LaundryAlert - never forget your laundry again

A few months ago I was hanging my laundry after it stayed in the washing machine for half a day before I remembered I had forgotten to take it out....

Self signed SSL certificates on iOS

Recently I was working on a project and I needed to add an SSL certificate for the API service. Normally you would use Let’s Encrypt or some other certificate authority after deploying the service....

Javascript objects are tricky

I just spent four hours debugging a really weird issue… I’m gonna write it up here as a reminder for my future self, and maybe you’ll find it useful too....

Server-sent events or how ChatGPT typing animation works

I’m sure you’ve heard of ChatGPT, the fastest-growing user application in the history of the internet. Most probably you also played with it or even used it for work. This chatting model provides impressive and often mind-blowing responses to a wide range of questions....

Database locks, lost updates and idempotency

Web applications are often complex systems consisting of several parts such as UI (frontend), API (backend), database and often other 3rd party services that the application depends on. Designing the API service properly so it’s robust, secure, and works as expected goes without saying but sometimes there are other factors that should be considered and handled adequately....

Assuming IAM role and role chaining in AWS

Sometimes a user or an application needs to access resources they don’t normally have access to. This is where the AWS Security Token Service (STS) comes in handy. STS is an AWS service used to obtain temporary security credentials for IAM users or roles by using the AssumeRole action....

Running HTTPS on localhost

The majority of websites nowadays are already using HTTPS. Security is very important in today’s world of the internet where you can buy stuff online, check your bank account, communicate with people, or just enjoy watching a movie....

Keeping track of database changes and when it can be useful

My task was simple - we had a Postgres database and a data science team that needed to consume changes from the database to update their internal datasets. But how on earth would I do that?...

Why use multiple unsubscribe groups when sending emails

We all know how annoying all those emails that we receive from various websites might be, especially when we don’t expect them. So naturally, there should be an option to unsubscribe. However there are some things that you have to be careful about.

Travelling around Argentina

At the beginning of the year, my girlfriend and I spent four weeks on the roads of this beautiful country. This was our first time in South America and we were really amazed and got lots of experiences and memories, so I thought I would write down some notes of our adventure and maybe share some tips and tricks....