J2EE – Carsten Spräner https://www.spraener.de Innovationen für Ihren Erfolg Tue, 12 Dec 2023 11:02:58 +0000 de hourly 1 https://wordpress.org/?v=6.9.4 https://www.spraener.de/wp-content/uploads/2023/12/CS-Icon-gruen.png J2EE – Carsten Spräner https://www.spraener.de 32 32 04/2022 – 10/2023: Department of Justice https://www.spraener.de/2023/10/31/04-2022-10-2023-department-of-justice/ Tue, 31 Oct 2023 18:04:40 +0000 https://www.spraener.de/?p=2632 Implementing the backend of a lawsuit management software. The German Department of Justice initiated the project and aims to implement nationwide software to manage lawsuits. My task was to design, implement, and test the backend part of this system. Details Activities Design and developing µService endpoints with Spring Boot in consultation with the frontend team. […]

Der Beitrag 04/2022 – 10/2023: Department of Justice erschien zuerst auf Carsten Spräner.

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Implementing the backend of a lawsuit management software.

The German Department of Justice initiated the project and aims to implement nationwide software to manage lawsuits. My task was to design, implement, and test the backend part of this system.

Details

  • Developing with IntelliJ and Java-17
  • API-Specification with openAPI and implement the backend with Spring Boot
  • Running with Spring Boot
  • Organized with Jira and GitHub
  • Build with maven and Jenkins pipeline  

Activities

Design and developing µService endpoints with Spring Boot in consultation with the frontend team. Test the endpoints with JUnit to get a test coverage above 90%. Describing backend integration tests with IntelliJ HTTP-component.

IT-Technologies

µServices, Spring Boot 2, Java 17, Groovy, Docker, Docker-Compose, Swagger, Lombok, MapStruct, JBoss, J2EE, MySQL/MariaDB, JUnit, Mockito, maven, GIT, Lucene 3.8 / 9.2.0, IntelliJ, Eclipse, Jira, Confluence, GitLab, Jenkins, RedMine

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 04/2022 – 10/2023: Department of Justice erschien zuerst auf Carsten Spräner.

]]> 10/2014 – 02/2022: E-Commerce https://www.spraener.de/2022/02/28/backend-application_ebay/ Mon, 28 Feb 2022 12:28:00 +0000 http://www.spraener.de/?p=328 Backend-Application for eBay-Dealers (Book market). The project creates and maintains a platform for eBay dealers. It simplifies the creation of new offers and tracks the stock with the offers on eBay. It integrates data from eBay, book databases, and distributors. The system was built with Vaadin on a GlassFish container. Later, it was migrated to […]

Der Beitrag 10/2014 – 02/2022: E-Commerce erschien zuerst auf Carsten Spräner.

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Backend-Application for eBay-Dealers (Book market).

The project creates and maintains a platform for eBay dealers. It simplifies the creation of new offers and tracks the stock with the offers on eBay. It integrates data from eBay, book databases, and distributors.

The system was built with Vaadin on a GlassFish container. Later, it was migrated to Spring 2 with microservices running in docker containers.

The project uses SCRUM Methods like backlog, sprints, and DevOps.

Details

  • Importing stock data from the distributor
  • Generating HTML pages and images for the eBay offer
  • Template-driven creation and activation of offers on the eBay platform
  • Reading orders from eBay and synchronizing the stock and affected offers
  • Creating invoices and customer emails
  • Implementing business processes with BPMN (Camunda)

Activities

Create the architecture, Design the application, Maintaining the SCRUM-Backlogs, implementing requirements in a SCRUM-Sprint, Operating and maintaining the application.

IT-Technologies

Vaadin 7, Angular 4+, Java, REST (Jersey), eBay-API (Java), Camunda, Chrome-Extension-API, J2EE-7, Linux OS (SuSE), Jenkins, Gradle, MagicDraw, Docker, Docker-Compose, GIT

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 10/2014 – 02/2022: E-Commerce erschien zuerst auf Carsten Spräner.

]]> 07/2016 – 12/2017: Insurance https://www.spraener.de/2017/12/31/rest-full-angular-architecture/ Sun, 31 Dec 2017 12:52:00 +0000 http://www.spraener.de/?p=334 A REST-Full Angular architecture for insurance calculators. The project creates a new base technology for building insurance calculators with Angular 4 (TypeScript). Communication with the backend via REST-Calls. The system offers highly interactive frontends that validate every calculator field after any value change. The frontend is free of business rules, stateless, highly scalable, and follows […]

Der Beitrag 07/2016 – 12/2017: Insurance erschien zuerst auf Carsten Spräner.

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A REST-Full Angular architecture for insurance calculators.

The project creates a new base technology for building insurance calculators with Angular 4 (TypeScript). Communication with the backend via REST-Calls.

The system offers highly interactive frontends that validate every calculator field after any value change. The frontend is free of business rules, stateless, highly scalable, and follows the REST paradigm.

Details

  • Dialogs as Resources (Dialog-ID, Step-ID)
  • URLs could be given to a third person (support, colleagues)
  • Highly scalable application
  • Micro-Services

Activities

Designing and proofing sustainable architecture.

IT-Technologies

Angular 4+, J2EE 7, Java 8, npm, Angluar-CLI

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 07/2016 – 12/2017: Insurance erschien zuerst auf Carsten Spräner.

]]> 04/2014 – 12/2016: Insurance https://www.spraener.de/2016/12/31/combined-calculator/ Sat, 31 Dec 2016 12:58:00 +0000 http://www.spraener.de/?p=341 Combined calculator for life insurance. The customer wanted a calculator for several products in the life insurance domain. The calculator must integrate several systems and present them as one new product. Thus, all contracts can be sold as one product. Details Activities Responsible for the architecture, leading the development team, and optimization of time-critical processes. […]

Der Beitrag 04/2014 – 12/2016: Insurance erschien zuerst auf Carsten Spräner.

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Combined calculator for life insurance.

The customer wanted a calculator for several products in the life insurance domain. The calculator must integrate several systems and present them as one new product. Thus, all contracts can be sold as one product.

Details

  • Designing a flexible architecture
  • Integrating external providers via web services
  • Integrating a product model (VP/MS)
  • Database persistence
  • Introducing new developers to maintain the system

Activities

Responsible for the architecture, leading the development team, and optimization of time-critical processes.

IT-Technologies

Java 8, Spring-Boot 3, JPA 2.0, UML2, Webservices (JAXB), J2EE 6, Parallel Computing

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 04/2014 – 12/2016: Insurance erschien zuerst auf Carsten Spräner.

]]> 03/2006 – 07/2015: Insurance https://www.spraener.de/2015/07/31/massive-model-driven-development/ Fri, 31 Jul 2015 12:03:44 +0000 http://www.spraener.de/?p=345 Massive model-driven development of a claim settlement application. The customer needs a new application for claims settlement. The application must run in a multi-channel environment (HTML and swing frontend). Therefore, a massive model-driven development was chosen to implement the application. Details Activities Lead developer/team leader, architecture/design, concepts, implementation, and tests. IT-Technologies UML2, MagicDraw, Java 1.7, […]

Der Beitrag 03/2006 – 07/2015: Insurance erschien zuerst auf Carsten Spräner.

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Massive model-driven development of a claim settlement application.

The customer needs a new application for claims settlement. The application must run in a multi-channel environment (HTML and swing frontend). Therefore, a massive model-driven development was chosen to implement the application.

Details

  • Design a sustainable architecture based on the business requirements
  • Building a massive model-driven development process
  • Building Generators and expressive UML-Models
  • Implementation and operation of the application
  • Introducing new employees
  • Implementing business and law requirements
  • Supporting operation and maintaining the application

Activities

Lead developer/team leader, architecture/design, concepts, implementation, and tests.

IT-Technologies

UML2, MagicDraw, Java 1.7, Swing, J2EE, JPA 2, cgv19 Generator (own development), Spring 3.5

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 03/2006 – 07/2015: Insurance erschien zuerst auf Carsten Spräner.

]]> 03/2006 – 07/2009: Insurance https://www.spraener.de/2009/07/31/further-development-external-sales-system/ Fri, 31 Jul 2009 12:11:16 +0000 http://www.spraener.de/?p=349 Further development of an external sales system for the business offices of an insurance company. The system includes all business transactions of an insurance agency, especially creating offers and contracts. Details Activities Architecture consulting, implementation, and tests. IT-Technologies Ant, CVS, DB2, Eclipse, HTML, J2EE, Java, JavaScript, JDBC, JUnit, Camunda, NetBeans, Chrome-Extension-API, OJB, OOD, OR-Mapping, OS/2, […]

Der Beitrag 03/2006 – 07/2009: Insurance erschien zuerst auf Carsten Spräner.

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Further development of an external sales system for the business offices of an insurance company.

The system includes all business transactions of an insurance agency, especially creating offers and contracts.

Details

  • Developing a J2EE-Framework to integrate into the legacy system
  • Enabling automatic tests for all aspects of the application. (business rules, calculations, validations, and persistence)
  • Support of notebooks, especially a stand-alone operating mode. (Swing-UI).
  • Supporting operations on a WebSphere application server
  • Supporting different database systems and integrating a calculation and validation framework (VP/MS)
  • New design of application development with concern for a short time-to-market

Activities

Architecture consulting, implementation, and tests.

IT-Technologies

Ant, CVS, DB2, Eclipse, HTML, J2EE, Java, JavaScript, JDBC, JUnit, Camunda, NetBeans, Chrome-Extension-API, OJB, OOD, OR-Mapping, OS/2, MySQL, Test automatization, Tomcat, UML, VisualAge for Java, VP/MS, XML, XML4J, XSL

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 03/2006 – 07/2009: Insurance erschien zuerst auf Carsten Spräner.

]]> 01/2002 – 07/2005: Insurance https://www.spraener.de/2005/07/31/sales-system/ Sun, 31 Jul 2005 12:27:00 +0000 http://www.spraener.de/?p=362 Sales system for the agencies of an insurance company. The system includes all business transactions required by an insurance company agency. The project was focused on the reimplementation of the creation of offers and contracts. These transactions need to be integrated into the legacy system. Details Activities Consulting in architecture, implementation, and tests. IT-Technologies Ant, […]

Der Beitrag 01/2002 – 07/2005: Insurance erschien zuerst auf Carsten Spräner.

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Sales system for the agencies of an insurance company.

The system includes all business transactions required by an insurance company agency. The project was focused on the reimplementation of the creation of offers and contracts. These transactions need to be integrated into the legacy system.

Details

  • Creating a J2EE-Framework to replace the old offer and contract system
  • Automatic testing of the application to deliver high-quality software.
  • Supporting stand-alone operation mode for Laptops.
  • Supporting operating on a J2EE Container platform (WebSphere)
  • Supporting different database systems for offline and online operation – Integrating a validation and calculation framework (VP/MS)
  • Redesign the development process to get a very short Time-To-Market

Activities

Consulting in architecture, implementation, and tests.

IT-Technologies

Ant, ANTLR, C, CVS, DB2, HTML, J2EE, Java, JavaScript, JDBC, JUnit, MDA, NetBeans, OJB, OOA, OOD, OR-Mapping, OS/2, SQL, Swing, Test automation, UML, VisualAge for Java, VP/MS, WebSphere Application Server, XML, XSL

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 01/2002 – 07/2005: Insurance erschien zuerst auf Carsten Spräner.

]]> 01/2001 – 01/2002: Financial Services https://www.spraener.de/2002/01/31/information-system/ Thu, 31 Jan 2002 13:30:00 +0000 http://www.spraener.de/?p=365 Information system for internal communication. Using state-of-the-art internet technology to create a new communication platform. Details Activities OO-analyses, OO-design, implementation, and test. IT-Technologies ANTLR, J2EE, Java, JDBC, MDA, MySQL, NetBeans, OOA, OOD, PHP, Poseidon for UML, Synformation, TeX, XML,UML, Xalan, XSL, yacc

Der Beitrag 01/2001 – 01/2002: Financial Services erschien zuerst auf Carsten Spräner.

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Information system for internal communication.

Using state-of-the-art internet technology to create a new communication platform.

Details

  • Analyze, design, and implementation of the base architecture
  • High scalable and failover save authorization system
  • Developing generators for MDD
  • Implementing the JDBC-Layer
  • Integration in Synformation Content Management System

Activities

OO-analyses, OO-design, implementation, and test.

IT-Technologies

ANTLR, J2EE, Java, JDBC, MDA, MySQL, NetBeans, OOA, OOD, PHP, Poseidon for UML, Synformation, TeX, XML,UML, Xalan, XSL, yacc

Let’s Talk About Your Project

Just send me a message!

Contact Me

Der Beitrag 01/2001 – 01/2002: Financial Services erschien zuerst auf Carsten Spräner.

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