Backend/Frontend Developer

A microservice application for aggregating routes.

• Developed backend components with Java/Spring Boot
• Developed test components with mocking frameworks (Mockito)
• Developed integration test components
• Created OpenAPI specification
• Configured CI/CD pipeline
• Designed, extended, and optimized system architectures
• Developed frontend with Angular 18
• Performed code reviews

Java Corretto 21, Spring Boot/Cloud Native 3.3, Git, CI/CD pipeline with GitLab, YAML, JSON, Swagger UI, Postman, Log4J, microservices, Jira, Confluence, PostgreSQL, AWS S3, Docker, Kubernetes, Spring Security, OAuth 2, JWT, SonarQube, Angular 18, RxJS, NGRX Store, PrimeNG, Storybook 4, TypeScript 5.2, Node.js, HTML, SCSS, Grafana, IntelliJ, JFrog, Gradle, logging framework Splunk, Agile Scrum methodology, Vaadin V24

Configured GitLab CI/CD pipeline and Docker/Kubernetes files.

• Created CI/CD pipeline and deployment scripts
• Created Dockerfiles
• Prepared release packages and performed deployments
• Implemented security requirements
• Created Kubernetes manifests
• Created Kubernetes Helm charts
• Conducted code reviews implemented with Java/Spring Boot
• Set up AWS S3, AWS EC2, AWS Lambda, AWS VPC, AWS CloudWatch, AWS CDK, API Gateway

Docker/Docker Compose, Kubernetes/Helm charts, Linux OS, Java Corretto 21, Spring Security 6.0, Spring Boot 3.2, microservices, Git, GitLab CI/CD pipeline, YAML, JSON, AWS S3, AWS EC2, AWS Lambda, AWS VPC, AWS CloudWatch, Git, Jira, Confluence, PostgreSQL, Elasticsearch, Grafana, Prometheus, OpenShift, IntelliJ, JFrog, Maven, Gradle, logging framework Splunk, Agile Scrum methodology, Jira, Confluence, Python scripts for test automation

Development of backend components/frontend + DevOps tasks for an application to calculate offers.

• Development of Java/Spring Boot and Kotlin components
• Development of components for JUnit tests, system/integration tests with Cucumber and mocking frameworks
• Creation of Kubernetes Network Policies to secure the cluster
• Configuring GitLab CI/CD pipelines, creating Docker and Kubernetes configurations and Helm charts, API gateway
• Designing, extending, and optimizing system structures
• Conducting code reviews, enforcing clean code, AWS S3, AWS EC2, AWS EBS, AWS Lambda, AWS VPC, AWS CloudWatch, AWS DynamoDB, AWS CDK

Java 17, REST/Microservices with Spring Boot/Cloud Native 3.2, Kotlin 1.8, AsyncAPI, IBM MQ, OracleDB SQL 19c, MongoDB NoSQL 7.0, OpenID Connect/OAuth 2.0, Apache Kafka 3.5.1/Avro, Git 2.45, GitLab CI/CD, Jira, Gradle, OpenShift 4.11, Ansible 2.13, ArgoCD 2.11.0, Linux shell scripting, Terraform 1.3, IntelliJ, Swagger 5.9.1, OpenAPI 3.1.0, Docker 24.0, Spring Security 6.0, Kubernetes/Helm Charts 1.28, Scrum/SAFe, JPA 3.1 and JPA Criteria API, Hibernate 5.6/Hibernate Envers, Behavior Driven Development (Cucumber 9.0.1), YAML, Tailwind CSS, Postman 10.0, SoapUI, JUnit, Mockito 5.6.0, JSON/Jackson, XML, Graylog 5.2.2, Jenkins 2.426.3, Instana 1.211.0, SonarQube 10.2.0.77647, Confluence, E2E testing/test automation with Cypress 13, Accessibility, Angular 16, RxJS, NGRX store, Bootstrap 4, Storybook 4, TypeScript 5.2, Node.js 19.9.0, HTML, SCSS, React, Playwright, NestJS, Redux.

Further development of frontend and backend components of an existing web application for managing and displaying the O2 product catalogs.

• Data processing concepts, UX design
• Development of frontend and backend components in the O2 shop area to manage hardware display and improve product presentation
• Development of components for JUnit tests, integration tests, system tests with Cucumber and mocking frameworks
• Configuring Git, GitLab CI/CD pipelines, and Kubernetes or Helm charts
• Working with AWS S3, AWS EC2, AWS Lambda, AWS VPC, AWS EKS, AWS CloudWatch, AWS DynamoDB; conducting code reviews, clean code and release management; AWS CDK; API gateway

Spring Boot/Cloud Native, Spring Framework 5, Java 14, Nexus, Nexus IQ, Quarkus 3.2, Reactive programming with Spring WebFlux, REST, REST/Microservices with Kotlin 1.7, Jira, OAuth 2.0, GraphQL, Oracle databases and SQL, NoSQL databases (MongoDB), Keycloak, GWT, GitLab CI/CD pipeline, Apache Kafka, Bitbucket, Docker, Kubernetes/Helm, AWS, Harpoon OpenAPI, Swagger, EasyMock, Scrum, SAFe, IntelliJ, Maven, Git, Jira, Confluence, PrimeNG, Jasper Reports, Camunda BPMN, Cassandra, JPA and JPA Criteria API, Hibernate/Hibernate Envers, EclipseLink, JUnit, Mockito, CheckStyle, FindBugs, MapStruct, AsyncAPI, IBM MQ, Grafana, Prometheus, Jenkins, Kibana, SonarQube, Vue.js, CI/CD pipelines, MySQL, Ansible, ArgoCD, Linux shell scripting, Terraform, TypeScript, Node.js, JSON/Jackson, XML, React, Playwright, NestJS, Storybook, JavaScript, YAML, CMS/Commercetools.

Development of frontend components of an online application to process personal customer data.

• Development of frontend components for a new application allowing customers to authenticate and process their personal data, UX design
• Creating virtual machines in Azure
• Working with Azure SQL
• Development of components for JUnit tests, integration tests, system tests, Mockito
• Code reviews, Docker, Kubernetes/Helm charts

Angular 10, Grafana, Prometheus, Swagger, OAuth 2 (Open Authorization), IntelliJ, Git, GitLab CI/CD, Postman, Bitbucket, OpenShift, Confluence, YAML, Angular Material, RxJS, NGRX, Node.js, TypeScript, Jasmine, Karma, Protractor, Git, Jira, Microsoft Azure, PrimeNG, Scrum/SAFe, Maven, Jenkins, SonarQube, Keycloak, GWT, Storybook, Nexus, Nexus IQ.

Further development of the backend/frontend components of an existing application that calculates private pensions based on specific criteria.

• Requirement analysis
• Development of backend/frontend components of an existing application to calculate private pensions according to defined criteria
• Conducting code reviews, clean code practices, JSON/Jackson, XML, testing with mocking frameworks like Mockito, GWT
• Designing, further developing, and optimizing system architectures
• Configuring GitLab CI/CD pipelines, creating Kubernetes/Helm chart configurations
• Working with AWS services such as AWS S3, AWS EC2, AWS Lambda, AWS DynamoDB, AWS CloudWatch

Java 11, REST/microservices with Spring Boot, Spring Framework, web services with REST API, SOAP/WSDL, AWS, Kubernetes/Helm, JUnit tests, Mockito, Postman, JPA/Hibernate/Hibernate Envers, Jira, PostgreSQL, Elasticsearch, Jenkins, Ansible, ArgoCD, Linux shell scripting, Terraform, Swagger, MongoDB, Artifactory, Eclipse, DevOps, CI/CD, Confluence, JSON/Jackson, JWT (JSON Web Token), YAML, Postman, SoapUI, clean code, Git, GitHub, Jira, Confluence, Kibana, Scrum, SAFe, Maven, Jenkins, Grafana, Prometheus, test-driven development (TDD), clean code, pair programming, OpenAPI, CheckStyle, Keycloak, GWT, Angular 8, Angular Material, RxJS, NGRX, TypeScript, Jasmine, Karma, Protractor, npm, CSS, HTML, Node.js

Creating the architecture and developing backend components of a new web application for managing public information.

• Creating IT concepts
• Architecture and development of backend and business logic components with JPA 2/Hibernate, EJB 3.1, JAX-RS, JSON, XML
• Developing frontend components with Angular 5.0
• Requirements analysis, code reviews, clean code, mocking frameworks

REST web services with JAX-RS, Jersey, REST web services with Eclipse MicroProfile, Java 8, Jakarta JEE 7, EJB 3.1, CDI, legacy code, Angular 5, JSON, Node.js, Mockito, testing with Jasmine, Karma, Protractor, TypeScript, Angular CLI, npm, Enterprise Architect, JavaScript, HTML5, CSS, Sonar, Artifactory, Jenkins, CI/CD, WebLogic Server 10.3.6.0, Oracle 11.2.0.3.0, SQL, Liquibase, Postman, SoapUI, Eclipse, Swagger, accessibility, JUnit tests, Mockito, JPA 2.0, Hibernate 3, Swagger, Subversion (SVN), PostgreSQL, Elasticsearch, Eclipse, Swagger, JasperReports, Maven, clean code, pair programming

Development of a backend, business logic, and frontend component of the Panda process to enable offers and fares to be processed according to specific criteria.

• Creation of IT concepts
• Development of the backend and business logic component with JPA 2, EJB 3.1, RESTful Web Services
• Development of frontend components with Primefaces 5.3, JSF 2.1, AngularJS , Angular
• Development of dialogs between the frontend components

Primefaces 5.3, Spring Framework, JSF 2.1, Angular JS, Angular 2.Apache Tomcat, TypeScript, Java Script, CSS, Apache Wicket, Java 8, Jakarta JEE 7, EJB 3.1, CDI, Spring Framework 4, Spring MVC, Spring Boot, Spring Microservices Spring Security, JBoss EAS, Wildfly, Enterprise Architect, InteliJ, SQL, Enterprise Architect, JUnit, JPA 2.0, Hibernate 3, CSS, Jess/JavaScript, JQuery, Bootstrap 3, Less, RESTful Web Services with JAX-RS, Jersey, Jason, Pair-Programming, Codereviews, Clean Code, Maven, Features Branches, Legacy Code, Subversion SVN, Jenkins, Jira, Virtualbox, Agile software development method Kanban

Frontend/Backend: Development of a web application to capture reports from log files / optimization of database query performance.

• Creation of IT concepts
• Implementation of business requirements
• Development of frontend components with Primefaces, JSF, XHTML, AngularJS
• Development of the backend component with JPA 2
• OpenJPA
• Development of the business logic component with EJB 3.1
• Development of RESTful services with JAX-RS, Jersey
• Development of dialogs between the view components

Primefaces 5.1, JSF 2.2, Facelets, XHTML, AngularJS, CSS, CDI, JMS (Java Message Service), Ant, Apache FOP, XSLT, XQuery, Apache Wicket, Jakarta JEE 6, EJB 3.1, JMS, Message Driven Bean, JAX-RS (Java API for RESTful Services), Jersey, JSON, JPA 2, Hibernate, OpenJPA, WAS (WebSphere Application Server 8.0)/IBM MQ, WebSphere Portalserver 8.0, Eclipse Kapler, JUnit, Selenium, EasyMock, Mockito, HTML5, XHTML, Angular JS, DB2, Derby database, Scrum, IBM Jazz

Frontend/Backend: Development and enhancement of frontend and backend components of an application for checking customers' creditworthiness. The goal of this project was to develop and enhance frontend and backend components of an existing application for processing loan applications.

• Implementation of business requirements
• Development of frontend components with RichFaces, JSF, XHTML
• Development of the backend component with Hibernate, JPA, EJB
• Development of the business logic component with EJB
• Development of dialogs between the view components

RichFaces 3.3, JSF 1.2, Facelets, XHTML, HTML5, JQuery, CSS, JavaScript, JPA 2, Hibernate, Ant, Apache Tomcat, Jakarta JEE, EJB 3.0, Servlet API, Oracle WebLogic 10.33, Hudson, Log4J, Subversion

Development of JSF portlets for a Liferay portal. The goal of this project is the development of frontend components or portlets for displaying and capturing customer data in the Liferay portal.

• Development of view components with IceFaces, JSF portlets, XHTML
• Development of dialogs between JSF components and portlets
• Development of business logic components with Liferay services
• Creation of technical designs

IceFaces 3.0, AlloyFaces, JEE, JSF 2.0, Facelets, XHTML, Jira, portlets, Liferay, Ajax, jQuery, CSS, JavaScript, Tomcat, Scrum, XPath, Maven, Subversion

Development of a J2EE component in the online shop area. The goal of this project is the development of backend and backend/frontend components for displaying and capturing products in an online shop.

• Development of view components with RichFaces, JSF 2.0, JSP, XHTML
• Development of backend components with Hibernate for integration with the Oracle database
• Development of business logic components with the Spring Framework
• Development of dialogs between JSF components

JEE, RichFaces 3.3, JSF 2, Ajax, jQuery, JSP, Spring DAO, Spring Security, Hibernate, JPA, WSDL, SQL, Eclipse, Tomcat, Subversion (SVN)

GUI / Frontend: Further development of J2EE-based frontend components of a web portal in the insurance industry for processing customer data. The goal of this project is the further development of J2EE-based frontend components of a portal for R+V insurance to allow customer data to be processed from the host.

• Development of view components with Spring, JSF 2.0
• Development of dialogs between JSF components
• Documentation, IT concept

Spring, JSF 1.2, JSP, RichFaces 3.3, JAXB 2, CSS, XSD, XML, PHP, Harvest, Scrum, Siemens EAP (Enterprise Application Portal), JBoss, Eclipse

GUI / Frontend development / development of J2EE-based frontend components for a web portal in the insurance industry to manage customer data. The goal of this project is to develop and further enhance the J2EE-based frontend components of R+V Versicherung's broker portal, so brokers can edit customer data online from a service-oriented architecture.

• Development of view components with Struts 1.2, JSP
• Development of business logic components to connect to the host
• Development of dialogs between view components
• IT concept and documentation

Struts, J2EE, JAXB 2, JiBX: binding XML to Java code, EJB (Stateless Session Bean), JSP, CSS, JUnit, XSD, XML, UML, Harvest, Scrum, UML, EAP (Enterprise Application Portal) from Siemens, JBoss, HTML5, Eclipse