Hire the Best Java GUI Developers
in Hungary

✅ I have crafted backend systems for four Fortune 500 companies in the banking, e-commerce, and AI industries, each generating over $4 million in revenue in their first year. Furthermore, I spearheaded the development of internal CRM systems for three companies, resulting in a remarkable 54% decrease in operational costs. If you're looking for an experienced developer who delivers robust solutions and boosts revenue, feel free to reach out. I'm a top-rated professional on Upwork. ⭕ Reach out to me for high-quality projects based on Java and Python. ⚙️ Possessing a robust understanding of Agile Software Development processes (Scrum, Waterfall, Hybrid, Agile) and expertise in Code Review processes across projects of varying scales. 🤝 A collaborative team player with the ability to effectively engage with architects, engineers, and product management to deliver user-friendly and visually appealing results. ▪️ Take pleasure in producing clean, well-written, and highly efficient code in my projects. I firmly believe that good communication is the key to creating successful products. Key technologies: ✅ Microservices development ✅ Python ✅ Java 13 ✅ Kotlin ✅ Spring boot, Spring cloud ✅ Kubernetes ✅ PostgreSql ✅ Angular ✅ Redis ✅ ElasticSearch ✅ RabbitMQ ✅ Spring Security ✅ Keycloak ✅ Maven ✅ WebSocket ✅ MongoDB ✅ Docker ✅ Jenkins ✅ GraphQL ✅ TestContainers and Cucumber ✅ CI/CD: GitLab CI ✅ Open AI API Key Qualifications: ⭐ Expert understanding of Java and Python technologies ⭐ Understand needs of company of any scale ⭐ Development of software, mobile apps, web apps ⭐ High-performance, maintainable and reusable code ⭐ 7+ years of experience ⭐ Self-starter, hard worker, organized, attentive to details and a team player ⭐ Good communication skills

I’m a senior Java backend developer with 16 years of experience, specializing in Java, Spring Boot, and Maven. I focus on backend architecture, modularization, and the modernization of legacy systems - delivering clear, maintainable, and production-ready code. I’ve built and maintained systems in banking, trading, and internal enterprise tools. I’m particularly experienced in cleaning up large, outdated codebases: refactoring, extracting modules, and introducing structure where it’s lacking. Beyond Java, Spring, and Maven, I regularly work with: - Persistence & Databases: Hibernate, Blaze-Persistence, Liquibase, Flyway, SQL (PostgreSQL, H2) - Web & Integration: JSF, PrimeFaces, REST APIs, gRPC, Protocol Buffers - Testing: JUnit, Mockito, PowerMock, Testcontainers - Build & DevOps: Jenkins, Docker, Git - Reporting & Documentation: JasperReports, PlantUML Whether you need to break a monolith into modules, modernize a legacy system, or get a chaotic project back under control, I deliver practical solutions without overengineering. I work independently, communicate clearly, and build solid software that lasts. My spoken English is limited. I prefer written communication. Please expect text-first collaboration; I can join brief voice calls for kickoffs or clarifications.