Principal Software Engineer - CoreAI | Microsoft Careers

Microsoft

Actively hiring

US Posted 68 days ago Apply by Sep 22, 2026 $139,900–$274,800 / year

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At a glance

AI generated

TL;DR

As a Principal Software Engineer - CoreAI on the Microsoft Playwright team, you will lead the development and implementation of systems that integrate AI-native capabilities into test automation. Your daily work involves designing and enhancing Playwright’s runtime, infrastructure, and tooling to support autonomous agents in generating and validating software behavior across various platforms. You’ll collaborate closely with GitHub and VS Code teams to deliver robust testing solutions that are deeply integrated into the modern developer workflow, serving millions of users globally. This role requires expertise in languages such as C++, Java, JavaScript, and Python, along with extensive experience in AI LLM models, browser engineering, and network security. Your contributions will help redefine software quality standards by enabling intelligent automation at scale.

Skills

Python JavaScript C# Java C++ OpenAI Azure AI ML Browser Engineering Network Security CI/CD

What you'll do

Leads the development and documentation of design for complex systems in test automation.
Mentors team members to create scalable and maintainable code across multiple products.
Collaborates with stakeholders to align project plans, ensuring cross-product feature integration.
Acts as Designated Responsible Individual (DRI), monitoring system health and addressing issues proactively.
Drives the adoption of new technologies and best practices for improving product performance.

What we're looking for

Bachelor's Degree in Computer Science or related field and over 10 years of technical engineering experience.
Expertise in coding languages such as C, C++, C#, Java, JavaScript, and Python.
At least 3 years of hands-on experience with AI LLM models like OpenAI and Azure AI.
Proven experience in browser engineering and network security.
Ability to lead the development of design documents for complex products or platforms.
Extensive knowledge in mentoring engineers and ensuring code extensibility and maintainability.

Market check

Salary context

Competitive pay

How this pay compares to similar roles

Similar $196k

This role $207k

$124k most similar roles pay here $291k

This role pays more than 61% of similar roles. Most pay $177,250–$214,500 — the shaded band above. At the midpoint, this role pays about $207k versus about $196k for comparable roles.

Based on 240 similar postings.

Employer

About Microsoft

Microsoft Corporation is a global technology leader producing software, hardware, and cloud services including Windows, Office 365, Azure cloud platform, Xbox gaming, and Surface devices. Industry: Software & Cloud Computing

Microsoft currently has 532 open roles on FindRole.

Microsoft

WA 49 days ago $142,800–$274,800

Python Kubernetes Docker Prometheus OpenTelemetry Grafana NCCL CUDA C C++ C# Java JavaScript Terraform CI/CD

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