For the last years I was working on projects considered the following skills:
Back-end technologies:
Spring Framework, Spring Security, Spring Boot, Struts2
Liferay 6.1/6.2/7+
JPA/Hibernate + Spring-Data
Data Scraping using HTMLUnit
REST and WebServices (Spring-Boot, Akka-Http)
Solr, Lucene, ElasticSearch integration
Payment Gateways Integration (Stripe, PsiGate)
Java-based servers - Tomcat, JBoss
JasperReports
Databases:
Front-end technologies:
Template engines: Thymeleaf, JSP/JSTL, Freemarker, Velocity
JQuery and Bootstrap
AngularJS, ReactJS, NodeJS, HTML4/5,XHTML, XML, CSS3
SDLC
Agile and Scrum programming methodology
TDD using JUnit
Eclipse and Intellij IDEA
Git, SVN and CVS code repositories
Maven, Ant, and Gradle build tools
Jenkins
Agile Tool: Trello, Jira
Cloud
Amazon cloud deployment using EC2
Amazon file sharing S3
Amazon cloud database using RDS
Amazon Route53
I am sure I can help you building effective solutions for your business and provide the best quality support of them.