Engineering Notes

Thoughts on backend engineering, distributed systems, databases, messaging systems, cloud-native architectures, and software design. These notes capture concepts, trade-offs, and engineering decisions that shape production-grade software.

Featured

Featured Engineering Notes

A curated collection of articles covering backend development, distributed systems, software architecture, and production engineering.

Cloud & DevOps2026-08-1114 min read

CI/CD Explained

Learn how Continuous Integration and Continuous Delivery automate software builds, testing, and deployments to improve development speed and reliability.

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Cloud & DevOps2026-08-1015 min read

Kubernetes Explained

Learn how Kubernetes automates container deployment, scaling, self-healing, and orchestration for modern cloud-native applications.

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Cloud & DevOps2026-08-0913 min read

Docker Explained

Learn how Docker packages applications into containers, why containers are different from virtual machines, and how Docker simplifies development and deployment.

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System Design2026-08-0815 min read

Saga Pattern Explained

Learn how the Saga Pattern manages distributed transactions across multiple microservices without relying on traditional two-phase commit protocols.

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System Design2026-08-0714 min read

CQRS Explained

Learn how Command Query Responsibility Segregation (CQRS) separates read and write operations to improve scalability, performance, and maintainability in distributed systems.

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System Design2026-08-0613 min read

API Gateway Explained

Learn how API Gateways simplify microservice communication by handling routing, authentication, rate limiting, request aggregation, and security.

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System Design2026-08-0514 min read

Load Balancers Explained

Learn how load balancers distribute traffic, improve availability, eliminate single points of failure, and enable modern distributed systems to scale efficiently.

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Databases2026-08-0413 min read

Database Sharding Explained

Learn how database sharding enables horizontal scalability, distributes data across multiple servers, and helps backend systems handle millions of users efficiently.

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Databases2026-08-0314 min read

Database Indexing Explained

Learn how database indexes improve query performance, how B-Tree indexes work, and the trade-offs every backend engineer should understand before adding an index.

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Messaging2026-08-0212 min read

Kafka Partitions Explained

Understand how Kafka partitions enable horizontal scalability, message ordering, fault tolerance, and parallel event processing in distributed systems.

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Messaging2026-08-0112 min read

Kafka Consumer Groups Explained

Learn how Kafka Consumer Groups enable horizontal scalability, fault tolerance, and parallel event processing in modern distributed systems.

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Distributed Systems2026-07-3110 min read

How Redis Makes a URL Shortener Fast

A practical look at using Redis in a distributed URL shortener to reduce database load, improve redirect latency, handle cache misses, and design an efficient cache-aside strategy.

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Databases2026-07-309 min read

PostgreSQL vs MongoDB

Comparing relational and document databases, their trade-offs, and when to choose PostgreSQL or MongoDB for production systems.

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Databases2026-07-298 min read

Redis Is More Than a Cache

Understanding how Redis is used for caching, distributed locking, pub/sub, rate limiting, and session management in modern backend systems.

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Messaging2026-07-2810 min read

Why Kafka over RabbitMQ?

A practical comparison between Kafka and RabbitMQ, covering architecture, scalability, ordering guarantees, throughput, and when each technology should be used.

Read Note

Latest

Latest Notes

Recently published engineering notes exploring technologies, patterns, and design decisions from modern backend systems.

Cloud & DevOps2026-08-1114 min read

CI/CD Explained

Learn how Continuous Integration and Continuous Delivery automate software builds, testing, and deployments to improve development speed and reliability.

Read Note
Cloud & DevOps2026-08-1015 min read

Kubernetes Explained

Learn how Kubernetes automates container deployment, scaling, self-healing, and orchestration for modern cloud-native applications.

Read Note
Cloud & DevOps2026-08-0913 min read

Docker Explained

Learn how Docker packages applications into containers, why containers are different from virtual machines, and how Docker simplifies development and deployment.

Read Note
System Design2026-08-0815 min read

Saga Pattern Explained

Learn how the Saga Pattern manages distributed transactions across multiple microservices without relying on traditional two-phase commit protocols.

Read Note
System Design2026-08-0714 min read

CQRS Explained

Learn how Command Query Responsibility Segregation (CQRS) separates read and write operations to improve scalability, performance, and maintainability in distributed systems.

Read Note
System Design2026-08-0613 min read

API Gateway Explained

Learn how API Gateways simplify microservice communication by handling routing, authentication, rate limiting, request aggregation, and security.

Read Note
System Design2026-08-0514 min read

Load Balancers Explained

Learn how load balancers distribute traffic, improve availability, eliminate single points of failure, and enable modern distributed systems to scale efficiently.

Read Note
Databases2026-08-0413 min read

Database Sharding Explained

Learn how database sharding enables horizontal scalability, distributes data across multiple servers, and helps backend systems handle millions of users efficiently.

Read Note
Databases2026-08-0314 min read

Database Indexing Explained

Learn how database indexes improve query performance, how B-Tree indexes work, and the trade-offs every backend engineer should understand before adding an index.

Read Note
Messaging2026-08-0212 min read

Kafka Partitions Explained

Understand how Kafka partitions enable horizontal scalability, message ordering, fault tolerance, and parallel event processing in distributed systems.

Read Note
Messaging2026-08-0112 min read

Kafka Consumer Groups Explained

Learn how Kafka Consumer Groups enable horizontal scalability, fault tolerance, and parallel event processing in modern distributed systems.

Read Note
Distributed Systems2026-07-3110 min read

How Redis Makes a URL Shortener Fast

A practical look at using Redis in a distributed URL shortener to reduce database load, improve redirect latency, handle cache misses, and design an efficient cache-aside strategy.

Read Note
Databases2026-07-309 min read

PostgreSQL vs MongoDB

Comparing relational and document databases, their trade-offs, and when to choose PostgreSQL or MongoDB for production systems.

Read Note
Databases2026-07-298 min read

Redis Is More Than a Cache

Understanding how Redis is used for caching, distributed locking, pub/sub, rate limiting, and session management in modern backend systems.

Read Note
Messaging2026-07-2810 min read

Why Kafka over RabbitMQ?

A practical comparison between Kafka and RabbitMQ, covering architecture, scalability, ordering guarantees, throughput, and when each technology should be used.

Read Note