06/30/2026 updated
100 % available
Senior Fullstack Java Developer
Dunakeszi, Hungary
Only remote
Advanced Diploma in Software DevelopmentAbout me
Senior Full Stack Developer with 20+ years building robust, high-performance applications. Expert in Java, Spring Boot, and Angular, with deep experience in microservices, Kafka, Docker, and Kubernetes. Passionate about scalable architecture, DevOps, and delivering impactful, reliable software.
AI AgentsGitHub CopilotJava (Programming Language)PHPSpring SecurityAdobe PhotoshopC Sharp (Programming Language)C++ (Programming Language)DevOpsElasticsearchGitHubJava ArchitecturesJava Development ToolsPostgreSQLMySQL
Java Backend Development
Extensive expertise in Java-based backend development, including microservices architectures with Spring Boot and Hibernate, RESTful API design, event-driven systems using Apache Kafka and IBM MQ, and real-time high-frequency data processing.
Frontend Development with Angular
Strong proficiency in building maintainable, high-performance single-page applications using Angular, including modular design, component reusability, Angular Material component libraries, and responsive user interfaces.
DevOps & Containerization
Solid experience with DevOps practices including CI/CD pipeline management via GitLab CI, containerization with Docker and Kubernetes, OpenShift deployments, and automated testing strategies to ensure application reliability and scalability.
Microservices Architecture
Design and implementation of scalable microservices-based systems, including service decoupling, asynchronous communication, and integration with enterprise messaging systems.
SQL & Database Technologies
Proficiency in SQL, MySQL, MyBatis, Redis, and Elasticsearch for data storage, retrieval optimization, and real-time analytics.
TypeScript & JavaScript
Hands-on experience with TypeScript and JavaScript for both frontend and backend development, including jQuery and related frameworks.
Cloud & AWS Services
Familiarity with AWS services including AWS Lambda, AWS CodeCommit, and AWS CLI for cloud-based application development and deployment.
.NET Framework & ASP.NET
Experience with .NET Framework and ASP.NET for building enterprise-grade web applications and services.
C++ & C# Desktop Development
Background in developing complex GUI components and desktop applications using C++ (MFC) and C# with Windows Forms, including image processing and annotation tools.
Python & PHP
Working knowledge of Python and PHP for scripting, automation, and web development tasks.
Extensive expertise in Java-based backend development, including microservices architectures with Spring Boot and Hibernate, RESTful API design, event-driven systems using Apache Kafka and IBM MQ, and real-time high-frequency data processing.
Frontend Development with Angular
Strong proficiency in building maintainable, high-performance single-page applications using Angular, including modular design, component reusability, Angular Material component libraries, and responsive user interfaces.
DevOps & Containerization
Solid experience with DevOps practices including CI/CD pipeline management via GitLab CI, containerization with Docker and Kubernetes, OpenShift deployments, and automated testing strategies to ensure application reliability and scalability.
Microservices Architecture
Design and implementation of scalable microservices-based systems, including service decoupling, asynchronous communication, and integration with enterprise messaging systems.
SQL & Database Technologies
Proficiency in SQL, MySQL, MyBatis, Redis, and Elasticsearch for data storage, retrieval optimization, and real-time analytics.
TypeScript & JavaScript
Hands-on experience with TypeScript and JavaScript for both frontend and backend development, including jQuery and related frameworks.
Cloud & AWS Services
Familiarity with AWS services including AWS Lambda, AWS CodeCommit, and AWS CLI for cloud-based application development and deployment.
.NET Framework & ASP.NET
Experience with .NET Framework and ASP.NET for building enterprise-grade web applications and services.
C++ & C# Desktop Development
Background in developing complex GUI components and desktop applications using C++ (MFC) and C# with Windows Forms, including image processing and annotation tools.
Python & PHP
Working knowledge of Python and PHP for scripting, automation, and web development tasks.
Experience
Professional experience10+ years
Freelancer since2020
Languages
EnglishFluentHungarianNative speaker
Project history
Developed Java-based backend solutions for high-frequency data capture and officiating systems used in elite sports. Utilized JVM profiling and memory management techniques to handle massive bursts of data during live match play. Partnered with computer vision and hardware teams to integrate backend logic with proprietary optical tracking sensors.
Architected and developed a scalable microservices-based system using Java, Spring Boot, and Hibernate. Designed event-driven architecture using Apache Kafka and IBM MQ. Engineered secure, high-performance RESTful APIs. Integrated Elasticsearch for real-time search and analytics. Pioneered AI agent integration into the SDLC using Spring AI. Built SPAs with Angular and managed CI/CD pipelines using GitLab CI.
Led the development and modernization of a legacy Java 8/Struts application, including feature implementation, code reviews, and junior developer mentorship. Championed code quality improvements through refactoring and behavior-driven unit testing. Formulated a strategic plan to transition the architecture to microservices and upgrade the frontend to Angular 6.