security, system architecture, technical leadership, mentoring

Preferred skills

None stated

Technologies

C, C++, C#, Java, JavaScript, Python

Responsibilities

Lead architecture, design, and implementation of high-scale, low-latency services with an AI-first approach; drive infrastructure security improvements for mission-critical workloads; conduct in-depth triage, troubleshooting, and forensics across the cloud stack; lead definition of requirements, KPIs, and planning for engineering deliverables; mentor and grow a diverse team of senior, mid-level, and entry talent

Seniority

Principal, hands-on IC with mentorship responsibilities