Oleksii Kushch

Solution Competency: E-Commerce

Project Description:

Training project where we developed an e-commerce soution (website) using Hybris Commerce. While Hybris provides numerous good ready-made solutions, many aspects require customization, additional scripting, or the creation of new features based on existing solutions. This demands not only consideration for writing high-quality code but also practicing various architectural approaches and solutions when working with existing source code that cannot be edit. On top of that, this project provides invaluable experience in teamwork, involving collaboration with developers of varying expertise levels. This includes not only individual task assignments but also working on larger and more complex tasks in pairs or larger groups, which can, in turn, create additional challenges in communication, actual code writing, and version control. Such experience is truly important and enables us to deal with similar issues much faster and more efficiently in the future.

Worked on:

Implementing: "product comparison", "customer anonymization", “recommended product”, “customer reaction to review” functionality;

Integration Cucumber for BDD tests into the project; updating the Hybris version in the project (from 1905 to 2005 and then to 2011).

Also worked with:

Registration with referral code, as well as loyalty/bonus, premium, and achievement systems;

pagination and facets (filters); "remember me", "sending email" features.

Team:

The average team size is 8 members, including 2 team leads, 1 DevOps specialist, and all other members are developers.

Technologies:

SAP Commerce Cloud(Hybris Commerce 1905 - 2011),

Java 11, Spring Framework,

JSP, JavaScript,

Apache Ant,

Junit, Mockito, Cucumber,

SQL,

GitLab, Jira.

Project Description:

Two not-so-large projects with similar technology stacks. The first is my pet project (a web system built on servlets). The second project is divided into 3 modules and includes 16 tasks, which were completed under the guidance of mentors and covered various aspects of Java development. These topics include: working with Git, unit and integration testing, code documentation, working with collections, working with files, multithreading, practical implementation of design patterns such as "chain of responsibility," "strategy," "command," "abstract factory," "template method," "iterator," "dynamic proxies." Important concepts such as 'context' and 'dependency injection' were also covered.

GitHub links:

My pet project CahsSys – https://github.com/OleksiiKushch/CashSys5

EPAM Java practice – https://github.com/OleksiiKushch/practice-EPAM-Java-Lab-Winter-2022

The most challenged:

Implementation of captcha;

Search for prime numbers within a given range (parallel implementation);

Database: MySQL server

Tools:

IntelliJ IDEA Community (main development environment);

MySQL Workbench 8.0 CE (MySQL DBMS for managing database);

Postman and web browsers (Google Chrome, Mozilla Firefox, ...) (for testing and documentation);

Technologies:

Java SE, Java EE, Java Servlet API (Jakarta Servlet), Apache Tomcat,

JSP, JSTL, HTML, CSS, Bootstrap, JavaScript, jQuery, AJAX,

Junit, Mockito, PowerMockito,

MySQL,

GitLab, GitHub.

5st course (1 years):

Modern Paradigms of Programming and Modeling Complex Systems (Scala),

Documentation and Control of IT Project Development Processes (Scrum, Jira),

High-Performance Systems for Processing and Analyzing Big Data (Docker),

Intelligent analysis in Big Data (Python, DataFrame, Jupyter Notebook).

1st course:

Algorithmization and Programming, Object-oriented Programming (C++),

Theory of Algorithms, Discrete Mathematics, Advanced Mathematics (Mathcad), Numerical Method (MATLAB).

2st course:

Cross-Platform Development (Java),

Computer-Aided Design (CASE, ERwin Data Modeler, BPwin), Technology / Methodology of Creating Software Information Systems (IDEF0, IDEF1Х, ER-diagram, UML),

Web Technologies and Web Design (HTML, CSS, JavaScript, jQuery),

Database Design and Management, Relational Databases (MySQL, MySQL Workbench DBMS).

3st course:

NoSQL databases (MongoDB),

Programming Patterns (GoF Design Patterns),

Design of High-Throughput/Performance Data Storage Systems, Advanced of Relational Databases (MySQL),

Designing Information Systems, System Analysis (DFD, IDEF3), Object-oriented Analysis in Design.

4st course:

Agile Methodologies for Designing (Jira, Git),

Administration and Maintenance of Systems (Oracle VM VirtualBox, VMware, Microsoft Windows),

Internet Technologies for Distributed Information Processing (XML, XSD, XSLT) (Java EE, Java Servlet API, JSP), Service-Oriented Architecture (SOA) for software (Swagger), Enterprise Web Application Development Technologies,

Development of UX (User Experience) and UI (User Interface).

Thesis:

Development of components for the payment and cash servicing information system.

Development of text editor functionality such as word autocomplete, error highlighting and correction suggestions, and text complexity analysis. Various data structures were used in the implementation, such as trees (binary tree), linked lists, and others.

A solid course providing strong knowledge in algorithm theory, including basic concepts like Time Complexity (Big O), as well as more complex notions such as Dynamic Programming. And most importantly, all the theory is reinforced through practice. Tasks such as Polynomial Multiplication or Maximum Value of an Arithmetic Expression were implemented, and more.

Development of a small application for tracking tectonic activities worldwide (data processing and display).

Analysis and creation of UML diagrams and the development of a small Android application based on a provided UML diagram.