Kalvad (Page 2)

Apache Airflow on Clever Cloud

Apache Airflow on Clever Cloud

During a recent interaction on Twitter [https://twitter.com/mtparet/status/1476569459762548738] (in French, sorry), some people were misbehaving and we were shocked to see the same story as usual: people are using software without understanding it (or reading the doc)! I blame a lot all these "ready-made"

Haskell series part 9

Haskell series part 9

This is the ninth article of a series on the functional language Haskell for beginners

Write your own CRON with Elixir

Write your own CRON with Elixir

Elixir is rising in popularity and I think this is mostly due to the amazing Phoenix Framework. But for once, let's forget about WEB development and write a simple software: a complete CRON. If you are too lazy to read, you can directly check the code on Github

Haskell series part 8

Haskell series part 8

This is the eighth article of a series on the functional language Haskell for beginners

IPFS in-depth(Myths and Misunderstandings)

IPFS in-depth(Myths and Misunderstandings)

First of all, What is IPFS? The Interplanetary File System (IPFS) is a bundle of subprotocols and a project-driven by Protocol Labs, IPFS aims to improve the web’s efficiency and to make the web more decentralized and resilient. IPFS uses content-based addressing, where content is not addressed via a

IT hiring process

IT hiring process

An IT project's life is complex and split into many crucial steps. One of them is to hire your IT team, may it be one developer or a dozen of people with different roles and expertise. Though roles would require a different hiring process, you can gather a

Haskell series part 7

Haskell series part 7

This is the seventh article of a series on the functional language Haskell for beginners

Phoenix Liveview - From --no-html to html & liveview

Phoenix Liveview - From --no-html to html & liveview

If you have generated your Phoenix app thinking you would never have to render HTML but realized later on you need to, you have landed at the right place. This is not something easy to do since it requires carefully adding the right components at the right place. Please note

Sysadmin/DevOps/SRE people, we are on the way to a massive pauperization of our jobs!

Sysadmin/DevOps/SRE people, we are on the way to a massive pauperization of our jobs!

If you follow us on LinkedIn, you should have seen that we are hiring a lot of people these days, especially in one department that is not the most active on the hiring part: Kalvad's Infrastructure Team (KIT™). The KIT™ has currently 2 members with me as the

Haskell series part 6

Haskell series part 6

This is the sixth article of a series on the functional language Haskell for beginners

PM Golden Rule: Open questions!

project management

PM Golden Rule: Open questions!

The best way to start a project or to determine the cause of an issue? Asking questions, a lot, the more the better! But always keep in mind: there are no stupid questions but there are useless ones. Your client, like anybody else, has a limited time of attention for

#3 Pimp my Phoenix

#3 Pimp my Phoenix

Third article of a series about Phoenix and Elixir. This one will be focused on CSS framework implementation and simple custom form validation.

Security is a never-ending process, not a validation step!

Security is a never-ending process, not a validation step!

As you may know, if you are familiar with our blog, most people are considering us as IT's firefighters (and don't get me wrong, I'm not a big fan of middle-of-the-night phone calls). Usually, the main issue for middle-of-the-night calls is infrastructure, but from

Haskell series part 5

Haskell series part 5

This is the fifth article of a series on the functional language Haskell for beginners

Setup your own WebRTC system

Setup your own WebRTC system

If you are looking for a neat introduction to WebRTC and a tutorial on how to setup both the server and client side, look no further. We will go through all of this here. There is a lot to unpack so let's jump straight to the point. Disclaimer:

#2 Deploy your Phoenix application with Clever Cloud

#2 Deploy your Phoenix application with Clever Cloud

Second article of a series about Phoenix and Elixir. This one will be focused on automatic deployment with Clever Cloud.

Haskell series part 4

Haskell series part 4

This is the fourth article of a series on the functional language Haskell for beginners

How to handle a massive infrastructure problem

How to handle a massive infrastructure problem

Tonight is one of these nights. It's 04:30 a.m. and I receive an emergency call (less than 3 hours after going to bed) from this customer which is important to us. They are asking for help, as they have a major issue in their data center

#1 Handle authentication with Phoenix framework

#1 Handle authentication with Phoenix framework

First article of a series about Phoenix and Elixir. This one will be focused on authentication for both HTML and API usage.

Haskell series part 3

Haskell series part 3

This is the third article of a series on the functional language Haskell for beginners

Step up your Elixir game

Step up your Elixir game

As you may have notice from our previous articles, we write more and more Elixir code at Kalvad. It comes very handy when we need to build scalable systems and the amazing Phoenix LiveView framework allows us to create rich and real-time web-applications. Elixir is a pure functionnal programming language

Using Open source software is the only way to have a sustainable business

Using Open source software is the only way to have a sustainable business

I'm convinced for multiple years that open source is the future, however, after almost 10 years as a C-Level manager, my discourse changed a bit! Let's be clear, originally, my discourse was more political than rational. But I think it's time to write how

Haskell series part 2

Haskell series part 2

This is the second article of a series on the functional language Haskell for beginners

You are software engineers, so COMPILE YOUR SOFTWARE

You are software engineers, so COMPILE YOUR SOFTWARE

Few weeks ago, I did a conference about Kubernetes/Docker (in French, sorry, but the slides are here [https://www.beautiful.ai/player/-MToF5BZRnhHDSNdjfhX]), and I put inside a statement that some people, rightfully, were holding me accountable for: Docker images are slow because they are using old technologies! The

Code readability - How to stop rewriting your application every 4 years

Code readability - How to stop rewriting your application every 4 years

More than half of our clients come to us after a bad experience with an IT outsourcing company. And in this scenario, most of the time, we will simply maintain the existing application while we rewrite a new application from scratch. Because sadly, it's faster for us to