Hello. My name is A.R. ZERIN. I am an Entrepreneur, Technology Optimist and a Software Engineer from Dhaka, Bangladesh .
Programming is my passion. Life is beautiful, so I am trying hard to enjoy it.
I have completed my Undergraduate Degree in Computer Science & Engineering at 2004 and working in the era of IT for last 14+ years dedicatedly.
I am a believer of, “He who aims at the sky, shoot higher much than he who aims at a tree“.

Architecture Coding
The Rule of Three
June 25, 2026
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The Rule of Three
The Rule of Three: Why Great Software Engineers Don’t Abstract Too Early Software engineering is full of principles that promise cleaner, more maintainable code. Among them, one simple guideline has saved countless developers from over-engineering their projects: The Rule of Three At first glance, it may seem to encourage writing duplicate code. In reality, it […]
AI
17 AI System Design Concepts Every AI Engineer Should Master in 2026
June 7, 2026
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17 AI System Design Concepts Every AI Engineer Should Master in 2026
Artificial Intelligence has rapidly evolved beyond simple chatbots. Modern AI applications now combine large language models, retrieval systems, memory architectures, vector databases, tool calling, agent workflows, observability, and safety guardrails to deliver production-ready experiences. Whether you’re building an AI assistant, a RAG-powered knowledge base, a voice agent, a multi-agent system, or preparing for AI System […]
Vibe Coding
Ralph Wiggum Technique
April 12, 2026
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Ralph Wiggum Technique
The Ralph Wiggum Technique? The Ralph Wiggum Technique is not a real person and not a formal engineering method. It is an informal, community-style idea used by developers working with AI coding tools like Claude. Where the name comes from The name is inspired by Ralph Wiggum, the fictional character from The Simpsons, who is […]
php
My Code is My Future: How I Keep My PHP Clean and Powerful
April 4, 2026
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In life, we often hear the phrase: “Don’t judge a book by its cover.” But let’s be honest—people still do. The same applies in software development. You may have brilliant logic, powerful algorithms, and deep technical knowledge…But if your code is messy, inconsistent, or hard to read—people will judge you by it. And rightly so. […]
AWS
5 Essential AWS Architecture Patterns Every Cloud Engineer Should Know
February 3, 2026
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Cloud architecture design is one of the most important skills for modern developers, DevOps engineers, and solution architects. AWS provides multiple architecture patterns that help organizations build scalable, reliable, and cost-efficient applications. In this article, we will explore five widely used AWS architecture patterns that every cloud engineer should understand. 🧱 1. Three-Tier Architecture Three-tier […]
AWS AWS Cloud Machine Learning
When its Amazon & When its AWS
November 20, 2025
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If you’re preparing for AWS certifications or working with cloud services, you’ve probably noticed that some services start with Amazon while others start with AWS. Here’s the simple rule: ✅ Services that start with “Amazon” These are higher-level, customer-facing or application-level cloud services. Examples: Amazon EC2 Amazon S3 Amazon RDS Amazon DynamoDB Amazon CloudFront Amazon […]
AWS Machine Learning
Machine Learning Best Practices on AWS
November 20, 2025
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When developing machine learning models in the cloud, optimizing costs is a crucial aspect to consider throughout the entire ML lifecycle. The following are some best practices to follow in each phase: Phase -1: Data preparation phase Best practices for the data preparation phase include: Using cost-effective storage options like Amazon S3 for storing raw […]
TensorFlow
TesnsorFlow – Self Learning Course
October 3, 2025
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TensorFlow Course – Building and Evaluating Medical AI Models Source Code: https://colab.research.google.com/drive/1klBxr93NYXrLFOVMXhm0RbVm5PIjfXQn
NestJS
NestJS – Self Learning
October 3, 2025
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NestJs Course for Beginners – Create a REST API Source Code: https://github.com/vladwulf/nestjs-api-tutorial Thanks to: FreeCodeCamp.org
AWS
AWS Well-Architected Framework — 6 Pillars
August 14, 2025
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Pillar Focus Key Goals 1. Operational Excellence Run and monitor systems, and continuously improve processes and procedures. Enable effective operations, learn from failures, automate changes, and evolve procedures. 2. Security Protect data, systems, and assets while delivering business value. Implement strong identity management, enable traceability, protect data in transit/at rest, and prepare for incidents. 3. […]
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