Collapsible Code Editor: Brace Matching and Toggle

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Quick Overview

This question tests stack-based parsing and stateful data structure design through a two-part brace-matching and collapsible editor problem. It evaluates practical algorithm implementation — specifically single-pass traversal and nested state management — skills commonly assessed in coding interviews for software engineering roles.

Collapsible Code Editor: Brace Matching and Toggle

Company: Jane Street

Role: Software Engineer

Category: Coding & Algorithms

Difficulty: medium

Interview Round: Technical Screen

Overview: This question tests stack-based parsing and stateful data structure design through a two-part brace-matching and collapsible editor problem. It evaluates practical algorithm implementation — specifically single-pass traversal and nested state management — skills commonly assessed in coding interviews for software engineering roles.

Read the full Jane Street Software Engineer interview experience this question came from

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Jane Street
Jun 4, 2026
mediumSoftware EngineerTechnical ScreenCoding & Algorithms
54
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