![](http://about.dkiriusin.com/wp-content/uploads/2023/03/denis2.png)
Enthusiastic and well-organised Java Web Developer with 10+ years of experience. I have strong problem-solving skills with great attention to detail and mainly focusing on highly-available, high-performance and secure systems.
Skills
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_UI.png)
Frontend
Comprehensive Angular skills and good understanding of core web design principles. HTML, CSS, native JavaScript as well as popular libraries like JQuery and Bootstrap.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_API.png)
Backend
Strong experience implementing RESTful and SOAP-based APIs. Working with different architecture stacks including containerized, self-contained and vendor-dependent APIs.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_SQL.png)
Database
Writing SQL queries, stored procedures and functions. JPA and Spring Data experience.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_Test.png)
Testing
Unit testing of Java methods. Integration testing with mocks and stubs. BDD testing using Cucumber tool. Experience testing Angular applications with Jasmine Karma and Protractor frameworks.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_Security.png)
Security
Extensive Spring Security experience including cookie-based and token-based OAuth 2.0 / OpenID authorisation and authentication protocols. Good understanding of different OAuth 2.0 authorisation flows and filter chains.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_Linux.png)
Linux
Using as my home operating system. Experience in shell scripting, basic administration, networking and security.
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/icon_Tools.png)
Tools
Git, Maven, Jenkins, Docker, Docker Compose, Open Shift, SVN, Jira, IntelliJ IDEA.
Personal Projects
Authorizatorius
https://authorizatorius.dkiriusin.com/
Application written in order to improve my OAuth 2.0 / OpenID protocol skills and allows accessing remote protected resource using different token providers.
Application consists of four Docker containers:
- nginx — running as reverse proxy with SSL support
- oauth2-ui — Angular Material frontend
- oauth2-client — Spring Security based OAuth 2.0 client
- oauth2-protected-resource — Spring Security based OAuth 2.0 protected resource server
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/authorizatorius_6.png)
Combinatorius
http://combinatorius.dkiriusin.com/
Application written in order to demonstrate my HTTP protocol skills. It combines multiple CSS and JavaScript files into a single bundle for faster response and applies smart headers for caching and versioning.
Technological stack:
- JSP / Servlets
- HTML, CSS, JavaScript
- Nginx / Apache Tomcat
- Maven / Docker
![](http://about.dkiriusin.com/wp-content/uploads/2023/03/combinatorius_5.png)