Zakaria Shahen

back-end developer

June 28th, 2025

[Project: Kubernetes]: Kubernetes Deployment for Spring Application
Project Link: GitHub

Deploying a Java application to a Kubernetes cluster by containerizing it

Establishing a K8S external service allows pods within the cluster to connect to the database outside the cluster.

Use ConfigMap, Secret, Deployment.

Use GitHub Action to create a Continuous Integration (CI) pipeline to build a docker image and push it to GitHub Packages Registry.
June 28th, 2025

[LinkedIn Learning]: Spring on Kubernetes: Deploying and Managing Cloud-Native Applications

Spring on Kubernetes: Deploying and Managing Cloud-Native Applications
Start: 20-06-2025
End: 21-06-2025
June 24th, 2025

[Project: Kubernetes Deployment]: K8s deployment to deploy Spring Application
Project Link: GitHub

Deploying a Java application to a Kubernetes cluster by containerizing it

Establishing a K8S external service allows pods within the cluster to connect to the database outside the cluster.

Use ConfigMap, Secret, Deployment.

Use GitHub Action to create a Continuous Integration (CI) pipeline to build a docker image and push it to GitHub Packages Registry.
June 16th, 2025

[LinkedIn Learning]: Advanced Kubernetes: 1 Core Concepts

Advanced Kubernetes: 1 Core Concepts
Start: 16-06-2025
End: 20-06-2025

[LinkedIn Learning]: Getting Started with Kubernetes Path

Learning Path: Getting Started with Kubernetes
Courses:
Course Name -> End day

Learning Kubernetes:                          26-01-2025
Kubernetes: Your First Project:               09-06-2025
Kubernetes: Essential Tools:                  09-06-2025
Kubernetes: Microservices:                    09-06-2025
Kubernetes: Cloud Native Ecosystem:           10-06-2025
Securing Containers and Kubernetes Ecosystem: 13-06-2025

May 10th, 2025

[kube.academy]: Interacting with Kubernetes + Introduction To Building Application Platforms with Kubernetes courses
Interacting with Kubernetes

Introduction To Building Application Platforms with Kubernetes

Start & End date: 10-05-2025
May 9th, 2025

[kube.academy]: Understanding Cloud Native - Learning Path

Start & End date: 9-05-2025
May 9th, 2025

[kube.academy]: Introduction to Building Cloud Native Applications - Learning Path

Start Day: 08-05-2025
End Day: 09-05-25
May 5th, 2025

[kube.academy]: Kubernetes Core Concepts - Learning Path

Start: 02-05-2025
End: 05-05-2025
May 5th, 2025

[Writing: kubernetes]: Writing k8s note to documented my learning journey.

- Documented my learning journey through writing.
- Gist: k8s_node.md
March 20th, 2025

[PR: GSoC - OpenRewrite & Kotlin Foundation] created first pull request in Google Summer of Code

Pull Request
I hope the PR will be great and marge it.
Why?
- Google summer of code is good start point in open source contribution
- It's help me to grow.

December 24th, 2024

[Book: Microservices in action] Ch1 ~ Ch12

Ch1: 24-12-2024
Ch2: 25-12-2024
Ch3: 26-12-2024
Ch4: 27-12-2024
Ch5: 28-12-2024
Ch6: 29-12-2024
Ch7: 30-12-2024
Ch8: 30-12-2024
Ch9: 01-01-2025
ch10~ch12: done

December 19th, 2024

[Reading: microservices.io]: Microservices Patterns

All links inside the next article

A pattern language for microservices

end time: 20-12-2024
December 15th, 2024

[Reading: refactoring.guru] (again-review) The all of the articles in the "Design Patterns" Content

End: 18-12-2024
December 3rd, 2024

[Project: back-end API]: Library Management API

Tech stack: Spring framework, Spring boot, Spring security, Spring date JDBC, MySQL, Test Container, Docker, git, MapStruct, Lombok
repository
November 27th, 2024

[Course: spring.academy]: Securing a REST API with OAuth 2.0

Course
November 19th, 2024

[Course: spring.academy]: Spring Boot

End day: 22-11-2024
Course
November 16th, 2024

[Course: spring.academy]: Spring Framework Essentials

End day: 18-11-2024
Course
October 1st, 2024

[Book Paperback: Effective Java]: Ch1~Ch11

offline.
May 3rd, 2024

[Course: AWS Skill Builder]: AWS Cloud Practitioner Essentials

Model 1~3: 3-5-2024
Model 4~5: 4-5-2024
Model 6~8: 5-5-2024
Model 9~11: 7-5-2024
aws_certified_cloud_practitioner_notes.md
Course
April 22nd, 2024

I got a promotion to Software Engineer II
April 9th, 2024

[Book: Pro Spring 6]: Ch3

end: 10-4-2024
April 6th, 2024

[Reading: baeldung] Java Service Provider Interface

https://www.baeldung.com/java-spi
April 5th, 2024

[Book: Pro Spring 6]: Ch1~Ch2

end: 06-04-2024
January 22nd, 2024

[Reading, Videos]: OPP review, Responsibility-Driven Design, Connascence, ..etc.
Connascence

ETE 2012 - Jim Weirich - Connascence Examined

https://connascence.io

Responsibility-Driven Design

Responsibility-Driven Design

https://www.wirfs-brock.com/Design.html

Rebecca Wirfs-Brock - What Drives Design?

OOP

4 Principles of Object-Oriented Programming

Leaky Abstraction

Dependency Injection & Inversion Explained | Node.js w/ TypeScript

Coupling, Cohesion & Connascence

Why Test-Driven Development?

Overview of Outside-In TDD

Maintain a Single Layer of Abstraction at a Time

Conway's Law

Stable Dependency Principle (SDP)

Class Invariant

Organizing App Logic with the Clean Architecture [with Examples]

Command Query Separation and HeisenBug

https://martinfowler.com/bliki/CommandQuerySeparation.html

https://khalilstemmler.com/articles/oop-design-principles/command-query-separation/

https://en.wikipedia.org/wiki/Command%E2%80%93query_separation

Minimal Interface

Humane Interface

Thin Interfaces, thick implementations

Anemic Domain Model

SOLID

SOLID Principles: The Software Developer's Framework to Robust & Maintainable Code [with Examples]

Better Software Design with Application Layer Use Cases | Enterprise Node.js + TypeScript

REST-first design is Imperative, DDD is Declarative [Comparison] - DDD w/ TypeScript

3 Categories of Hard Software Problems

Better Software Design with Application Layer Use Cases | Enterprise Node.js + TypeScript
November 14th, 2023

[Contribution] Report an issue in spring framework and submit PR to fix it, When using Oracle, JdbcClient.update(KeyHolder) does not work without explicit key column names

Issue: #31607
PR: PR31608
Release notes: v6.1.0
June 24th, 2023

[Course: educative]: A Practical Guide to Kubernetes

I'm going back to learn a new course🎉.
April 10th, 2023

[Book: API Design Pattern]: Ch1 to ch2

End: 11-4-2023
April 7th, 2023

[Course: educative]: Web app security path - 4 modules/courses

Start date: Null
Link
Modules/Courses
- Web Application Security: Understanding HTTP Security Headers
- Web Security and Access Management: JWT, OAuth 2, OpenId Connect
- Integrate Auth0 with Java Servlet Application
- Web Application Security for the Everyday Software Engineer
March 26th, 2023

[Reading: auth0 blog]: Critical vulnerabilities in JSON Web Token libraries

Critical vulnerabilities in JSON Web Token libraries
March 4th, 2023

[Book: Kotlin In Action] Ch10~Ch11, and Appendix

End 6-3-2023
February 22nd, 2023

[Book: Kotlin In Action] Ch1~Ch9

End: 1-3-2023
February 11th, 2023

[Reading: MDN Web HTTP] HTTP caching

content
January 24th, 2023

[Reading: programiz] Kotlin Tutorial

content
Note: The start date might not be exact.
January 22nd, 2023

[Coruse: pluralsight] kotlin-fundamentals
January 22nd, 2023

began working as a back-end developer 🎉 at Banque Misr

I got first job as back-end developer 🎉🎉🎉
after years of working for my dream, I'm a back-end developer, so, yeah🎉🎉✌️
Tech Stack: Java, Kotlin/JVM, Spring, ..etc.
January 4th, 2023

[Course: pluralsight]: Design Patterns in Java: behavioral

Content
End: 9-1-2022
January 4th, 2023

[Reading: refactoring.guru] The all of the articles in the "behavioral Design Patterns" section Content

End: 9-1-2022
January 3rd, 2023

[Course: oreilly] Advanced Java Development - Part 1~5

Content
end: 3-1-2023
January 1st, 2023

[Book: Spring Security In Action] Ch12
December 25th, 2022

[Course: pluralsight] Getting Started with Jenkins

Content
Completion Date: 25-12-2022
December 25th, 2022

[Course: pluralsight] DevOps Foundations: Continuous Integration and Continuous Delivery

Content
Completion Date: 25-12-2022
December 21st, 2022

[Course: pluralsight] Docker Deep Dive

Course | Completion Date
Docker Deep Dive | 24-12-2022
Getting Started with Docker | 21-12-2022
Docker and Kubernetes: The Big Picture | 23-12-2022

December 3rd, 2022

[Book: Spring Microservice In Action]

Completion Date: 18-12-2022 🎉
My Project: firstMicroserviceArchitecture

Chapters                | Start~End time
Ch1~Ch6                 | 3~7   -12-2022
Ch7                     | 9     -12-2022
Ch8~Ch9                 | 12~13 -12-2022
Ch10                    | 15    -12-2022
Ch11~Ch12 + Appendix B  | 17~18 -12-2022
Appendix A              | null  -12-2022

November 27th, 2022

[Book: Spring Security In Action] Ch11

End time: 27-11-2022
November 14th, 2022

[Book: Spring Security In Action] Ch1 to Ch10

End time: 21-11-2022
October 30th, 2022

[Course: pluralsight]: Design Patterns in Java: Structural

https://app.pluralsight.com/achievements/share/f89cc1d1-fe0d-4125-9690-d5ea6ffc1844
To: 1-11-2022
October 30th, 2022

[Reading: refactoring.guru] The all of the articles in the "Structural Design Patterns" section

Content
To: 1-11-2022
October 25th, 2022

[Reading: refactoring.guru] The most of the articles in the "Creational Design Patterns" section

Content
To: 27-10-2022
October 25th, 2022

[Course: pluralsight]: Design Patterns in Java: Creational

https://app.pluralsight.com/achievements/share/aeaad0ba-9e53-47fc-a79e-f8da9b54762a
To: 27-10-2022
October 22nd, 2022

[Course: pluralsight]: Schema Modeling Patterns and Best Practices for Document Databases

https://app.pluralsight.com/achievements/share/752a271e-ac70-4c35-8d06-5da2498baf69
October 21st, 2022

[Course: pluralsight]: Foundations of Document Databases with MongoDB

https://app.pluralsight.com/achievements/share/92c431e6-69d5-43e4-84d3-5c7410e94876
October 21st, 2022

[Course: pluralsight]: Querying Data from MongoDB

https://app.pluralsight.com/achievements/share/eedc9e1b-0c4d-4db1-ae08-2575bf4a3e75
October 19th, 2022

[Course: pluralsight] Introduction to MongoDB 2

https://app.pluralsight.com/achievements/share/e6a4cab3-7a6a-4ede-bdf2-52f8beea8b70
October 6th, 2022

Spring Project: Expense Tracker

I used Java, Spring boot, Spring data, JUnit, Mockito, Lombox, Spring MVC, Git
https://github.com/zakaria-shahen/budgetManagement
August 28th, 2022

[Course: educative]: Docker for Developers

content
It was completed on 28-8-2022 🎉
August 26th, 2022

[Course: pluralsight]: SOLID Software Design Principles in Java 8

https://app.pluralsight.com/achievements/share/c74becce-fc8c-4f60-a622-58fbd6dcf224
August 2nd, 2022

[Course: ITI, pluralsight] Start ITI Tech Leaps program - Java track

content
Start: 2-8-2022
End: TODO
July 30th, 2022

[Course: educative]: Data Structures and Algorithms in Python

content
It was completed on 30-7-2022 🎉
April 27th, 2022

[Course: maharatech] ITI Tech Leaps program requirements

- [x] Accept (Email) - 10-5-2020
- [x] Java Programming - 3-5-2022
- [x] Web Fundamental (Html,CSS) - 27-4-2022
- [x] Freelancing - 13-2-2022
- [x] Database Fundamentals before Start Time
- [x] JavaScript - before Start Time
March 30th, 2022

[Course: educative]: Grokking Computer Networking for Software Engineers

content
March 16th, 2022

[Course: educative.io] OOP in Python

content
March 5th, 2022

[Read] [medium] The 4-Layer Internet Model Network Engineers Need to Know

The 4-Layer Internet Model Network Engineers Need to Know - medium
March 3rd, 2022

[Course: maharatech] Introduction to network security
Content

Network Security Concepts and Design

Network segmentation and Monitoring

Firewalls and Honeypots

Intrusion Detection and Prevention Systems

Wireless Networks Security

Protecting Your Network
February 25th, 2022

[Course: maharatech] Computer Network Fundamentals
Content

Introduction to Computer Networks

ISO/OSI Model (7 Layers)

TCP/IP Protocol Suite

Recorded Labs
February 24th, 2022

[Course: maharatech] JavaScript

Content
JavaScript Language Basics
JS functions
JS built-in objects
error Object
object Object
function Object
Browser Object Model (BOM)
Document Object Model (DOM)
Events
AJAX & JSON
OOP
February 20th, 2022

[Course: datacamp] Data Engineering for Everyone
Certificate
Content

What is data engineering?

Storing data

Moving and processing data
February 16th, 2022

[Course: pluralsight] Working with Databases in PHP
Content

PHP and Relational Databases

PHP Data Objects (PDO)

PHP and Non-relational Databases

Use Doctrine ORM
February 14th, 2022

[Course: pluralsight] PHP: Getting Started
Content

Diving into PHP

Processing Form Data

Using MySQL with PHP

MySQL Database Management

More Features and Conclusion
February 13th, 2022

[gist_Github] UML - Class Diagram - Cheat Sheet

gist
[Read] UML Class Diagram
February 13th, 2022

[Read][freecodecamp]The 3 Types of Design Patterns All Developers Should Know

article
February 12th, 2022

[Course: maharatech] Database Fundamentals
Content

Introduction (DBMS, DBMS Architecture , Data Models, ....)

ERD

ERD Mapping

SQL

DML

SQL other Object (View, Indexs)

Normalization
February 10th, 2022

[Read] MySQL 8 Labs: [Recursive] CTEs + Managing Hierarchical Data
MySQL 8.0 Labs: [Recursive]...

Common Table Expressions in MySQL (CTEs)

CTEs in MySQL, Part Two - how to generate series

CTEs in MySQL, Part Three - hierarchies

Managing Hierarchical Data in MySQL
February 9th, 2022

[Course: pluralsight] PHP: The Big Picture

Content
February 9th, 2022

[Course: maharatech] Building Web Applications using PHP & MYSQL
Content

Building the registration page

Saving the data to the database

Build SCRUD operations

Authentication

Forms Validations

Restructure the app to follow OOP principals
January 19th, 2022

[Course: datacamp] Database Design
Certificate
Content

Processing, Storing, and Organizing Data

Database Schemas and Normalization

Database Views

Database Management
December 30th, 2021

[Course: datacamp] Joining Data in SQL
Certificate
Content

Introduction to joins

Outer joins and cross joins

Set theory clauses

Subqueries
December 18th, 2021

[Course: udacity] React nanodegree nd019
Certificate
Content

React Fundamentals

React & Redux
December 5th, 2021

[Course: datacamp] Introduction to SQL Server
Certificate
Content

SELECTion Box

Groups, strings, and counting things

Joining tables

You've got the power
October 15th, 2021

[Course: CS50] CS50
Problem Sets (solutions)
Final Project
Content

C

Arrays

Algorithms

Memory

Data Structures

Python

SQL

HTML, CSS, JavaScript

Flask
August 18th, 2021

[Course: udacity] front end nanodegree nd0011
Certificate
Content

CSS & Website Layout

JavaScript and the DOM

Web APIs and Asynchronous Applications

Build Tools, Webpack, and Service Worker
June 1st, 2021

[Course: udacity] C++ For Programmers
Content

Compilation and Execution

Arithmetic Operations

Control Flow

Pointers

Arrays

Functions

Classes

Overloading

Templates

Classes and Inheritance

PolyMorphism

Vectors and Iterators

Interview Questions

C++ Checkpoint