György Kelemen - Senior Software Developer, Delivery Unit Software Design & Development

Q: Where is György based?

György is based in Munich, Germany .

Q: What languages does György speak?

György speaks the following languages: German (Native), Hungarian (Native), English (Advanced), Russian (Advanced) .

Q: How many years of experience does György have?

György has at least 18 years of experience. During this time, György has worked in at least 1 role and for 1 company . The average length of individual experience is 2 years . Note that György may not have shared all experience and actually has more experience.

Q: What is György's latest experience?

György's most recent position is Senior Fullstack Developer at Rockstardevelopers GmbH .

Q: What companies has György worked for in recent years?

In recent years, György has worked for Rockstardevelopers GmbH .

Q: Which industries is György most experienced in?

György is most experienced in industries like Information Technology (IT) , Automotive , and Government and Public Administration . György also has some experience in Banking and Finance and Manufacturing .

Q: Which business areas is György most experienced in?

György is most experienced in business areas like Information Technology (IT) , Product Development , and Finance . György also has some experience in Quality Assurance (QA) , Project Management , and Accounting .

Q: Which industries has György worked in recently?

György has recently worked in industries like Automotive , Information Technology (IT) , and Banking and Finance .

Q: Which business areas has György worked in recently?

György has recently worked in business areas like Information Technology (IT) , Product Development , and Quality Assurance (QA) .

Recommended expert

Munich, Germany

Experience

Aug 2025 - Dec 2025

5 months

Senior Fullstack Developer

Rockstardevelopers GmbH

Development of a test system
Establishment of the architecture using Scala/Java for the backend and Swing for the frontend
Setup of CI/CD pipelines with Jenkins for continuous integration, including automated builds
Participation in the Scrum team, including daily stand-ups, sprint planning, and retrospectives
Technology environment: Scala, Swing, EJB, JPA, Scrum, PostgreSQL, Mercurial

Feb 2019 - Jul 2022

3 years 6 months

Senior Fullstack Developer

Rockstardevelopers GmbH

Development of a modular administration and management platform for vehicle inventories and financial data worldwide
Creation of a micro-frontend architecture with React and TypeScript using React Hooks for state management
Development of UI libraries with React Material UI and documentation of components in Confluence
Backend development with Node.js
Setup of data persistence with Knex and PostgreSQL to ensure consistent data storage
Development of REST APIs for seamless communication between frontend modules and the scalable backend
Implementation of SSO integration with MFA/YubiKey for secure single sign-on access
Deployment of frontend and backend to AWS
CI/CD pipelines with Terraform for continuous integration and automated delivery
Test Driven Development (TDD) with Jest for robust unit and end-to-end tests
Work in a Scrum team, including daily stand-ups, sprint planning, and retrospectives
Application development and maintenance with a focus on maintainability and extensibility of the platform
Technology environment: React, TypeScript, React Material UI, Node.js, REST APIs, MFA/YubiKey, SSO integration, AWS, CI/CD pipelines, Jest, TDD, Scrum, application development and maintenance

Jan 2019 - Oct 2022

3 years 10 months

Senior Fullstack Developer

Rockstardevelopers GmbH

Development of a distributed micro-frontend platform for the management and qualification of car components with React-based frontends and Node.js backend services on AWS
Building a micro-frontend architecture with React and TypeScript, using React Router for routing and React Hooks for state management
Development of UI libraries with Styled Components
Creation of the backend with Node.js using REST APIs and GraphQL modules as well as Knex, Oracle, PostgreSQL, and MongoDB
Configuration of CI/CD pipelines with GitHub Actions, including automated builds and tests with Jest as part of Test Driven Development (TDD)
Deployment on AWS and support for application development and maintenance
Integration of MFA/YubiKey for SSO integration for secure authentication
Working in a Scrum team with daily stand-ups, sprint planning, and retrospectives
Validation of forms and user interactions with Ant Design and additional end-to-end tests
Technology environment: React, AgGrid, Ant Design, TypeScript, UI/UX design, Node.js, Knex, PostgreSQL, Oracle, MongoDB, REST, GraphQL, DevOps, AWS, Security, Agile, Testing

Jan 2019 - Dec 2019

1 year

Senior Fullstack Developer

Rockstardevelopers GmbH

Development of a platform for managing orders, financial data, and billing for Sulzer GmbH
Building an architecture with Grails for the frontend and Groovy/Hibernate for the backend
Creation of comprehensive system communication
Setup of CI/CD pipelines with GitHub Actions for continuous integration and efficient build processes
Deploying the application in Docker containers
Establishing effective state management using Redux and Formik in React micro-frontends
Working in a Scrum team, including daily stand-ups, sprint planning, and retrospectives
Ensuring application development and maintenance throughout the entire lifecycle
Technology environment: Grails, Groovy, Hibernate, GitHub Actions, Docker, Scrum, application development and maintenance, Tomcat, IntelliJ

Jan 2018 - Dec 2018

1 year

Senior Fullstack Developer

Rockstardevelopers GmbH

Development of a modular web application for managing screw data with Angular and Java
Design of a modular frontend architecture with Angular and micro-frontends, development of UI libraries
Creation of a backend system in Java with JPA and REST APIs, using dependency injection to establish stable services
Expansion of data persistence with EclipseLink and PostgreSQL
Setup of a CI/CD pipeline with Jenkins and Maven for automated delivery
Test Driven Development (TDD) through unit tests with JUnit and integration tests
Organization of daily stand-ups and sprint planning following agile methods
Documentation in Confluence
Automation of build processes and dependency management with Maven
Technology environment: Angular, Java, JPA, EclipseLink, PostgreSQL, Jenkins, JUnit, Confluence, Agile, Maven, Payara, OpenShift, Subversion

Jan 2016 - Dec 2017

2 years

Senior Fullstack Developer

Rockstardevelopers GmbH

Created an application with a JSP front-end and SAP/R3 back-end using SOAP
Developed a Java application with JSP/HTML and SOAP
Built new front-end modules with JSP/HTML
Integrated SOAP for real-time communication between front-end and back-end
Set up a CI/CD pipeline with Jenkins and Maven for build and deployment automation
Documented work in Confluence
Organized daily stand-ups and sprint planning using agile methods
Optimized dependency management with Maven
Technical environment: Java, JSP, SAP/R3, SOAP, Payara, Jenkins, Maven, Confluence, JavaScript, jQuery, JasperReports, Subversion

Jun 2015 - Apr 2025

9 years 11 months

Senior Fullstack Developer

Rockstardevelopers GmbH

Built a distributed platform as an information system for BMW dealers worldwide
Established the architecture with React and TypeScript and used Struts for dealer management, applying React Hooks for state management
Developed UI libraries with Styled Components for consistent design elements
Provided back-end services with Java/EJB/JPA, Spring Boot, and Node.js to deliver REST APIs for real-time communication
Set up CI/CD pipelines with GitHub Actions for continuous integration, including automated builds
Deployed the application on Kubernetes with Helm Charts for a GitOps-driven rollout
Containerized services with Docker for portable and scalable deployment packages
Used MFA/YubiKey for SSO integration for secure authentication
Contributed in a Scrum team, including daily stand-ups, sprint planning, and retrospectives
Technical environment: React, TypeScript, Struts, EJB, JPA, Spring Boot, Node.js, Knex, JasperReports, Apache POI, GitHub Actions, Docker, Kubernetes, Helm Charts, MFA, YubiKey, Scrum, Oracle, PL/SQL, GitHub

Dec 2013 - Dec 2014

1 year 1 month

Senior Fullstack Developer

Rockstardevelopers GmbH

Developed an application to link working hours to orders for AKDB
Front-end development with JSP/HTML and back-end development with Java/C# and REST API
Data storage on MS SQL Server
Deployed with Maven and Jenkins
Built CI/CD pipelines with Jenkins for continuous integration and automated delivery
Organized daily stand-ups, sprint planning, and retrospectives in a Scrum team
Technical environment: Java, C#, JSP/HTML, REST API, JavaScript, jQuery, MS SQL Server, JBoss/WildFly, Maven, Jenkins, Subversion

Aug 2007 - May 2015

7 years 10 months

Senior Fullstack Developer

Rockstardevelopers GmbH

Created a client/server application to manage requirements and orders for AKDB
Developed front-end modules with JSP/HTML and back-end with Java/JPA/Hibernate
Implemented modules for financial controlling
Set up build processes with Maven and Jenkins for continuous integration
Participated in daily stand-ups, sprint planning, and retrospectives according to Scrum
Developed REST APIs
Technical environment: Java, Hibernate, JPA, C#, JSP, REST API, MS SQL Server, Oracle, MySQL, JBoss, Subversion

Industries Experience

See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.

Experienced in Information Technology (15 years), Automotive (10 years), Government and Administration (8 years), Banking and Finance (3.5 years), and Manufacturing (1 year).

Information Technology

Automotive

Government and Administration

Banking and Finance

Manufacturing

Business Areas Experience

The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.

Experienced in Information Technology (18 years), Product Development (15 years), Finance (8.5 years), Quality Assurance (4 years), Project Management (3 years), and Accounting (1 year).

Information Technology

Product Development

Finance

Quality Assurance

Project Management

Accounting

Summary

Years of hands-on experience as a Senior Fullstack Developer in various projects. Applied micro-frontend architectures multiple times and used React in different settings.

By building UI libraries and well-documented components, high standards are ensured in frontend and backend development. Extensive experience in implementing CI/CD pipelines, containerizing with Docker, and orchestrating clusters with Kubernetes. Agile working methods and skilled use of modern technologies for demanding frontend and backend development projects in data management.

Skills

Development And Implementation Of Information Systems For Dealers
Management And Analysis Of Metrics In The Onegpm System
Management Of Car Parts With Dafisnext
Processing And Control Of Order Management In The Samt System
Management Of Show Data In The Jims System
Creation Of Engine Data Sheets In The Mdb System

Languages

German

Native

Hungarian

Native

English

Advanced

Russian

Advanced

Education

Oct 2005 - Jun 2007

Technical University of Munich

Master · Applied Computer Science · Munich, Germany

Oct 1982 - Jun 1984

Technical University of Darmstadt

Ph.D. in Natural Sciences · Darmstadt, Germany · good

Oct 1973 - Jun 1977

Carl Schorlemmer Technical University of Merseburg

Diploma Chemist · Process Chemistry · Merseburg, Germany · very good

...and 2 more

Profile

Created

March 2026

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Frequently asked questions

Do you have questions? Here you can find further information.

Where is György based?

György is based in Munich, Germany.

What languages does György speak?

György speaks the following languages: German (Native), Hungarian (Native), English (Advanced), Russian (Advanced).

How many years of experience does György have?

György has at least 18 years of experience. During this time, György has worked in at least 1 role and for 1 company. The average length of individual experience is 2 years. Note that György may not have shared all experience and actually has more experience.

What roles would György be best suited for?

Based on recent experience, György would be well-suited for roles such as: Senior Fullstack Developer.

What is György's latest experience?

György's most recent position is Senior Fullstack Developer at Rockstardevelopers GmbH.

What companies has György worked for in recent years?

In recent years, György has worked for Rockstardevelopers GmbH.

Which industries is György most experienced in?

György is most experienced in industries like Information Technology (IT), Automotive, and Government and Public Administration. György also has some experience in Banking and Finance and Manufacturing.

Which business areas is György most experienced in?

György is most experienced in business areas like Information Technology (IT), Product Development, and Finance. György also has some experience in Quality Assurance (QA), Project Management, and Accounting.

Which industries has György worked in recently?

György has recently worked in industries like Automotive, Information Technology (IT), and Banking and Finance.

Which business areas has György worked in recently?

György has recently worked in business areas like Information Technology (IT), Product Development, and Quality Assurance (QA).

What is György's education?

György holds a Doctorate from Technical University of Darmstadt, a Master in Applied Computer Science from Technical University of Munich and a Master in Process Chemistry from Carl Schorlemmer Technical University of Merseburg.

What is the availability of György?

György will be available full-time from April 2026.

What is the rate of György?

György's rate depends on the specific project requirements. Please use the Meet button on the profile to schedule a meeting and discuss the details.