Technical writing, engineering insights, and reflections from Abishek Neupane. Backend systems, DevOps, databases, and the Arch Linux life.https://www.abishekn.com.np/envirtualabishek@gmail.com (Abishek Neupane)virtualabishek@gmail.com (Abishek Neupane)© 2026 Abishek Neupanehttps://www.abishekn.com.np/blogs/esewa-vs-khalti-secure-payment-flow-nepal/https://www.abishekn.com.np/blogs/esewa-vs-khalti-secure-payment-flow-nepal/ Explore the mostly used online payment gateways of Nepal: Esewa and Khalti and learned that anyone can change the payment amount in the browser. If we rely on that number, someone can buy a Rs 1000 item for Rs 1. Here is how I keep things honest with eSewa and Khalti.Tue, 06 Jan 2026 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/esewa-vs-khalti-secure-payment-flow-nepal.svg" alt="eSewa vs Khalti: how I keep Nepali payments honest" /><p> Explore the mostly used online payment gateways of Nepal: Esewa and Khalti and learned that anyone can change the payment amount in the browser. If we rely on that number, someone can buy a Rs 1000 item for Rs 1. Here is how I keep things honest with eSewa and Khalti.</p>technicalsecuritybackendpaymentsvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/how-google-use-spanner-for-distributed-database-management/https://www.abishekn.com.np/blogs/how-google-use-spanner-for-distributed-database-management/I explored the paper - Spanner: Google’s Globally Distributed Database. This blog contains about the spanner in easier way to those who wants to learn about itMon, 29 Dec 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/how-google-use-spanner-for-distributed-database-management.svg" alt="Spanner - Google solution for distributed database in easier" /><p>I explored the paper - Spanner: Google’s Globally Distributed Database. This blog contains about the spanner in easier way to those who wants to learn about it</p>technicaldatabasedistrubuted-databasevirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/jwt-access-token-refresh-token-in-nestjs-ecommerce/https://www.abishekn.com.np/blogs/jwt-access-token-refresh-token-in-nestjs-ecommerce/A practical guide to implementing secure JWT-based authentication with access tokens and refresh tokens in a NestJS e-commerce project. Covers token generation, validation, refresh flow, security best practices, and real-world application in an online store.Mon, 29 Dec 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/jwt-access-token-refresh-token-in-nestjs-ecommerce.svg" alt="Secure Authentication in NestJS E-Commerce: JWT, Access Tokens, and Refresh Tokens Explained" /><p>A practical guide to implementing secure JWT-based authentication with access tokens and refresh tokens in a NestJS e-commerce project. Covers token generation, validation, refresh flow, security best practices, and real-world application in an online store.</p>technicalnestjsjavascriptauthenticationjwtsecurityecommercebackendvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/postgresql-transactions-locking/https://www.abishekn.com.np/blogs/postgresql-transactions-locking/A deep dive into PostgreSQL transactions, error handling, savepoints, transactional DDLs, and locking with MVCC.Thu, 14 Aug 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/postgresql-transactions-locking.svg" alt="Understanding Transactions and Locking in PostgreSQL" /><p>A deep dive into PostgreSQL transactions, error handling, savepoints, transactional DDLs, and locking with MVCC.</p>technicalpostgresqldatabasevirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/database-comparision/https://www.abishekn.com.np/blogs/database-comparision/I explored different database and compared with each other. I also tested PostgreSQL for its size and time for the 100000 tuplesWed, 13 Aug 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/database-comparision.svg" alt="Database Comparision between PostgreSQL, MySQL, Oracle, MS SQL Server" /><p>I explored different database and compared with each other. I also tested PostgreSQL for its size and time for the 100000 tuples</p>technicallinuxdevelopmentvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/village-realities-four-day-revelation/https://www.abishekn.com.np/blogs/village-realities-four-day-revelation/Reflections from a four-day tour to rural Nepal - discovering the challenges and wisdom of village life through conversations with locals.Sun, 06 Jul 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/village-realities-four-day-revelation.svg" alt="Village Realities: A Four-Day Revelation" /><p>Reflections from a four-day tour to rural Nepal - discovering the challenges and wisdom of village life through conversations with locals.</p>non-technicallifetravelnepalvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/breaking-down-the-problem/https://www.abishekn.com.np/blogs/breaking-down-the-problem/A raw, honest dive into building a PHP portal from scratch, grappling with a new tech stack, and learning to embrace the mess of coding.Sun, 27 Apr 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/breaking-down-the-problem.svg" alt="From Chaos to Clarity" /><p>A raw, honest dive into building a PHP portal from scratch, grappling with a new tech stack, and learning to embrace the mess of coding.</p>technicaldevelopmentvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/everyday-reflections/https://www.abishekn.com.np/blogs/everyday-reflections/Personal reflections on everyday struggles in Nepal from the lens of a non-political observer.Tue, 08 Apr 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/everyday-reflections.svg" alt="Everyday Reflections: Life's Unexpected Moments" /><p>Personal reflections on everyday struggles in Nepal from the lens of a non-political observer.</p>betryednon-technicalvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/linux-and-wsl-journeys/https://www.abishekn.com.np/blogs/linux-and-wsl-journeys/Exploring Linux, distro-hopping, and how WSL changed my development workflow.Wed, 02 Apr 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/linux-and-wsl-journeys.svg" alt="My Linux Journey and the Power of WSL" /><p>Exploring Linux, distro-hopping, and how WSL changed my development workflow.</p>technicallinuxwslwindowsdevelopmentvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/too-much-philosophy/https://www.abishekn.com.np/blogs/too-much-philosophy/A reflection on the balance between thinking and truly living.Wed, 02 Apr 2025 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/too-much-philosophy.svg" alt="Too Much Philosophy, Not Enough Presence" /><p>A reflection on the balance between thinking and truly living.</p>philosophynon-technicalvirtualabishek@gmail.com (Abishek Neupane)https://www.abishekn.com.np/blogs/first-blog/https://www.abishekn.com.np/blogs/first-blog/A short hello-world post that kicked off the blog journey.Wed, 03 Apr 2024 00:00:00 GMT<img src="https://www.abishekn.com.np//og/blog/first-blog.svg" alt="Hello World" /><p>A short hello-world post that kicked off the blog journey.</p>technicalvirtualabishek@gmail.com (Abishek Neupane)