My Skills

Operating Systems

• Linux
• Android
• Windows

Ecosystems

• Vertx
• Spring, Spring Boot

Programming Languages & Concepts

• Java
• Java Concurrency
• JavaScript/ECMAScript
• Groovy

Java EE

• Java Message Service (JMS), Spring JMS
• Servlets, JSP & Custom tags

Other

• Elasticsearch
• ActiveMQ Artemis

Testing

• Test Driven Development
• JUnit 4, JUnit 5
• Mockito
• TestNG
• Gatling

Frameworks & Libraries

• Spring Boot
• Spring Security
• Spring AOP
• Spring Data
• Spring JMS
• Lombok, MapStruct, Immutables

Persistence

• SQL
• Spring Data JPA
• Spring Data Elasticsearch
• JPA
• Hibernate 5+6
• Java Bean Validation
• Liquibase
• MariaDB

Web, backend

• REST (Representational State Transfer)
• JSON
• OpenAPI
• Swagger UI
• Spring WebMVC
• Spring WebFlux
• Spring Security OAuth2, Spring Security OpenID Connect
• Thymeleaf

Web, frontend

• Progressive Web App's
• Ajax & JSON
• WebSocket, HTTP2
• Google Maps API
• Leaflet JS & OpenStreetMap
• JavaScript Workers
• JavaScript Service Workers
• Accessibility & Usability
• Web Standards
• HTML, HTML5, XHTML, XHTML5
• Cross Site Scripting, OWASP
• Search Engine Optimization (SEO)
• CSS, CSS3, SCSS

DevOps

• Gradle
• Git
• IntelliJ