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The Trade Desk

Large Enterprises

The Trade Desk is a technology company that provides a self-service, cloud-based demand-side platform enabling advertisers and agencies to plan, manage, and optimize digital advertising campaigns across channels such as display, video, audio, and connected TV. It is a major publicly traded player in the programmatic advertising industry, known for its data-driven approach and independence from major media owners.

2 interview notes · updated Jul 2026

The Trade Desk·Software Engineer·Technical Phone Screen

Jul 2026
Interviewed for a software engineer role at The Trade Desk and got a frontend JavaScript question that felt more like a quick knowledge check than a real coding challenge.
  • Given an HTML page with a button element, write JavaScript to attach a click event listener using document.querySelector and addEventListener so that clicking the button logs its text content to the console. Also explain what e.target refers to in that context.

“Pretty straightforward DOM stuff.”

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The Trade Desk·Software Engineer·Technical Phone Screen

Apr 2026
Interviewed for a SWE role at The Trade Desk and got a system design question about extending an LRU cache with a custom eviction policy. Pretty niche problem, felt like it was testing whether you actually understood the internals rather than just knowing the textbook definition.
  • Design a custom policy extension for an LRU Cache. How would you modify or extend the standard implementation to support pluggable or configurable eviction strategies?

“My first instinct was to just describe a doubly linked list plus hashmap setup, which is the standard answer, but that wasn't really the point.”

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