Where I write about the things I find interesting on Esteban Sastre

While learning about the relationship between the Cap Rate and NOI, there’s a particular reasoning that was itching me because I could not fully understand it.

I realize I have previously written about cap rate and cash-on-cash assuming prior knowledge of the basic building block of both, the Net Operating Income.

I already mentioned Cap Rate in this other post as a comparative metric for Cash-on-Cash.

I’ve been wanting to dive deep into better understanding the world of real estate investing taking a more analytical approach.

There are many variations of this sentence I hear when talking with people about getting a mortage: At first you’re paying mostly interest but over time you pay less interest and more goes to the house.

What is it?

What is it?

What is it?

What is it?

What is it?

What is it The First Chicago valuation method differs from other methods I’ve listed up until now, like Scorecard, Berkus or Venture Capital, in the fact that not only qualitative analysis come into play, but additional financial projection is needed to i…

What is it?

This past Saturday 17th September I had the chance of assisting to the Nosday 2022 edition in Santiago de Compostela, Galicia, Spain.

What is it?

What is it?

What is it?

What is it?

What is it The scorecard valuation method is a technique formulated by Bill Payne, a US angel investor in 2001 to approximate the valuation of pre-revenue startups for possible investment rounds.

With Twilio Conversations SDK 2.0 release there is a new way of creating the client and setting up the event handlers.

Introduction Going from being an employee my whole professional career to cofounding TheGoodPsy in 2020 meant transitioning from focusing solely on the responsibilities directly pegged to my software engineering role to a whole slew of business concepts I…

For convenience, Psychologists in TheGoodPsy are able to connect to their Google Calendar to see their events along with the appointments local to the platform in order to prevent clashes between the two.

Recently in TheGoodPsy we experienced an uptick in the number of signups & concurrent users.

There are multiple places where we load data asynchronously in TheGoodPsy, so we use the ReactLoading package to show a spinner while the data is being downloaded and processed in the frontend.

Over the course of TheGoodPsy’s life, there have been countless changes.

A basic user flow in TheGoodPsy is to allow patients to book appointments directly from the chat.

Choose the hacky-unelegant-put-together solution before the good, well-thought one.

It becomes harder to keep your technical skills up to date.

One can’t expect people to have the same level of investment as you have in your own startup.

Normally I would be working on a non-tech related task, such as writing an entry in Notion for a new feature for a developer to implement, or dealing with the back & forth of expectations when hiring a freelancer for a given task, and it strikes me: “I co…

As a developer, your work is structured, at least most of the time.

Another year another corny-ass new year’s resolutions post!

For React applications I often use Redux as my state management library of choice because of its simplicity, stability, added plugins, and predictability.

Introduction Recently this week I was discussing with a friend whether Wordpress could be a viable choice for a web application over a custom solution in order to have a working MVP as fast as possible.

Dubbel?

Such a symbol of belgian tradition must not remain unexplained.

For the last 8 months I have been working at Beer Planet and I took over the task of improving the shop’s online presence in Instagram and Facebook.

After reading Jezen Thomas’ cool blog post about Showing Weather in Tmux, I tried it in my computer and loved the result after minor tweaks: From that moment it also occurred to me that next to the weather, date and time I would love to have a greeting se…

Introduction After being quite disconnected from the technology world for months and pretty much limiting my interactions to my working schedule, I decided to go back into setting up my personal workstation with the minimal memory footprint and using as l…

It is the second time at work that I spent some minutes wondering why I was not properly receiving POST arguments in a view when testing it from django.

Introduction Nowadays is not uncommon that web applications include full text search features.

Introduction Besides the day-by-day work, I like to always have an ongoing side project to keep my skills sharp.

Introduction I never quite got what was the requestAnimationFrame function I kept seeing while reading web articles since I never really dove deep in graphics in the browser.

Every time a new year passes by I feel a mix of two reactions: on one side, my first impression is always of a slight disappointment, as if I had not accomplished anything worth mentioning or hadn’t made much more of a change compared to how I was when the

Introduction As part of the process of working in node.js applications, developers usually use additional libraries and frameworks to ease and speed their development time, and more than often the number of libraries they rely upon is quite high.

Problem I am currently working on an issue in a very old Ember.js application (version 1.13.0 of the ember-cli).

Overview I’ve had the intention of writing an article about PGP for a long time, but every time I started reading about the topic I almost immediately brushed the idea off.

Problem It’s been a while since I don’t write any posts, so I thought that even though the idea might be initially quite silly, it will help me to kickoff again the habit by writing about a small problem I encountered the other day.

How do you handle exceptions in express.js?

While working in the functionality for getting a docker-compose path from the cursor position, I realized at some point I was writing constantly code like this: let first_result = func_call1(val); let second_result = func_call2(first_result); let third_re…

In a previous article I explained our approach at work to deploy an Ember.js application in an nginx server running on docker.