Dataford
Dataford
Top 27
Prep plan
Updated weekly · Last refresh Oct 17

ClickUp Backend Engineer Interview Questions

The questions to prepare for a ClickUp Backend Engineer interview. Questions from real interview reports rank first. Updated daily.

27questions
~4htotal time
Track your progressSign up free to work through all 27 questions and resume where you left off.
Start practicing free →
1
SQL & Data ManipulationStart here. 3 questions + 3 drills · ~54 min
Optimizing PostgreSQL Query PerformanceMedium

Explain how to improve slow PostgreSQL queries using execution plans, indexes, and query rewrites.

SubqueriesJoinsAggregationsClickUp
Optimizing Slow Queries at ScaleHard

Explain how to diagnose and optimize a slow PostgreSQL query on large Apidel Technologies datasets.

SubqueriesJoinsData WranglingClickUp
Connecting Users and GroupsEasy

Assesses your SQL modeling skills for many-to-many relationships and join design.

Joinsdatabase designClickUp
Calculate 30-Day User RetentionHard
Practice
Practice drill

Use CTEs, joins, and date filtering to calculate 30-day retention by signup cohort from login and feature usage data.

Window FunctionsDate FunctionsAggregationsCurefitIndeedTikTok
Database Schema DesignMedium
Practice
Practice drill

Audit user, application, and event relationships to validate completeness and referential integrity.

data relationshipsJoinsData WranglingMercer Francebet365
Top Customers by Net SalesMedium
Practice
Practice drill

Compute top 10 customers by net sales using joins and aggregations, ordering by revenue with deterministic tie-breaking.

SubqueriesJoinsData WranglingGain DigitalTCSZest AI
2
System Design16 questions · ~128 min
CRDTs vs Operational TransformsHard

Assesses your understanding of collaboration algorithms and their practical trade-offs.

ClickUp
High Availability on AWSMedium

Tests your approach to designing resilient backend services on AWS.

high availabilityfault toleranceawsClickUp
Hierarchy for Nested TasksMedium

Tests your data modeling and system design for hierarchical productivity features.

ClickUp
Real-Time Notifications at ScaleHard

Evaluates your ability to design large-scale real-time systems.

notification systemscalabilityClickUp
More System Design questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
3
Behavioral & Leadership8 questions · ~64 min
Mentoring While Delivering Critical WorkMedium

Tests mentorship under delivery pressure, focusing on prioritization, ownership, and how the candidate balances team growth with execution.

MentorshipTeam ManagementPrioritizationClickUp
More Behavioral & Leadership questions with a free account
The finish line: interview-readyComplete all 27 questions plus 3 hands-on drills to finish this plan.