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AndrzejSzelag/README.md

Hi, I'm Andrzej

Software Engineer (Java & Python), Data Science, ML & AI Enthusiast

About Me

  • Currently working as a Java Developer Freelancer.
  • Continuously enhancing my expertise in Spring (with a particular focus on Spring Security), and Clean Architecture (including SOLID principles).
  • Interest in DevOps practices (CI/CD, automation, cloud solutions), Data Science and Machine Learning.
  • Exploring the potential of Artificial Intelligence in software development.
  • I studied at Harvard University and Lodz University of Technology, and I hold Microsoft certifications as a Security Administrator and Engineer.

Last Projects

1. Keycloak JWT Validator 🔗 GitHub Repo

REST API Spring Boot React Gradle Keycloak

A fullstack REST API application to decode and validate JWT tokens issued by Keycloak. Backend configured as an OAuth2 Resource Server using NimbusJwtDecoder for token signature validation.

2. GYM 🔗 GitHub Repo

Spring Boot Maven Hibernate ORM Lombok PostgreSQL Thymeleaf

A Spring Boot-based MVC web application using Hibernate ORM and PostgreSQL for managing gym member data, implementing the Builder creational design pattern for flexible object construction.

3. Fault Management System 🔗 GitHub Repo

Java EE Maven Lombok Boot Faces Oracle Database Payara Server

IT System for Managing Railway Traffic Control (RTC) System Failures on Mining Railways is a Java EE enterprise application with an MVC architecture and the Facade structural design pattern for simplified subsystem access.

GitHub Stats

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  1. keycloak-jwt-validator-springboot-react keycloak-jwt-validator-springboot-react Public

    A fullstack REST API application to decode and validate JWT tokens issued by Keycloak. Backend configured as an OAuth2 Resource Server using NimbusJwtDecoder for token signature validation.

    Java 1

  2. fms fms Public

    IT System for Managing Railway Traffic Control (RTC) System Failures on Mining Railways is a Java EE enterprise application with an MVC architecture and the Facade structural design pattern for sim…

    Java 1 1

  3. oauth2githubssl oauth2githubssl Public

    A Spring Boot web application configured to use OAuth 2.0 with GitHub API and self-signed SSL certificate.

    Java

  4. network network Public

    A Twitter-like social network website for making posts and following users

    Python 2

  5. capstone capstone Public

    A web application of your own with Python and JavaScript

    Python

  6. gym gym Public

    A Spring Boot-based MVC web application using Hibernate ORM and PostgreSQL for managing gym member data, implementing the Builder creational design pattern for flexible object construction.

    Java