System design

Atlassian System Design Questions

Every system design problem candidates reported at Atlassian between September 2025 and September 2026, most-asked first. Each one links to a full solution. Tick them off as you go.

Practice a Atlassian system design round with me

I'm Alex. I'll pick one of these Atlassian questions and interview you on it: scope, design, and deep dives.

11problems
11candidate reports
0asked more than once
16topics
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Topics

Design Monitoring and Reliability for 99.99% Availability
1 report · last seen Sep 2026ObservabilityData PipelinesStorage
Advanced+3▶ Mock
Design a distributed rate limiter service
1 report · last seen Feb 2026Rate LimitingDistributed SystemsAPI Design
Intermediate+9▶ Mock
Design a simple greeting-card web app
1 report · last seen Feb 2026API DesignStorageCDN
Beginner▶ Mock
Design a Data Stream Processor
1 report · last seen Feb 2026Data PipelinesReal-timeDistributed Systems
Intermediate▶ Mock
Design a scalable chatbot platform
1 report · last seen Jan 2026AI / MLReal-timeDistributed Systems
Advanced+2▶ Mock
Diagnose why a scaled system became slow
1 report · last seen Jan 2026ObservabilityDistributed SystemsDatabases
Intermediate▶ Mock
Compute top-N posts in a workspace
1 report · last seen Jan 2026AnalyticsReal-timeAlgorithms
Advanced+4▶ Mock
Design an image crawler for unlimited URLs
1 report · last seen Jan 2026Distributed SystemsStorageSearch
Advanced+2▶ Mock
Design an access control system (RBAC + resource-based)
1 report · last seen Jan 2026SecurityDatabasesAPI Design
Intermediate▶ Mock
Design a tagging system and REST APIs
1 report · last seen Jan 2026API DesignDatabasesSearch
Beginner▶ Mock
Store a hierarchy and return all children
1 report · last seen Jan 2026DatabasesAPI DesignAlgorithms
Intermediate▶ Mock

Duplicate reports of the same problem are merged and counted.

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Frequently Asked Questions

What system design questions does Atlassian ask?

Candidates reported 11 distinct system design problems at Atlassian between September 2025 and September 2026, including Design Monitoring and Reliability for 99.99% Availability, Design a distributed rate limiter service, Design a simple greeting-card web app.

How to prepare for Atlassian system design interview?

Start with the Atlassian problems reported most often, work through each full solution, then practice explaining a design end to end under time pressure in a mock interview.

What is the difference between HLD and LLD at Atlassian?

HLD (High-Level Design) focuses on system architecture, scalability, and component interactions. LLD (Low-Level Design) dives into class diagrams, API contracts, and database schemas. Atlassian tests both.