---
title: "Harshwardhan Choudhary (@easyharshmods) | Hashnode"
description: "Cloud & DevOps Engineer crafting scalable serverless solutions. Read the latest articles by Harshwardhan Choudhary on Hashnode."
url: "https://hashnode.com/@easyharshmods"
---

@easyharshmods

# Harshwardhan Choudhary

@easyharshmods · Netherlands · Joined September 2023

Cloud & DevOps Engineer crafting scalable serverless solutions

### [The AWS Bill Surprise: How I Built Ratefence CLI to Stop Forgotten Resources](https://easyharshmods.hashnode.dev/the-aws-bill-surprise-ratefence-cli?utm_source=hashnode&utm_medium=feed)

One simple terminal command to scan your AWS account, spot orphaned resources, and see estimated monthly costs without credentials ever leaving your machine.

8 min read · [easyharshmods.hashnode.dev](https://easyharshmods.hashnode.dev/the-aws-bill-surprise-ratefence-cli?utm_source=hashnode&utm_medium=feed)

[Aug 10](https://hashnode.com/posts/the-aws-bill-surprise-ratefence-cli/6a7a18051b76470c5895c470)

### [The right way to choose between REST, GraphQL, and gRPC on AWS](https://easyharshmods.hashnode.dev/rest-graphql-grpc-aws?utm_source=hashnode&utm_medium=feed)

A working AWS reference deploying REST, GraphQL, and gRPC each in the right architectural layer. Decision rule + four live demos inside.

20 min read · [easyharshmods.hashnode.dev](https://easyharshmods.hashnode.dev/rest-graphql-grpc-aws?utm_source=hashnode&utm_medium=feed)

[May 12](https://hashnode.com/posts/rest-graphql-grpc-aws/6a02f8a0937b84f779571e3a)

### [RAG in Practice: Building a Citation-Grounded Search System with pgvector and Amazon Bedrock](https://easyharshmods.hashnode.dev/rag-in-practice-building-a-citation-grounded-search-system-with-pgvector-and-amazon-bedrock?utm_source=hashnode&utm_medium=feed)

Build a citation-grounded RAG pipeline using pgvector on Aurora Serverless v2, Amazon Bedrock, and Streamlit. Includes a RAG ON vs OFF demo.

14 min read · [easyharshmods.hashnode.dev](https://easyharshmods.hashnode.dev/rag-in-practice-building-a-citation-grounded-search-system-with-pgvector-and-amazon-bedrock?utm_source=hashnode&utm_medium=feed)

[Apr 7](https://hashnode.com/posts/rag-in-practice-building-a-citation-grounded-search-system-with-pgvector-and-amazon-bedrock/69d45a5d5d075878b5cdf411)

### [I kept hearing LangChain everywhere. Here's what I found — and what I built.](https://easyharshmods.hashnode.dev/i-kept-hearing-langchain-everywhere-here-s-what-i-found-and-what-i-built?utm_source=hashnode&utm_medium=feed)

I kept hearing LangChain everywhere. I dug in, learned all four tools, and built FinOps Sentinel — a real AWS multi-agent cost analysis system.

16 min read · [easyharshmods.hashnode.dev](https://easyharshmods.hashnode.dev/i-kept-hearing-langchain-everywhere-here-s-what-i-found-and-what-i-built?utm_source=hashnode&utm_medium=feed)

[Apr 2](https://hashnode.com/posts/i-kept-hearing-langchain-everywhere-here-s-what-i-found-and-what-i-built/69ce38272d4d5bd0f0e4827a)

### [The Hub-and-Spoke Pattern for Multi-Environment Kubernetes: How to Scale from 3 to 30 Environments in Minutes](https://easyharshmods.hashnode.dev/the-hub-and-spoke-pattern-for-multi-environment-kubernetes-how-to-scale-from-3-to-30-environments-in-minutes?utm_source=hashnode&utm_medium=feed)

Think of a pizza. When you cut it into slices, each slice is an exact replica of the whole—same crust, same toppings, same quality. You can cut 4 slices for a small group, 8 for a party, or 12 for a c

22 min read · [easyharshmods.hashnode.dev](https://easyharshmods.hashnode.dev/the-hub-and-spoke-pattern-for-multi-environment-kubernetes-how-to-scale-from-3-to-30-environments-in-minutes?utm_source=hashnode&utm_medium=feed)

[Mar 26](https://hashnode.com/posts/the-hub-and-spoke-pattern-for-multi-environment-kubernetes-how-to-scale-from-3-to-30-environments-in-minutes/69c583ad10e664c5da1be76a)