Design a system for a company to connect employees who share similar interests. Specify key features (profile creation, interest tagging, discovery, messaging), data model and storage choices, APIs, and the matching/recommendation approach. Discuss privacy and access controls for internal-only visibility, ranking signals, and how to handle cold start. Provide a high-level architecture (services, databases/search indices, cache, event/queue) and describe how it scales to tens of thousands of employees with near real-time updates as interests change. Outline monitoring/metrics and abuse prevention.

This question evaluates system design skills for building an internal interest-matching platform, including real-time scalable architecture, data modeling, API design, search and recommendation systems, messaging, and privacy/access controls.

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This is a hard difficulty System Design question, commonly asked during Technical Screen rounds at Palantir.

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Design an internal interest-matching platform

System Design Prompt: Internal Employee Interest Matching Platform

Context

Design an internal-only platform that connects employees with similar interests to foster collaboration, mentorship, and community. Assume a typical enterprise environment with SSO, an HR directory, and tens of thousands of employees. The system should provide near real-time updates when interests change.

Requirements

Features
1. Profile creation and editing
2. Interest tagging (free text with normalization and a suggested taxonomy)
3. Discovery and search (by tags, location, team, etc.)
4. Matching/recommendations (who should I connect with?)
5. Messaging (1:1 and small group)
Data model and storage choices
APIs (profile, interests, discovery, recommendations, messaging)
Matching and ranking approach (signals, algorithm)
Privacy and access controls (internal-only visibility, role/attribute-based)
Cold start strategy
High-level architecture (services, databases/search indices, cache, event/queue)
Scaling plan to tens of thousands of employees with near real-time updates
Monitoring/metrics and abuse prevention

Context

Requirements

Features

Profile creation and editing
Interest tagging (free text with normalization and a suggested taxonomy)
Discovery and search (by tags, location, team, etc.)
Matching/recommendations (who should I connect with?)
Messaging (1:1 and small group)

Data model and storage choices

APIs (profile, interests, discovery, recommendations, messaging)

Matching and ranking approach (signals, algorithm)

Privacy and access controls (internal-only visibility, role/attribute-based)

Cold start strategy

High-level architecture (services, databases/search indices, cache, event/queue)

Scaling plan to tens of thousands of employees with near real-time updates

Monitoring/metrics and abuse prevention

Design an internal interest-matching platform

Quick Overview

System Design Prompt: Internal Employee Interest Matching Platform

Context

Requirements

Solution

Submit Your Answer

Design an internal interest-matching platform

Quick Overview

System Design Prompt: Internal Employee Interest Matching Platform

Context

Requirements

Solution

Submit Your Answer