Senior Software Engineer

1/2021 – 6/2023

Software architecture, development

# Project for a DIY store
- Worked on an ERP system project
- Implemented requirements and bugfixes on an existing ERP system
- The ERP system based on a proprietary framework (TREND-Framework), which was used to extend and create GUIs, implement the business logic and test it

# Project for a food-retailer/discounter
- Worked on a checkout/till and related backoffice system
- Implemented requirements and bugfixes on an existing codebase based on a proprietary framework (TREND-Framework) and tools
- Main topics were: analyse requirements and bugs, extend and design till process workflows, extend and design reports, extend and design REST and SOAP interfaces for data import/export, code refactoring, define and write integration and unit tests, documentation, release preparation
- Worked on a Python script for documentation export from proprietary documentation system (TREND/Analyst) to Atlassian-Confluence
- Supported developer and test colleagues
- Participated in code reviews
- Main used technics: Java, proprietary framework (MDA, workflow, persistence, communication, GUI), Maven, Jenkins, PostgreSQL, H2 Database, Git, Eclipse with proprietary framework related plugins, proprietary framework for integration tests (Integrity), proprietary reporting engine, OpenAPI plugin for contract first interface definition, WildFly Application Server

Apache Maven, Eclipse, Git, Java-Frameworks, Java (allg.), Wildfly, Jenkins, Jira, Junit, Postgresql, Python, Representational State Transfer (REST), SOAP, SQL

11/2019 – 12/2020

Software architecture, development
- Worked on the DAC 6 project (DAC 6: EU tax disclosure rules)
- Designed and implemented an Application based on Spring Batch Jobs to process tax arrangement data
- Main topics were: technical sub-system design and documentation, generate large XML files (up to 100 MB) with JAXB, implement Oracle PL/SQL Procedures, Reporting SQL Views, different types of tests (Unit-Test; Integration-Tests; System-Tests; Stress-Tests)
- Developed a WebApplication GUI with JSF/PrimeFaces with strict accessibility requirements especially for blind users
- Define JUnit and Selenium Web-GUI tests
- Prepare Jenkins jobs
- Supported developer colleagues
- Supported test team
- Participated in code reviews

Apache Maven, CSS (Cascading Style Sheet), Eclipse, Git, Java Architecture for XML Binding (JAXB), JavaScript, Jenkins, Javaserver Faces, PL/SQL, Spring Framework, SQL, XHTML (Extensible HyperText Markup Language), XML, XSD (XML Schema Definition)

3/2019 – 9/2019

- Implemented a GUI for a telecommunication carrier incident
management system with PHP Symfony-Webframework and
JavaScript
- Supported the backend team on Spring Boot microservices
development
- Designed an external order interface architektur
- Implemented a GUI for a product configuration system with PHP
Symfony-Webframework and JavaScript

Java Database Connectivity, SQL, Apache Tomcat, Hibernate (Java), Java (allg.), Java-Frameworks, Jenkins, Jira, Junit, Spring Framework, Java Message Service, PHP, Representational State Transfer (REST), Symfony, Vue.Js