Alex 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 Nov 5, 2026.

Being a Back-End Developer with about 15 years of work experience, I mainly focus on Java and Spring development for Healthcare Enterprise clients, building complex Insurance Billing Software and Medical Clinics Management Solutions for Therapists, Hospital Staff, and Patients. In addition, I have hands-on experience in working with Automated Banking Systems and EV Charging Station Management Systems. Invite me for an interview if you feel I’m the right person to turn your ideas into reality. TECHNOLOGIES I USE ✅ LANGUAGES: Java, C/C++, JavaScript ✅ FRAMEWORKS, TECHNOLOGIES: Spring (Cloud, Data), Apache Camel, Docker, Flyway, REST APIs, Jasper Reports, JXLS, GWT, XML, Hibernate, JPA, Query DSL, JOOQ, EJB, FLEX, TIBCO (EMS, AMX BPM, AMX ServiceGrid), AWS ✅ DATABASES: MySQL, MS SQL, H2/HSQLDB, Sybase ASE ✅ VCS: Git, SVN, CVS ✅ BUILD AUTOMATION: Jenkins, Azure DevOps ✅ APPLICATION SERVERS: Jboss (Wildfly), Spring Boot, Glassfish, Tomcat, Sybase EAServer (Jaguar) ✅ TESTING TOOLS/FRAMEWORKS: SoapUI, JUnit, JMock, Mockito, dbUnit ✅ DEVELOPMENT ENVIRONMENT: IntelliJ IDEA, Eclipse, NetBeans, Visual Studio In addition to the above, I possess a solid grasp of Algorithms and Data Structures. Also, I have extensive skills in the development of Microservice architectures. MY MOST RECENT PROJECTS ✅ myMPS — medical billing practice management software. It is a platform that links practices, patients, and their insurance companies. It allows practices to capture visits and claims and send them to insurance companies to be paid. ✅ CHMS (Clinical Healthcare Management System) — Doctors use this software to treat clinical patients. The platform can be used to schedule appointments, get metrics, generate reports, and integrate with external systems, such as laboratory software. On the majority of the above projects, I performed as a Team Lead and was responsible for Microservice architectures, as well as provided assistance to the DevOps team. LANGUAGES I SPEAK Ukrainian is my native language. Besides, I have strong English skills. Most of my previous customers were English-speaking, so I am comfortable communicating in English. MY TEAM I am at ease as an individual contributor, but being a team player works best for me. So I joined Extrawest — an Upwork Top Rated Agency focused on Healthcare, Insurance and Clinic Management Software, FinTech and Banking, Gambling and Betting, Food Ordering and Delivery, Logistics and Fleet Management, and special software for Electric Vehicles Charging Station networks since 2006. Having most of our resources based in Europe, we’ve been working with customers from over 20 countries (the US, Canada, Australia, most of the EU, South Africa, Singapore, Japan). Hence, it won’t be a problem for us to adjust to your timezone and working schedule. INVITE ME FOR AN INTERVIEW If you feel I’m a perfect match for your project, invite me, and let’s streamline your business’s growth! 🟩 🟩 🟩 🟩 My Agency Skills: Front-End (Frontend) Development, Back-End (Backend) Development, Full-Stack (Fullstack) Development, Mobile Development, EV Charging Station Management, Automotive, Logistics, Delivery, Food Ordering, FinTech, Finance, Banking, Accounting, Dashboard, Healthcare, Insurance, Clinic Management System, Medical Software, HealthTech, MedTech, InsurTech, Betting, Gambling, Data Scraping, Flutter, Dart, JavaScript (JS), TypeScript (TS), Angular, Vue.js (VueJS, Vue), React.js (ReactJS, React), Node.js (NodeJS, Node), Java, Spring, SpringBoot, Hibernate, Python, Django, Scrapy, Quality Assurance (QA), Manual Testing, Automated Testing, Selenium, UI/UX Design, User Interface (UI), User Experience (UX), Figma, Adobe Creative Cloud, DevOps, MySQL, PostgreSQL, MongoDB, Firebase, Docker, Amazon Web Services (AWS), Google Cloud Platform (GCP), Project Management (PM).