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Ranking Backlog and Planning Sprints

Ranking Backlog and Planning Sprints

At Zaleos, we are Agile practitioners and we've used both Scrum and Kanban as management methodologies. Today we actively use Scrum, but we're not an Agile purist shop: we use the methodology to suit our team's specific needs, allowing us to derive maximum benefits from it - and not the

Exploring the Power of the SIP Protocol in VoIP Communications

Emergency Services

Exploring the Power of the SIP Protocol in VoIP Communications

One technology that has revolutionized the way we communicate is Voice over Internet Protocol (VoIP). This technology allows us to make phone calls over the Internet, eliminating the need for traditional phone lines. Behind the scenes, a protocol called Session Initiation Protocol (SIP) facilitates these interactions. At the heart of

Photo by Sigmund on Unsplash

The Importance of Technical Documentation

One of the most relevant factors in the self-development of humanity is the discovery of writing. The information learned is passed on from generation to generation through writing. Aware of this, Zaleos demonstrates the same precision as when developing its software while creating its documents. Why is technical documentation key?

Remote C/C++ compilation using Ccache & Distcc

Remote C/C++ compilation using Ccache & Distcc

Here at Zaleos, we are in favor of testing everything in our development process. In one of our larger projects, we are using C/C++, and we have been adding more tools to our CI pipeline to test more and more aspects of the code. We have unit tests, memory

Using a camera as a game controller

Using a camera as a game controller

There are two different worlds on the web. The first one is the world of browser games, which are usually built with HTML and JavaScript. They are somewhat popular and very accessible because you don’t need to download and install anything, and requirements for hardware are usually low. The

Software Engineer growth & development at Zaleos

Software Engineer growth & development at Zaleos

Zaleos' professional skills development strategy

Desired Performance skills of a Zaleos' Engineer

Desired Performance skills of a Zaleos' Engineer

Skills descriptions for Software Engineer growth & development at Zaleos

Ceedling enhancements: aborting test run if uncovered files are detected

Ceedling enhancements: aborting test run if uncovered files are detected

Recently we've adopted Ceedling as our test automation framework for C. Ever since, we've been working on tailoring it for our needs. Below you will find details of the latest feature that we've added to it (pending PR merge). The problem One thing we noticed when using Ceedling was that

Code linting with Flake8

Code linting with Flake8

In this post we are going to explore how do we lint our python code with Flake8.

Reactive programming for Real-Time Applications

Reactive programming for Real-Time Applications

The main idea of event-based programming is the management of the application execution flow on the events occurred around it that can affect its behavior, such as user actions (mouse click, pressing a key, etc.) or messages from other programs, including the operating system. These applications detect the events and

Unit-testing C code with Ceedling and CMock

Unit-testing C code with Ceedling and CMock

At Zaleos, one of our projects consists of an ESRP, which has been implemented as a module for the Kamailio SIP Router (https://www.kamailio.org/). All of our code for this project is written in C, and comes in at around 27k lines of code. > ESRP - Emergency Service

Automating virtual images with Hashicorp Packer

Automating virtual images with Hashicorp Packer

With continuous increase of PC performance capacity and expansion of an army of cloud platforms, Virtual Machines (VMs) become less of a luxury associated with having a large server capable of running VMs and more of a day-to-day utility aimed at helping developers across all industry spectrum. But with the

Creating a C++ based module in Kamailio

Creating a C++ based module in Kamailio

At Zaleos we have a strong background on Real Time protocols such as SIP or WebRTC. One of the Open Source products that we use most is called Kamailio [http://kamailio.org], which is an Open Source SIP Server that is able to handle thousands of VoIP calls [https://en.

Importance of communication in small companies

Importance of communication in small companies

Probably Communication is not one of the most desired topics that our readers would like to talk about and it’s somehow comprehensible due to the fact that: * This concept is abstract. * Most of the articles that can be found put emphasis only on “how” to perform it but do

How to generate relevant and up-to-date requirements: Lean Design

How to generate relevant and up-to-date requirements: Lean Design

In the previous article “Estimating Product Backlog Items (PBIs): Before or after Prioritizing?“ [http://www.zaleos.net/2018/01/30/BacklogEstimation] we talked about the challenges faced when running Estimation and Prioritization phases at Product Backlog level but we didn’t talk about the creation of Product Backlog Items (PBIs)

Automated Testing at Zaleos

Automated Testing at Zaleos

Automated testing has been increasing significantly among developers over the past years, especially with the introduction of Agile methodologies [https://en.wikipedia.org/wiki/Agile_software_development] and Continuous Integration [https://en.wikipedia.org/wiki/Continuous_integration] practices. Some people could think that it’s a hype, that is doing

Estimating Product Backlog Items (PBIs): Before or after Prioritizing?

Estimating Product Backlog Items (PBIs): Before or after Prioritizing?

Just reading the title, probably the first question that comes to your mind is: Why the first post those guys are writing, related to Product/Project Management subject, tackles directly this topic? :) The reason why we are not trying to explain “everything” about Product/Project Management (PM) processes using a

ECRF in Next Generation Emergency Services

Emergency Services

ECRF in Next Generation Emergency Services

The purpose of this post is to teach the basics regarding the systems, tools and services involved in the next generation emergency services regarding Geospatial Information Systems (GIS [http://en.wikipedia.org/wiki/Geographic_information_system]).NENA [http://www.nena.org/] elaborated and published a document called i3 [https://c.

SIP Real Time tools

SIP Real Time tools

As a company developing VoIP software, we need a solid developing and testing SIP [https://www.ietf.org/rfc/rfc3261.txt] ecosystem. SIP (Session Initiation Protocol) is a signaling protocol used for initiating, maintaining, modifying and terminating real-time sessions that involve video, voice, messaging and other communications applications and services

Centralized and reliable SSH client configuration

Centralized and reliable SSH client configuration

SSH'ing [https://en.wikipedia.org/wiki/Secure_Shell] into several VMs in a daily basics can be challenging and error-prone. In most cases you have to remember a bunch of different options: ips/domains, users, ports, ciphers… It’s hard to be updated when servers are added/removed and the