A
Access Control (RBAC / ABAC)
Access control defines what users can do in your system—using role-based or attribute-based models to enforce permissions at scale.
Activity Feed
An activity feed is a distributed system that aggregates, ranks, and delivers user activity in real time—one of the most complex components in modern social apps.
C
Caching Strategies
Caching strategies improve performance by storing frequently accessed data closer to users—reducing latency and scaling social systems efficiently.
Content Delivery Network (CDN)
A CDN accelerates applications by delivering content from global edge servers—reducing latency and improving performance at scale.
Content Moderation
Content moderation ensures user-generated content (UGC) stays safe, compliant, and scalable—one of the most complex systems in social infrastructure.
E
Event-Driven Architecture
Event-driven architecture processes user actions as events—enabling real-time updates, scalable systems, and loosely coupled services in modern social applications.
Eventual vs Strong Consistency
Eventual vs strong consistency defines how quickly data updates propagate across systems—balancing performance, scalability, and accuracy.
F
Fan-out vs Fan-in
Fan-out and fan-in are two core strategies for building activity feeds—each with different tradeoffs in scalability, latency, and infrastructure complexity.
Feed Ranking
Feed ranking determines which content users see first—using scoring models, real-time signals, and personalization pipelines to maximize relevance and engagement.
I
Identity Layer
The identity layer manages users, authentication, and permissions—forming the foundation of secure, scalable social applications.
In-App Communities
In-app communities embed social interaction directly inside your product—driving engagement, retention, and network effects.
M
Message Queues
Message queues enable asynchronous communication between services—improving scalability, reliability, and system performance.
N
Network Effects
Network effects occur when a product becomes more valuable as more users join—driving exponential growth in social platforms.
Notification Systems
Notification systems deliver real-time alerts that drive engagement and retention—powered by event-driven infrastructure and personalization.
P
Personalization Engine
A personalization engine tailors feeds, notifications, and content in real time—driving engagement, retention, and user relevance at scale.
Pub/Sub (Publish–Subscribe)
Pub/Sub is a messaging pattern that enables real-time, event-driven communication between services—critical for scalable social infrastructure.
Push Notifications
Push notifications deliver real-time alerts to users—driving engagement, reactivation, and continuous interaction in modern apps.
R
Rate Limiting
Rate limiting controls how frequently users or systems can perform actions—protecting infrastructure, preventing abuse, and ensuring reliability at scale.
Real-Time Messaging
Real-time messaging enables instant communication between users—but requires complex infrastructure for delivery guarantees, ordering, and global scale.
Rented vs. Owned Audience
Rented vs owned audience defines whether you control your users—or depend on third-party platforms that can limit reach and access.
S
SDK vs API
SDKs and APIs both enable integration—but differ in abstraction, speed, and control. Choosing the right approach impacts development time, scalability, and product velocity.
Sharding
Sharding scales databases by splitting data across multiple nodes—enabling high performance and horizontal scalability in large systems.
Social Graph
A social graph models relationships between users and content—forming the foundation for feeds, recommendations, and network effects in social applications.
Social SDK
A Social SDK lets developers embed feeds, chat, and community features into apps—without building complex real-time infrastructure from scratch.
U
User Presence
User presence systems track whether a user is online, offline, idle, or active—enabling real-time experiences like messaging status, typing indicators, and live engagement.
W
WebSockets
WebSockets enable persistent, bidirectional communication between client and server—powering real-time features like chat, live feeds, and notifications.
White-Label Social SDK
A white-label social SDK lets you embed fully customizable social features into your app—without building infrastructure from scratch.
Z
Zero-Party vs First-Party Data
Zero-party vs first-party data defines how user data is collected—directly from users vs observed behavior—impacting personalization, privacy, and trust.