Microsoft Frontend Interview Experience | 2026

Overview

Microsoft’s Frontend Engineer interview process is designed to evaluate both practical UI development and broader frontend engineering expertise. The 2026 process consisted of six rounds covering machine coding, advanced JavaScript, low-level design, problem solving, browser internals, and scalability.

The interview journey placed strong emphasis on the candidate’s ability to build maintainable user interfaces, reason about frontend architecture, solve complex problems, and understand the technologies that power modern web applications.

Interview Process

The interview process consisted of six rounds, with each stage assessing a different aspect of frontend engineering:

1. Machine Coding — A two-hour implementation round focused on building a functional user interface.
2. Advanced JavaScript — An assessment of JavaScript fundamentals and advanced language concepts.
3. Low-Level Design — A discussion focused on component architecture, code organisation, and design decisions.
4. Problem Solving — A round evaluating logical reasoning and the ability to solve programming problems.
5. Browser Internals — Questions covering how browsers process and render web applications.
6. Scalability — A discussion of how frontend systems can remain reliable and maintainable as usage grows.

The exact questions from the final five rounds were not specified, but the overall process clearly prioritised both hands-on implementation and architectural understanding.

Technical Rounds

Round 1: Machine Coding

The interview process began with a two-hour machine coding round. The candidate received a problem statement and, in some cases, a boilerplate project supplied as a compressed archive. The task required the candidate to build a functional interface within the allotted time while maintaining clean structure and practical usability.

Example problems included:

• Designing an email client similar to Outlook
• Creating a chat interface similar to Teams
• Building a notification system similar to Teams

The machine coding round primarily evaluated the following areas:

• UI engineering and implementation quality
• Component structuring and reusability
• Semantic HTML
• CSS architecture
• JavaScript problem solving
• Responsive design