Introduction Most of the time, caching solutions like Memcached, Redis, Guava, etc. are used to increase data retrieval performance. This is achieved by storing some of the data in the cache layer and thus reducing the need to access the underlying slower data-storage layer. But there is another usage pattern of…

I recently worked on a feature for configuring tenant-specific custom subdomains in our product. In this article, I am sharing some of the designs our team iterated on, and their pros and cons. What are tenant-specific subdomains? Tenant-Specific Subdomains (a.k.a. custom subdomains) are a common feature provided in a multi-tenant SAAS solution, allowing each…

In most organizations, a common pattern of using AWS is to have multiple accounts for production, staging, and development. In such a setup, it is inevitable to lose track of various experimental AWS resources instantiated by your developers. Eventually, you are billed for these resources; even though this could have…

This article was originally posted on LinkedIn. I am a second-year graduate student in the Computer Science department at the University of Wisconsin-Madison. Like many of you, upon arriving in the US, adjusting to the new culture, focusing on my studies, and a parallel hunt for an internship turned out…

I spent my summer 2019 as a Backend Software Engineering Intern at Sumo Logic HQ in Redwood City; and in this post, I am sharing my internship experience.

Introduction The article starts off with a real-life problem statement and attempts to solve it using concepts similar to that of JWT. This is followed by an in-depth analysis of JWT, discussion of its various use-cases, and eventually some of its vulnerabilities. Problem Statement (kinda real-life) Alice, Bob, and Chuck are three friends. Alice writes…

I spent more than 24 hours to debug why an update of the encryption key is not working for my secret in AWS Secrets Manager. The final conclusion is just a one-liner, and hence if the read time makes you TLDR, you can jump to the conclusion directly. :) Quick Intro to AWS Secrets Manager AWS…

What is DoS? Any system/server, service or network has a limited set of resources to serve any process or request. In other words, resources are not infinite. Denial-of-service (DoS) is a type of malicious attack which tries to exhaust the system of all its available resources. And to do so, it bombards the…

Visa interviews are all about confidence and preparation, and here’s a step by step guide to your F1 Visa Interview. If you want to know about the Biometrics process, click here. To read my Visa interview experience, click here. If you are just looking for the sample Visa questions, click…