Elgun B.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Programming languages :  Java (J2SE, J2EE, J2ME), Spring  C# (.Net, .NetCore)  JavaScript, TypeScript Angular, React Web and Desktop Technologies :  JSON, JSF, PrimeFaces, Servlet, JSP  GWT Framework, Ext GWT, Ext JS, Smart GWT, RPC  Web Services(Axis, Jax-RS, WSDL, RestFull, WCF, ASMX)  Spring Boot, Spring MVC, Web-API  Apache-Kafka, Rappid MQ  JMS, RMI, JDBS, DBPool, JNDI, Swing, AWT, JNI  Swagger, OpenApi Front-End Technologies :  Angular2+, Material Design, Angular Universal, PWA  React, Redux, React Hooks  HTML5, CSS3, SCSS, AJAX, JQuery, Bootstrap Cloud Technologies :  AWS (Lambda , S3, DynamoDB, MKS, RDS, Cognito, Elasticache, DMS, IAM)  Azure (Lambda , Service Bus, AzureAD) Web and App. Securyty :  TOMCAT REALM  JAR (Sign, Obfuscation)  SPRING SECURITY  MOBILE-SIGN, E-SIGN  SSL(HTTPS)  JWT(JSON WEB TOKEN)  OAUTH SSL HTTPS CodeQuaity, Coverage, Testing/CI/CD:  Mockito, Contract Testing, Unit Testing, Integration Testing, ComponentTesting,  SonarQube(Code Coverage, Vulnerabilities),  Kubernates, Jenkins Functional languages :  XML (xsl, fo), XSD Databases :  Oracle + PL/SQL  MySQL  PostgreSQL  SQL Server  MongoDB  Redis ORM : (Object Relational Mapping framework )  Hibernate,  JPA,  Entity Framework Web/Application servers :  JBOSS Application server  Apache Tomcat  IIS Version Control :  CVS  SVN  GIT Operation Systems :  Windows  Ubuntu, CentOS  MacOS