Clay·Software Engineer·Technical Phone Screen·Intermediate

Intermediate

Apr 2026

Summary

Clay coding round focused on designing a file system class from scratch. Pretty straightforward premise but there's more to think through than it first seems.

Questions Asked (1)

Design and implement a ClayWorkspace class that supports creating resources of different types under a parent folder, and listing all resources within a given folder.

System DesignData ModelingAPI & Integrations

Author's notes

The constructor and list method felt easy enough, but the create_resource part made me slow down.

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AI HintsAI Generated

Suggested Approach

Start by clarifying requirements and constraints, then design a data model that supports hierarchical folders and typed resources. Implement the ClayWorkspace class with methods for creating resources and listing resources, using appropriate data structures and error handling. Discuss trade-offs and potential extensions.

Pro tip: Demonstrate awareness of real-world concerns like concurrency, scalability, and API design consistency. Mention how you would handle edge cases such as duplicate names or invalid parent folders.

1. Clarify Requirements

Ask questions to understand the scope: What resource types? Are folders also resources? What operations are needed? Any constraints on performance or storage?

2. Design Data Model

Choose a representation for folders and resources. Consider a tree structure with parent-child relationships, and how to store resource types and metadata.

3. Define Class Interface

Outline the public methods of ClayWorkspace, such as createResource(parentFolderId, type, name, ...) and listResources(folderId). Specify parameters and return types.

4. Implement Core Logic

Write code for creating resources (validate parent, check duplicates, instantiate resource) and listing resources (traverse or query the data structure).

5. Discuss Extensions and Trade-offs

Talk about potential improvements like pagination, permissions, caching, and how the design would scale. Mention any assumptions made.

Key Points to Mention

Use of a tree or graph data structure to model folder hierarchy
Resource type as an enum or class hierarchy for extensibility
Validation: parent folder existence, duplicate resource names, circular references
Efficient listing: direct children vs. recursive, indexing for performance
Error handling and return types (e.g., exceptions vs. result objects)
Consideration for concurrency and thread safety if multiple users

AI-generated suggestions, not part of the candidate's original notes. May be inaccurate — verify before relying on them.