Blogs

Other Parts of This Series: Part 16: Software Design Patterns and Principles - Part 16 (Template Method Design Pattern) Object Oriented Design (Photo Credit: Coding Ninjas) What is OOD (Object-Oriented Design)? Object-Oriented Design (OOD) is the process of designing a system by breaking it down into objects (classes) that interact with each other to solve a problem. In Simple Terms, OOD is the modeling of real-world problems using objects, behaviors, and relationships. ...

STEER Leadership Model (Photo Credit: Dallas Innovates) On September 14-15, 2025, I participated in a 2-day-long workshop titled “bKash Leadership Excellence Program: S.T.E.E.R. to the Future” with Quazi M. Ahmed, organized by b-academy, and the learning partner was Quazi Consultants. I would love to share my learning and takeaways from this workshop. Please note: not all the following things were discussed in the workshop as it was presented. I am trying to present based on my own learnings and understanding. So let’s start… ...

How to Win Friends and Influence People Book (Photo Credit: uniathena) Book Introduction “How to Win Friends and Influence People” by Dale Carnegie is a timeless self-help classic that teaches practical techniques for improving communication, building relationships, and influencing others positively—both in personal and professional life. Instead of theory, it focuses on human psychology and real-life social behavior. About Author(s) Dale Carnegie (1888–1955) was an American writer, lecturer, and developer of self-improvement courses. He was a pioneer in personal development & communication skills and was focused on public speaking, salesmanship, and interpersonal skills. He founded Dale Carnegie Training, still active globally. His teachings are based on practical observation of human behavior, not only academic theory. He also wrote How to Stop Worrying and Start Living (1948). ...

Other Parts of This Series: Part 25: DevOps - Step By Step Learning : Part 25 (Docker Networking With Help Of Linux Namespace) DevOps Build Tools (Photo Credit: Unsplash) Story: Rasel observed some of his junior software developer colleagues limited to an IDE. This means they were skilled at writing code and running it with a single click of the IDE’s run button. But they didn’t know how the code was built on the server side. They should know beyond the IDE, as the server has no IDE or run buttons at all. So Rasel decided to assist them in understanding the build tools, how they work, and their importance. ...

Other Parts of This Series: Part 24: DevOps - Step By Step Learning : Part 24 (Docker Compose & Docker Swarm Hands On) Part 26: DevOps - Step By Step Learning : Part 26 (Build Tools and Its Necessity) DevOps Docker Networking (Photo Credit: Unsplash) Story: Rasel learned the fundamentals of native Docker, Docker Compose, and Docker Swarm. And by doing so, he solved the consistency and ‘it works on my machine’ issues in his daily development life. ...

Other Parts of This Series: Part 23: DevOps - Step By Step Learning : Part 23 (Docker Hands On) Part 25: DevOps - Step By Step Learning : Part 25 (Docker Networking With Help Of Linux Namespace) DevOps Docker Compose & Docker Swarm (Photo Credit: Unsplash) Story: Pure Docker is useful for running a simple standalone application or service. But real-world projects are not always as straightforward and simple as they appear. During development, we constantly require multiple dependencies or services to function, such as a database, cache, message broker, and so on. Rasel realized we needed something to solve this problem. Rasel was looking for a solution that was capable of handling multiple container bootstrapping. And guess what? Rasel discovered that Docker Compose is the solution. That’s why, Rasel decided to learn Docker Compose and Docker Swarm in detail. ...

Other Parts of This Series: Part 22: DevOps - Step By Step Learning : Part 22 (Introduction of Containerization Tool Docker) Part 24: DevOps - Step By Step Learning : Part 24 (Docker Compose & Docker Swarm Hands On) DevOps Docker Containerization (Photo Credit: Unsplash) Story: Understanding what containerization is, why it is necessary, and how it works is critical before delving into Docker or any other container tools (like: podman, containerd etc.). Rasel wanted to go hands-on with Docker after understanding these concepts. So, as planned, Rasel begins with the Docker architecture and basic commands that needs for his day-to-day development. And gradually move to the advanced concepts of Docker. ...

Other Parts of This Series: Part 20: DevOps - Step By Step Learning : Part 20 (Hands On Networking Commands, Practically Connect The Theory) Part 23: DevOps - Step By Step Learning : Part 23 (Docker Hands On) DevOps Docker Containerization (Photo Credit: Unsplash) Story: Rasel felt more comfortable and confident after learning the fundamentals. Now he thought it was time to start learning DevOps tools. But where should he start? There are numerous tools that are commonly used in DevOps practice. Then he made the decision to start with Docker. Because as a software engineer he faced numerous challenges when installing, running, and building software and its dependencies. And the well-known issue “It works on my machine” always arises. As far as he knew, Docker, or container technology, solved this type of problem. That is why he decided to learn containerization first. ...

Other Parts of This Series: Part 19: DevOps - Step By Step Learning : Part 19 (TCP and UDP Are The Backbone of Transport Layer) Part 22: DevOps - Step By Step Learning : Part 22 (Introduction of Containerization Tool Docker) DevOps Networking Practical (Photo Credit: Unsplash) Story: Rasel now wanted to explore and practice the learned theoretical data communication and networking concepts hands-on. He wanted to practically capture as much information as possible about host-to-host packet transfer of each layer of the OSI model using Linux commands. From the high level, Rasel started from the below point: ...

Other Parts of This Series: Part 18: DevOps - Step By Step Learning : Part 18 (NAT, PAT For Inner Private with Outer Public Network Handshaking) Part 20: DevOps - Step By Step Learning : Part 20 (Hands On Networking Commands, Practically Connect The Theory) DevOps Networking TCP & UDP (Photo Credit: Unsplash) Story: Till now Rasel explored how data move host to host over the OSI or TCP/IP model by utilizing all the parties/parts like networking devices and protocols. He understood how source and destination IPs resolved in the application layer using DHCP and DNS, respectively. Also, he tried to realize how the logical address, like IP, makes a connection with the physical address, like the MAC address, using ARP the bridge between the data link and network layers. Besides all of these, Rasel explored how do using mechanisms like NAT/PAT overcome IPv4 limitations and private-public IP mapping in the transport and network layers. All the points were served via MAC address table, routing table, ARP table/cache, NAT mapping table, etc. ...