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50 System Design Concepts for Beginners in 90 Minutes [2026 Edition]
Learn 50 essential system design concepts in one place - scaling, CAP/PACELC, sharding, caching, queues, reliability patterns, and security. A fast…
Dec 6, 2025
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Arslan Ahmad
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System Design Interview Guide: Designing Scalable APIs (REST, Idempotency, & More)
Dec 23, 2025
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Arslan Ahmad
82
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16 Must Know API Concepts for Software Engineers
Nov 26, 2025
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Arslan Ahmad
78
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8
The 45-Minute System Design Interview Guide: A Step-by-Step Framework
Dec 30, 2025
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Arslan Ahmad
39
2
Why LLM Era Backend Design Looks Nothing Like Traditional System Design
Dec 21, 2025
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Arslan Ahmad
31
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Don't let System Design be the round that fails you.
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Split Brain Problem in System Design: Quorum, Fencing Tokens, and Network Partitions
What is Split Brain in system design? Learn how network partitions create two primary databases and the strategies engineers use to prevent data…
Jan 17
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Arslan Ahmad
11
2
Sharding vs. Vector Search: The System Design Guide to Scaling
Sharding handles scale, but vector indexing handles meaning. Discover why modern applications are moving toward high-dimensional search and how it works…
Jan 16
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Arslan Ahmad
8
3
Product Engineer vs. Full Stack: The Guide to the Industry's Newest Role
The tech job market is changing. Discover why "Product Engineers" are replacing pure backend roles. Learn the difference between output and outcome, how…
Jan 16
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Arslan Ahmad
9
The API Learning Roadmap: From Basic Concepts to System Design Architecture
A complete roadmap for learning API development. Master REST, GraphQL, gRPC, security best practices, and system design concepts for modern backend…
Jan 15
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Arslan Ahmad
10
2
1
3 System Design Projects That Will Get You Hired in 2026
Discover why the standard social media clone no longer works for portfolio differentiation. Learn how to select engineering projects that showcase true…
Jan 15
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Arslan Ahmad
10
3
System Design Basics: Mastering Idempotency for Technical Interviews
Stop duplicate API requests from breaking your data. Learn how to implement Idempotency Keys, handle network timeouts, and master the difference between…
Jan 15
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Arslan Ahmad
27
4
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Grokking System Design
Grokking System Design Fundamentals
A comprehensive course on system design fundamentals required for interviews and designing scalable systems.
Grokking the System Design Interview
Industry’s most trusted System Design Interview course, featuring video lectures, over 30,000 five-star reviews.
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System Design Interview Question
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Leveling Up to L5/L6: Why We Built "Grokking System Design Volume 2"
Ready for Senior or Staff engineering roles? Introducing "Grokking the System Design Interview: Volume 2." Master advanced architectural trade-offs with…
Jan 5
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Arslan Ahmad
10
4
The 45-Minute System Design Interview Guide: A Step-by-Step Framework
Master the system design interview with this 45-minute framework. Learn how to clarify requirements, estimate scale, draw high-level architecture, and…
Dec 30, 2025
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Arslan Ahmad
39
2
Designing Facebook Newsfeed in 45 Minutes: System Design Guide
Learn the system design secrets behind the Facebook Newsfeed. This guide explains how to balance read/write heavy workloads, implement consistent…
Dec 17, 2025
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Arslan Ahmad
13
1
Design YouTube in 45 Minutes: System Design Interview Guide
Learn how to design YouTube step-by-step in a system design interview. Covers full video pipeline, including adaptive bitrate streaming, handling…
Dec 16, 2025
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Arslan Ahmad
24
3
Behind the Follow Button: How Social Apps Handle Follows at Scale
A simple breakdown of what really happens when you tap Follow. Learn how systems store follow relationships, update feeds, send notifications, and scale…
Dec 15, 2025
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Arslan Ahmad
13
API
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The API Learning Roadmap: From Basic Concepts to System Design Architecture
A complete roadmap for learning API development. Master REST, GraphQL, gRPC, security best practices, and system design concepts for modern backend…
Jan 15
•
Arslan Ahmad
10
2
1
The 7 Pillars of API Design: Building for Developer Experience
Stop building fragile interfaces. Discover how to implement API versioning, input validation, and standard HTTP error codes to create systems that last.
Jan 14
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Arslan Ahmad
10
The Anatomy of an API: Request, Response, and Idempotency
Master the fundamental building block of modern software. Learn how APIs work, the difference between REST and GraphQL, and key system design concepts…
Jan 13
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Arslan Ahmad
15
3
The API Design Handbook: From RESTful Resources to Event-Driven Systems
Master the landscape of API patterns. Learn the critical differences between synchronous (REST, gRPC, GraphQL) and asynchronous (Webhooks, WebSockets…
Jan 9
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Arslan Ahmad
27
6
System Design Interview Guide: Designing Scalable APIs (REST, Idempotency, & More)
Stop treating APIs like random URLs. Master 7 senior-level API design patterns, including Resource-Oriented Design, Cursor Pagination, Idempotency, and…
Dec 23, 2025
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Arslan Ahmad
82
10
Database
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Beyond Relational: Understanding Vector Databases and NewSQL Architectures
Confused by database options? Master the differences between Relational, NoSQL, Key-Value, Graph, and Vector databases. Learn when to use PostgreSQL…
Jan 10
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Arslan Ahmad
24
3
1
SQL vs. NoSQL: The Definitive Decision Tree for System Design
Stop guessing which database to use. Master the trade-offs between SQL and NoSQL using our 4-step decision tree. Learn when to prioritize ACID over BASE…
Jan 4
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Arslan Ahmad
18
4
The End of the NoSQL Era? Understanding JSONB in PostgreSQL
Is NoSQL dead? Discover the hidden trade-offs between PostgreSQL JSONB and MongoDB. Learn about BSON vs. JSONB storage, the impact of Write…
Jan 3
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Arslan Ahmad
14
2
System Design Deep Dive: Connection Pooling, Latency, and PgBouncer
Understand the system design mechanics behind database connections. We explain process forking, memory exhaustion, and the benefits of multiplexing.
Jan 1
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Arslan Ahmad
28
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System Design 101: How to Scale Databases with Partitioning
Scale your database beyond a single server. Master the three core partitioning strategies, Range, Hash, and Directory-Based Sharding, and learn how to…
Dec 31, 2025
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Arslan Ahmad
15
System Design Fundamentals
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Split Brain Problem in System Design: Quorum, Fencing Tokens, and Network Partitions
What is Split Brain in system design? Learn how network partitions create two primary databases and the strategies engineers use to prevent data…
Jan 17
•
Arslan Ahmad
11
2
Sharding vs. Vector Search: The System Design Guide to Scaling
Sharding handles scale, but vector indexing handles meaning. Discover why modern applications are moving toward high-dimensional search and how it works…
Jan 16
•
Arslan Ahmad
8
3
System Design Basics: Mastering Idempotency for Technical Interviews
Stop duplicate API requests from breaking your data. Learn how to implement Idempotency Keys, handle network timeouts, and master the difference between…
Jan 15
•
Arslan Ahmad
27
4
System Design for AI: How Transformers and Vector Databases Work
Learn the difference between AI Agents and LLMs. This guide covers vector databases, embeddings, and context windows for system design candidates.
Jan 14
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Arslan Ahmad
11
3
Everything You Need to Know About Server-Sent Events (SSE) for System Design Interviews
Build real-time feeds without the complexity of WebSockets. Learn how Server-Sent Events replace inefficient polling, how to handle HTTP/2 connection…
Jan 13
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Arslan Ahmad
12
2
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