← Back to Directory

clickup

Mid-sized

ClickUp is a productivity and project management software company that offers an all-in-one platform for tasks, documents, goals, and team collaboration. It is known for consolidating multiple workplace tools into a single customizable application used by teams across various industries.

4 interview notes · updated Jul 2026

clickup·Software Engineer·Onsite - System Design / Architecture

Jul 2026
System design round at Clickup for a software engineer role. The whole interview was one big design question about a weekly email digest system, which sounds straightforward until you actually start pulling on the threads around rate limiting and deduplication.
  • Design a service that sends a weekly email digest of the top comments on each post to the post owner, where comment quality is scored by a rate-limited external ML service.

“I started with the happy path and immediately got pushed on the ML rate limiting piece.”

View Post

clickup·Software Engineer·Technical Phone Screen

Jun 2026
Clickup software engineer interview with a coding question around building a simple line-based document editor. Pretty straightforward on the surface but the edge cases are where they're really testing you.
  • Implement a line-based document editor that supports inserting a line at a given index and deleting the entire document. Given an initial document as an array of strings and a list of events, apply all events in order and return the final document.

“Looked simple and I kind of rushed into coding without thinking through the edge cases first.”

View Post

clickup·Software Engineer·Onsite - System Design / Architecture

Jun 2026
System design round at ClickUp for a software engineer role. The whole session was basically one big question about building a weekly email digest feature, and the rate-limited ML scoring service was the real crux of it. Trickier than I expected.
  • Design a system that sends each post owner a weekly email digest of their top comments, where comments are scored by a rate-limited ML service.

“I jumped straight into the happy path and started sketching a batch job that fires off all ML scoring requests on Sunday night.”

View Post

clickup·Software Engineer·Technical Phone Screen

Apr 2026
Interviewed for a Software Engineer role at ClickUp and got a coding problem about simulating a document editor with line-based insert and delete operations. Pretty niche problem, not your typical LeetCode array question.
  • You're given a document as a list of strings (one per line, 1-indexed) and a sequence of events. Each event is either an Insert (adding one or more lines at a given position, shifting existing lines down) or a Delete (removing a count of consecutive lines starting at a given position). Handle edge cases like inserting at line 0, inserting past the end, deleting past the end, deleting from an empty document, and empty content lists. Return the final document after processing all events.

“The line-number semantics tripped me up more than I expected.”

View Post