Oleg K.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 Mar 30, 2026.

"⭐️⭐️⭐️⭐️⭐️ Recommended. Always fast, efficient and always open to discussion. The assigned tasks were performed at a high level. It was easy to find common ground..." I am Top-Rated Full Stack Developer with 10 years of experience in Web/Software development. I do development, designing, debugging, covering with tests, analytics of architecture, finding the best solutions for your needs, increasing performance, finding solutions, team-leading, and managing teams of up to 10 people. I was working on various projects and different roles. I am great as a standalone developer and also perfect as a team player. I worked with 90+ Clients Across Various Platforms 🏆🔥 I am proficient in: Font-end ✅ HTML/HTML5 ✅ CSS/CSS3 ✅ JavaScript ✅ Jquery/Ajax ✅ JSP ✅ AngularJS/Angular2+ ✅ React ✅ Bootstrap ✅ FontAwesome Databases ✅ MySQL ✅ PostgreSQL ✅ MS Access ✅ MSSQL ✅ OracleDB ✅ MongoDB Programming Languages/ Technologies ✅ Java ✅ TypeScript ✅ JavaScript ✅ Software Architecture Design ✅ UML ✅ Reverse Engineering ✅ Design Patterns ✅ JDBC ✅ RMI ✅ Maven ✅ JSP ✅ Servlets ✅ Web Services ✅ JPA ✅ DataSource ✅ DBCP ✅ Rest ✅ SQL ✅ SpEl Application/Web Servers ✅ Apache Tomcat ✅ NGINX Frameworks ✅ Spring ✅ Spring Security ✅ Spring MVC ✅ Hibernate ✅ Capacitor ✅ JPA ✅ Spring Data ✅ Spring Oauth2.0 ✅ EJB ✅ JUnit Development Tools ✅ Eclipse ✅ NetBeans ✅ IntelliJ idea ✅ Git Bash ✅ SmartGit ✅ Visual Studio Code ✅ Sublime Text Editor ✅ JUnit/ Log4J If you are looking for a developer who can deliver the highest quality code, facilitate easy and comprehensive communication, engage in detail-oriented programming, and ultimately satisfy the customer, you have found the right person. Looking forward to our cooperation! Best, Oleg.