Home/Blog

Engineering Articles & Insights

In-depth guides on backend API design, database performance tuning, authentication patterns, and modern full-stack development by MD Hasan (MD Hasan Akon).

Unlocking High-Performance Vector Search: Implementing Sub-Millisecond Similarity Queries in PostgreSQL with pgvector
•6 min read•PostgreSQL

Unlocking High-Performance Vector Search: Implementing Sub-Millisecond Similarity Queries in PostgreSQL with pgvector

Learn how to build scalable AI-powered vector search directly inside PostgreSQL using pgvector, optimizing HNSW indexes and query performance for production applications.

PostgreSQLNode.jsTypeScriptAI
Read Full Article →
Optimizing PostgreSQL Connection Pooling in Node.js Under High Concurrency
•6 min read•Backend Development

Optimizing PostgreSQL Connection Pooling in Node.js Under High Concurrency

Learn how to eliminate database bottlenecks in high-concurrency Node.js applications by mastering PostgreSQL connection pooling strategies, sizing heuristics, and lifecycle management.

Node.jsPostgreSQLTypeScriptSystem Design
Read Full Article →
Architecting Event-Driven Microservices with RabbitMQ and TypeScript: Handling Backpressure and Dead Letter Queues
•6 min read•Backend Development

Architecting Event-Driven Microservices with RabbitMQ and TypeScript: Handling Backpressure and Dead Letter Queues

Learn how to build resilient, production-ready event-driven microservices in TypeScript using RabbitMQ, featuring robust backpressure control and dead letter queues.

Node.jsTypeScriptRabbitMQMicroservices
Read Full Article →
Implementing Resilient Rate Limiting in Distributed Node.js Systems with Redis and Lua
•5 min read•System Design

Implementing Resilient Rate Limiting in Distributed Node.js Systems with Redis and Lua

Learn how to build a high-performance, atomic distributed rate limiter in Node.js using Redis and Lua scripting to prevent race conditions at scale.

Node.jsTypeScriptRedisSystem Design
Read Full Article →
Zero-Downtime PostgreSQL Schema Migrations in High-Throughput Node.js Applications
•8 min read•PostgreSQL

Zero-Downtime PostgreSQL Schema Migrations in High-Throughput Node.js Applications

Learn how to execute high-throughput PostgreSQL schema migrations without downtime using lock timeouts, concurrent indexing, and the expand-contract pattern in Node.js.

PostgreSQLNode.jsTypeScriptDatabase
Read Full Article →
Building Production-Grade Webhook Ingestion Engines in Node.js and Redis
•7 min read•Backend Development

Building Production-Grade Webhook Ingestion Engines in Node.js and Redis

Learn how to build an enterprise-grade webhook ingestion system featuring cryptographic signature verification, async queueing, guaranteed idempotency, and dead-letter queues using Node.js, TypeScript, and Redis.

Node.jsTypeScriptRedisBackend Development
Read Full Article →
Mastering Distributed Tracing and Context Propagation in Node.js Microservices
•8 min read•Backend Development

Mastering Distributed Tracing and Context Propagation in Node.js Microservices

Learn how to architect a production-grade distributed tracing system in Node.js using AsyncLocalStorage and OpenTelemetry to correlate logs and trace requests across complex microservice boundaries.

Node.jsTypeScriptMicroservicesSystem Design
Read Full Article →