{"resource":{"author":{"id":"3eh0kijZwMrHum8TkMqX","name":"Devtools Tech","username":"devtoolstech"},"content":{"link":"","difficulty":4,"domain":2,"type":1,"isInternal":true,"body":"Note: This interview experience was contributed by a user of [devtools.tech](https://devtools.tech) platform. You can contribute your interview experiences [here](https://forms.gle/FsFk4YBaWjbLRThb6) and interview questions [here](https://forms.gle/Kve2m3bKHRCtKDKq5).\r\n\r\n## Round 1: DSA & Problem Solving\r\n\r\nThis was a coding round on a LeetCode-like platform. There were two medium and one hard problem.\r\n\r\nThe questions were around:\r\n\r\n- Comparing two linked lists\r\n- Longest substring without repeating characters (sliding window)\r\n- Sliding window maximum (deque-based optimization)\r\n\r\nTakeaway: They were looking for not just the final answer, but **how clearly you think and explain while coding**.\r\n\r\n## Round 2: JavaScript + Web & System Design\r\n\r\nThis round went deep into **real-world frontend engineering**. It covered:\r\n\r\n- JavaScript internals (closures, event loop, promises, async/await)\r\n- Writing polyfills from scratch ([Try Polyfill Questions](https://devtools.tech/questions/all?type=3&categories=polyfills&sort=stats.views%3Adesc))\r\n- Designing browser-like features\r\n- Performance, SSR, and SEO\r\n\r\nSome interesting problems included:\r\n\r\n* Implementing a Promise based retry method ([Exact Question Link](https://devtools.tech/questions/s/how-to-implement-auto-retry-promise-on-rejection-or-frontend-problem-sovling---qid---dUr6aT6OrbsBxdtA9EQV))\r\n* Designing a **browser history system** (back/forward by N steps)\r\n* Discussions around **SSR, LCP, and performance trade-offs**\r\n\r\nTakeaway: Focus on **scalability, performance, and design decisions** — not just getting the code to work.\r\n\r\n## Round 3: Hiring Manager\r\n\r\nThis was more about **engineering maturity and ownership**:\r\n\r\n* How to led frontend projects\r\n* Decisions around React, state management, and build tools\r\n* Working with designers, backend, and QA\r\n* Managing design systems at scale\r\n* Handling complex, data-driven UI in large e-commerce platforms\r\n\r\nIt felt more like a real engineering conversation than an interview.\r\n\r\n## Big takeaway\r\nAt the **SDE-3 level**, they look for people who can:\r\n\r\n- Write solid code\r\n- Understand how the web works\r\n- Design scalable frontend systems\r\n- And guide projects and people\r\n\r\n## Preparation Tips\r\n\r\nIf you’re preparing for similar roles:\r\n\r\n* Be strong with **DSA patterns** (sliding window, arrays, linked lists)\r\n* Go deep into **JavaScript internals & polyfills**\r\n* Understand **frontend system design** — SSR, caching, hydration, performance metrics","languages":[],"editorConfig":"undefined"},"stats":{"views":6075,"used":0,"likes":0},"description":"","published":true,"isActive":true,"tags":["javascript","ui","ux","devtools tech","coding"],"slug":"walmart-global-tech-frontend-interview-experience-sde-3---rid---p7M1epgvyBQeNoz32zr9","isPremium":false,"categories":[],"requires":[],"_id":"69662a4b132ce4e954b16208","title":"Walmart Global Tech Frontend Interview Experience (SDE 3)","resourceId":"p7M1epgvyBQeNoz32zr9","createdAt":1768303179176,"modifiedAt":1768303179176},"currentUser":null,"isOwner":false,"recommendations":{"questions":[{"_id":"642540c26577005718b79302","content":{"languages":["javascript","typescript"],"difficulty":1},"tags":["javascript","frontend","code","ui","ux","devtools tech","lodash","programming","coding","codedamn","egghead","frontend masters","aws","amazon","amazon frontend interview",""],"slug":"how-to-implement-deep-filter-functionality-or-aws-frontend-interview-question-or-javascript-or-problem-solving-or-amazon---qid---aGvxJwFTMSJBpOXqKXfw","title":"How to implement Deep Filter Functionality? | AWS Frontend Interview Question | JavaScript | Problem Solving | Amazon","questionId":"aGvxJwFTMSJBpOXqKXfw"},{"_id":"5ebfc56e584a3e6ac38acab2","content":{"difficulty":1,"languages":"javascript"},"tags":["node.js","javascript","arithmetic operators","frontend","js fundamentals","code","interview questions"],"title":"What would be the output of the following snippet? 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