Hire the Best Apache Struts Developers
in Ukraine

I deliver production-ready Java backends that scale. With 100% Job Success and $10K+ earned across 22 contracts, I solve complex integration challenges, refactor legacy systems, and build APIs that handle real-world traffic. Client Testimonials: "Oleksandr is a genuine professional who was able to do a complex Java project for me." – Sweet Home 3D Client "Fast developer, always in contact, reasonable price policy. Would work with him again." – Spring Boot Projects Client What I Deliver: Spring Boot APIs – REST endpoints, authentication (Spring Security), database integration (JPA/Hibernate) Database Solutions – PostgreSQL schema design, query optimization, MongoDB aggregations Legacy Refactoring – Clean up messy code, introduce testing (JUnit/Mockito), containerize with Docker Third-Party Integrations – Payment gateways, calendar APIs, external data syncs Testing & Quality – Unit tests, integration tests, TestContainers for reliable deployments Tech Stack: Backend: Java (8/11/17/21), Spring Boot, Spring Data JPA, Spring Security, Hibernate Frontend: CSS/HTML, JavaScript/TypeScript Databases: PostgreSQL, MySQL, MongoDB APIs: REST, JSON/XML, Swagger/OpenAPI Testing: JUnit, Mockito, TestContainers DevOps: Docker, Maven, Git, GitHub Actions Principles: OOP, SOLID, TDD, GOF Design Patterns Why Hire Me: ✔ Fast turnaround – Average response time: 0-4 hours ✔ Clear communication – Tagged "Clear Communicator" by 5 clients ✔ Proven reliability – Top Rated, 100% Job Success, no failed contracts ✔ Real-world experience – From startups to clinical trial systems Have a backend challenge? Let's architect a solution together. 📩 Send me your project details, and I'll respond with a technical approach within hours.

I am a seasoned software developer with over 10 years of experience specializing in Backend and Full-Stack development. I pride myself on my excellent problem-solving skills and have a strong passion for writing clean and testable code. Clear communication is one of my strengths, making me a valuable team member in any software development project. Preferred Tech Stack: Backend: Java, Spring Boot, Thymeleaf, REST API, PostgreSQL, AWS, Linux, Tomcat, Nginx Frontend (Web): HTML, CSS, Sass, Javascript Frontend (Mobile): Flutter, Dart Cross-Platform: Flutter, Dart I am also proficient in the following technologies: Languages: Java, Scala, Groovy, Kotlin, Golang, JavaScript, TypeScript, Python, Dart, SQL Databases: PostgreSQL, MySQL, Oracle, Cassandra, MongoDB, SQLite, Neo4j Frameworks (Backend): Spring Boot, Spring Security, OpenAPI, Kafka, Zookeeper, Grails Frameworks (Frontend): Angular, React, Flutter, jQuery, Bootstrap Security: Spring Security, OAuth, JWT Technologies: HTML, CSS, JSON, XML, REST API API: REST API, OpenAPI, Swagger Messaging: Kafka, ActiveMQ, RabbitMQ Search: ElasticSearch, Lucene, Kibana Logging: ElasticSearch, Logstash, Kibana Cloud Providers: AWS, Google Cloud Testing: JUnit, Mockito, TestNG, Selenium, Cucumber, Katalon Studio Development Tools: Intellij IDEA, VSCode, Android Studio

👋 Hello! Senior Java Developer, Team Lead & Architect with 10+ years of hands-on experience with 10+ years of hands-on experience building scalable, high-load web and mobile applications. I mainly work with Java backend, JavaScript, TypeScript, Oracle, Postgres databases. My core backend work is centered on Spring Boot, focusing on API development and production-grade RESTful services backed by PostgreSQL. My focus is on backend software architecture, ensuring scalability, clean boundaries, and long-term maintainability. ✔️ Ready-to-Use Integrations I can accelerate your product using proven, production-ready integrations: 🚀 AI & LLMs: ChatGPT, LLaMA, Mistral (text, images, vision, automation) 🚀 Payments: Stripe (card payments & transfers) 🚀 Voice & Media: ElevenLabs (speech & voice AI) 🚀 Communication: Zoom (voice & video integrations) My Specialization: ✅ Backend & Architecture: Java (10+ years): modern Java (Lambdas, Streams, Date/Time API), Spring (9+ years): Spring Boot, Spring Data, Spring Cloud for microservices and distributed systems, and Java EE: REST APIs, SOAP, JPA, third-party integrations ✅ Security & Frameworks: Keycloak with OAuth2 and JWT-based authentication, JHipster, Swagger, Liquibase, Axon, Vaadin, ORM: Hibernate, Blaze-Persistence ✅ Databases & Messaging: SQL (10+ years): PostgreSQL, MySQL, MariaDB, Oracle, NoSQL: MongoDB, Redis, Hazelcast, Messaging: Kafka, ActiveMQ, RabbitMQ, Zookeeper, Firebase Messaging ✅ DevOps & Observability: CI/CD: Jenkins, Docker, Kubernetes, ELK Stack (Logstash, Elasticsearch, Kibana) ✅ Quality & Delivery: Testing: JUnit, Mockito, Spring Test, Unit & Integration testing, Full SDLC, code reviews, refactoring, clean architecture 💡 Let’s discuss how I can help you build a reliable, scalable solution!

I specialize in developing Java web applications using Spring framework. From RESTful Web services to narrowly specialized apps for text recognition and other enterprise tasks. Both front-end and back-end. Also, I can design a relational database using any system you want. Skills: - Java - Spring Framework - Spring Boot - Keycloak - Vert.x - Quarkus - Vue.js - Vaadin Framework - JAX-RS - Hibernate - JSP - Freemarker - Thymeleaf - HTML/CSS - JavaScript - jQuery - Bootstrap - Tesseract OCR, Nicomsoft OCR - MySQL, PostgreSQL, Informix IBM SQL, SQLite - ElasticSearch - MongoDB I have a master degree in Software Engineering from Kyiv Polytechnic Institute. As a developer, I have also taken part and won large number of hackathons.

🏆 10+ years of experience as Software Engineer 🎯Delivered for insurance, telecommunications, security/surveillance domains, business management platforms ✅ Frameworks & Tools: Java/J2EE, Spring Boot, MSSQL, MongoDB, Docker, Hibernate, REST, Liferay, JUnit, Jenkins, Maven, Ant, API Integration. Java Backend development is one of my strengths, I will bring to you apps with modern, attractive, simple, and easy to use functionality. I'm very friendly, straightforward, honest, hard working and very easy to work with. I am looking for long-term relationship with clients, come and work with me to find out that I am your excellent partner. I'm looking forward to know more about your app idea to bring it to life!

✔ [ Java ] [ Golang Go ] [Python][ API development ] [ Microservices ] [ REST ] [ gRPC ] ✔ [ iText ] [ POI ] [ JAXB ] [ XJC ] [ XPath ] [ Jackson ] [ mapstruct ] [ RMI ] ✔ [ Struts ] [ Spring ] [ DATA ] [ BOOT ] [ MVC ] [ Batch ] [ SAML ] [ Security ] [ Netty ] [ LightStreamer ] ✔ [ AngularJS ] [ Angular ] [ JavaScript ] [ jQuery ] [ HTML5 ] [ SocketIO ] [ SVG ] [ JSP ] ✔ [ Redis ] [ SQL ] [ MongoDB ] [ MySQL ] [ GraphQL ] [ Hibernate ] ✔ [ Docker ] [ NGINX] [ Apache ] [ Tomcat ] [ Jetty ] [ Server administration ] [ Load Balancing ] [ *NIX ] [ Security ] [ Networking ] [ Cloud ] [ Consul ] [ proftpd ] [ wekan ] [ gogh ] [ rocketchat ] ✔ [ AJAX ] [ JSON ] [ cURL ] [ Graph API ] [ Oauth 2.0 ] [ OOP ] [ UX/UI ] ✔ [ Jenkins ] [ Mockito ] [ Junit ] [ Selenium ] [ Junit ] [ Ganymed-ssh ] [ Quartz ] ✔ [ RabbitMQ ] [ ActiveMQ ] ✔ [ Android native ] ✔ [ Smart Contracts ] [ DApps ] [ Ethereum ] [ EOS ] [ ERC20 ] [ ERC721 ] [ Web3 ] [ MetaMask ] [ oraclize ] ✔ [information security] [iso 27001]