Enrico Gehring

• I designed and developed a Portfolio Webpage to representing myself. • The webpage is programmed in responsive design and using selfprogrammed frameworks for the menu, dynamically loading of templates and JavaScript files. • The resume is loaded from a JSON file. • Redirection to the page: https://first-soft-solutions.com/enricogehring • Used technologies: HTML5, JavaScript, CSS5, PHP and JSON.

• Further development of my Android app Learning Machine • I develop new features programmed in Java and Kotlin • The new program version is deployed on the Google Play Store. • Redirection to landing page: https://first-soft-solutions.com/learningmachine/landingpage/ • Used technologies: Android Studio, Java, Kotlin und SQLite

• Authorship of the technical book Principles of Programming. • The focus of the book is on the KISS principle and the SOLID principles. • The book describes the principles in clear and comprehensible language. It is supported by relevant examples (programmed in Java) that vividly demonstrate how the principles should be applied.

• Revision and redesign of my Android App Learning Machine. • Planning and development of the Android app within Android Studio. • The programming of the Learning Machine App utilized, among other features: Billing API, Text to Speech API, Swiping Effects. • Redirection to landing page: https://first-soft-solutions.com/learningmachine/landingpage/ • Used technologies: Android Studio, Java, Kotlin and SQLite

• A comprehensive web application for internal use was technically planned and developed by me. • Great emphasis was placed by me on the use of programming principles and design patterns (SOLID principles, State Machine, Factory Design). • REST Web services were used for communication with the backend. • Co-creation of the backend, programmed in C#. • Used technologies: Visual Studio Code, Angular 16, HTML5, JavaScript, TypeScript for the Frontend, C# for the Backend and Figma for planning.

• My tasks included the analysis, maintenance, and extension of existing applications in the Front- and Backend. • This includes areas such as data storage for customer information, tax management, as well as new developments within existing applications. • I was responsible for the optimization and creation of complex database queries for massive data sets, with a strong emphasis on speed. • Adherence to programming standards. • Used technologies: Visual Studio, C#, Natural and MSSQL (T-SQL).

• My tasks included the analysis, maintenance, and extension of existing applications in the Front- and Backend. • This includes areas such as data storage for customer information, tax management, as well as new developments within existing applications. • I was responsible for the optimization and creation of complex database queries for massive data sets, with a strong emphasis on speed. • Adherence to programming standards. • Used technologies: Visual Studio, C#, Natural and MSSQL (T-SQL).

• A graphical user interface was designed and integrated to display status relationships. The programming was done in JavaFX. • I was responsible for the analysis of web applications and their extension. • Further adjustments and extensions of web interfaces to the MKS system were made by me. • Used technologies: Java, JavaFX, HTML5, CSS, JavaScript, Restful Webservices and SpringBoot.

• Learning to program Android applications. • I planned, designed, and tested multiple Android applications utilizing internal features such as the SQLite database, shared storage functionality (shared preferences), interface handling, and Bluetooth technology. • Programming of the Android application Learning Machine. • Familiarization with the use of the Google Play Console and Android Studio. • Used technologies: Android Studio, Java, Kotlin and SQLite.

• Close collaboration with the testing teams to optimize the backend systems for improved performance. • I held the role of DevOps and was responsible for the maintenance of the IBM WebSphere Servers. • Maintenance and enhancement of banking and financial software for insurance companies. • Used technologies: Java, HTML5, CSS, JavaScript, Restful Webservices, SpringBoot and IBM WebSphere Server.

• I was responsible for the backend development of new applications intended to be integrated into existing systems • Enhancement of existing systems to maximize performance. • I took on additional responsibilities as a DevOps manager to ensure the successful implementation of critical projects. • Used technologies: Java, JSF, JPA, HTML5, CSS3, JavaScript, SOAP, Restful Webservices, C#, .NET, Oracle, Linux, DevOps, Camunda and WebSphere Server.

• I was responsible for the Front- and Backend of an existing web application for the financial market. • The task involved the optimization of processes and enhancement of the existing software. • Used technologies: Java, Eclipse, HTML5, CSS and JavaScript.

• Flextronics provides a technology for unit hardware testing. • I was responsible for the planning and development of a web-based application to replace an existing Linux console program. • Successful completion and significant improvement in user-friendliness. • Used technologies: UML, HTML5, JavaScript, CSS3, Angular JS, jQuery, NodeJS, Restful, SpringBoot, Eclipse and Bash.

• My responsibilities included the development of an XML-based program for the control of triggers for a management system. • I was responsible for the migration of the MKS system to the IMS system and developed a tool for server data reconciliation. • Used technologies: UML, Java, HTML5, JavaScript, MySQL, Tomcat Server and CSS3.

• I worked in collaboration with the company Unisoft. • The task involved the conceptualization, planning, development, and analysis of the performance of a production system in the automotive industry. • Used technologies: UML, Java, HTML5, JavaScript, MySQL, Tomcat Server and CSS3.

• First Level Support. • Organization and maintenance of the system environment.

• The task involved the development of a configurable web-based management software. • The software includes the following features: user management, an email client, as well as functionalities for adding, reconciling, deleting, and modifying database entries. • Used technologies: HTML5, JavaScript, jQuery, CSS, Java, JSP, Oracle, and Tomcat Server.

• I was responsible for the revision of an existing web application for license plate recognition. • I was responsible for the extension of the web-based control software, enabling retrieval and customization options for large datasets within a distributed system. • Used technologies: HTML5, JavaScript, jQuery, Perl and Apache Server.

• I improved and expanded the existing web application for data exchange by adding bulk upload functionality, thereby enhancing system efficiency and user-friendliness. • Used technologies: HTML5, JavaScript, jQuery, DojoJS, Java, MySQL and Tomcat Server.

• I was responsible for the programming and integration of a Man-Machine Interface for the user-friendly control of a storage machine. • I integrated and programmed a control panel with a 10-inch touchscreen display and a remote interface capable of monitoring and controlling system functions. • I co-developed the development of interfaces for the bidirectional communications. • Used technologies: HTML5, JavaScript, jQuery, PHP, C++, SOAP Webservice, SQL and Apache Server.