Principal Software Engineer

Overview

Software engineers on the Edge Web Platform team build foundational technologies that shape how hundreds of millions of people experience the web and AI-powered computing. Edge operates at a massive scale and extends beyond a traditional browser as a gateway to Microsoft’s products and AI ecosystem. This role offers the opportunity to shape a widely used web platform by advancing performance and user experience.

As a principal engineer on the Rendering team, you will shape the core primitives of the web platform - advancing DOM, HTML, and emerging web APIs. You will help drive web standards, collaborate with the broader standards community, and deliver interoperable implementations that improve browsing across Microsoft Edge and Chromium.

We are seeking engineers with solid systems thinking and deep interest in browser architecture, especially DOM tree construction and mutation, eventing, editing and form controls, selection and ranges, and accessibility semantics. In this role, you will design and own core platform features that shape how web content is represented, and experienced by millions of customers daily, with a focus on correctness, performance, and compatibility at web scale.

You will work on initiatives central to Edge’s web platform strategy, collaborating with standards bodies (WHATWG/W3C), community groups, other browser vendors, and internal teams to bring new capabilities to the platform. Success in this role requires depth in browser or runtime systems and end-to-end ownership from exploration and prototyping to shipping.

Microsoft’s mission is to empower every person and every organization on the planet to achieve more. As employees we come together with a growth mindset, innovate to empower others, and collaborate to realize our shared goals. Each day we build on our values of respect, integrity, and accountability to create a culture of inclusion where everyone can thrive at work and beyond.

Starting January 26, 2026, Microsoft AI (MAI) employees who live within a 50-mile commute of a designated Microsoft office in the U.S. or 25-mile commute of a non-U.S., country-specific location are expected to work from the office at least four days per week. This expectation is subject to local law and may vary by jurisdiction.

Responsibilities

Drive high-quality API design across Microsoft and the broader web ecosystem, including through standards forums, to improve interoperability.

Contribute directly to Chromium in areas that can be shared across Chromium-based browsers.

Deliver web platform innovations in key browser engine areas, grounded in customer and developer needs.

Qualifications

Required Qualifications:

Bachelor's Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++ and/or Rust OR equivalent experience.

Other Requirements

Ability to meet Microsoft, customer and/or government security screening requirements are required for this role. These requirements include but are not limited to the following specialized security screenings:

• Microsoft Cloud Background Check: This position will be required to pass the Microsoft Cloud background check upon hire/transfer and every two years thereafter.

Preferred Qualifications

Master's Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelor's Degree in Computer Science or related technical field AND 12+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience.

Experience contributing to large-scale software engineering projects.

Experience with the Chromium codebase and web standards.

Solid design, coding, and debugging skills in C++.