Partly boring tech stack that powers my SaaS project. I built this MVP in less than 1 month with $0 monthly cost — This article is inspired by The Tech Stack of a One-Man SaaS by Anthony Simon of Panelbear. In December 2021, I launched Asthma Journey, an app for people with asthma to record and analyze their asthma symptoms so that they can get better diagnoses and treatments. Two months later, I…

Refreshing JWT Token and recommended settings for production environment — You can find the first part of this tutorial here. In the first part of the tutorial, we have built a functioning frontend and backend app that allows users to authenticate via Google login. Refreshing a JWT Token We are not done yet! Even though our app can authenticate a new user correctly, our…

Build end-to-end Social Login screen in Nuxt & Django — Overview Over the past few weeks, I’ve been working on a side project. One of the requirements is to enable the user to sign in to the application using Google social login. The web app is built using Nuxt for the frontend and Django REST Framework for the backend. Initially, building…

Safely scale out the application servers while maintaining a minimal number of database connections — What is pgbouncer pgbouncer is connection pooling middleware software between the application servers & Postgres DB instance. The purpose of connection pooling is to make it efficient for applications to connect to Postgres instances. How does pgbouncer do this? By reusing the connections to the database.

Day job Early 2021, I was working with Django & Kubernetes a lot. For the record, I’m working with a CDN company on an Over-the-top (OTT) video streaming product. I remember hacking iptables to add rate limiting rules in Kubernetes nodes. It was fun! One of the projects I was involved in…

Using an open-source OLAP database to run analytic queries on your data in sub-second — This post is originally published in my personal blog. Previously, the Online analytical processing (OLAP) databases were only available as proprietary software offerings like Greenplum, Vertica, Teradata, Paraccel, etc. At that time, it’s very costly to deploy the OLAP databases, and only companies with huge budgets have access to them…

Build a reliable worker with graceful shutdown capability — This article is originally published here. What is a worker? A worker is a program that listens to the events in your system and performs actions in the background asynchronously. Asynchronous means the worker performs the action in the background outside the request-response cycle, so the user doesn’t have to wait for the execution…

It has caused a lot of frustrations among Malaysians to book their vaccine appointment — This story is originally published here. This article is inspired by Jonathan Lin’s post on the same topic and how Nike handles their Sneaker Drop sale. Background On 26th May 2021, the Malaysian government opens up vaccination slots to everyone in Kuala Lumpur and major cities in Malaysia. The registration form…