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Viktor Balassa

@viktorbalassa

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Senior Java Developer at Zenitech, developing a serverless adapter and healthcare applications with Micronaut.

Hungary

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At Zenitech, I use Micronaut to develop a serverless adapter application and build scalable applications for a healthcare company. I also design PostgreSQL schemas and develop Java server-side GraphQL APIs with Spring Boot.

At NN Insurance Co., I developed Java Spring microservices and contributed to internal library development while maintaining existing solutions. I also worked with Jenkins, Docker, and Kubernetes, and mentored junior developers.

Earlier, I developed Java-based backend systems at Astron IT Ltd. and assisted with Java application development at Grepton IT Ltd. My work has included Spring, Hibernate, Java EE, and software for diverse clients.

Experience

Work history, roles, and key accomplishments

Current

Senior Java Developer

Current

Zenitech

Mar 2026 - Present (6 months)

Developed a serverless adapter application using Micronaut and designed relational database schemas in PostgreSQL. Reviewed code and debugged errors to improve performance.

Micronaut Framework Java 25 PostgreSQL Junit WireMock Mockito GraphQL Spring Boot

Senior Java Developer

NN Insurance Co.

Oct 2022 - Feb 2026 (3 years 4 months)

Developed Java Spring based microservices and conducted code reviews to ensure best practices. Mentored junior developers and contributed to internal library development.

Java Spring Framework Microservices Jenkins Docker Kubernetes Hashicorp JMeter Enterprise Architect Junit Mockito SQL Server MySQL PostgreSQL OAuth Agile Jira Atlassian

Medior Java Developer

Astor

May 2020 - Apr 2022 (1 year 11 months)

Developed a Java Spring based application gateway with complex configuration settings and led authentication flow refactoring. Worked with Azure AD B2C and provided reporting for decision-making.

Java Spring Framework AzureADB2C Reporting Customer Service

Software Developer

Astron IT Ltd.

Sep 2017 - Jul 2019 (1 year 10 months)

Developed customized software solutions for diverse clients and contributed to a positive team environment. Worked with Java Spring, Java Swing, and Node.js based backend systems.

Java Spring Framework Java Swing NodeJS SOAP RabbitMQ Talend

Junior Java Developer

Grepton IT Ltd.

Feb 2016 - Aug 2017 (1 year 6 months)

Assisted in developing and testing Java applications and collaborated with team members to troubleshoot software issues. Documented software designs and technical specifications.

Java Java EE HoloLens 3D Modeling

Education

Degrees, certifications, and relevant coursework

Budapest Business School

Bachelor of Arts, Business Administration

Activities and societies: Actively contributed to the school organisation by holding a middle management position, overseeing projects and facilitating communication between teams and leadership.

Bachelor of Arts in Business Administration. Gained strong understanding of business operations, management, and strategic decision-making.

SCHÖNHERTZ Education Company

Certificate, Java EE Development

Activities and societies: Gained experience in collaborative team-based development. Worked with technologies such as Git, Hibernate, JPQL, JMS and JSF.

Certificate in Java EE Development. Participated in a six-month bootcamp focused on Java EE development.

Eötvös Loránd University

Bachelor of Science, Geography

Activities and societies: Developed the ability to think from social, economic, and geographical perspectives. Participated in challenging field expeditions or hiking journeys.

Bachelor of Science in Geography. Learned the basics of statistics and data analysis for geographical research.