Freelancer profile translated to English.

Description

For over 10 years, I have been involved in the development of modern software based on Java. My focus is on developing cloud-native solutions with Java and the Spring Framework. Development of the central customer account component as a fault-tolerant REST service in an AWS Cloud. Programming the components, agreeing on interfaces, and initial interface testing based on CDCs, acting as a technical contact for business analysts/product owners, and representing the team in the architecture working group are among my responsibilities. Through my experience as a Java tutor, I have already gained valuable experience in team coaching. I am patient, communicative, and can quickly familiarize myself with new subject areas and am able to bring new insights about current frameworks and development trends into a team.

Knowledge:

Java Standard Edition (JSE), Java 8, Java 11, Java 13

Java Enterprise Edition (J2EE, JEE)

Web Services (JAX-WS)

RESTful, SOAP

Java Message Service (JMS), ActiveMQ

Java Persistence API (JPA)

Hibernate ORM (SQL Mapper)

Hibernate OGM (NoSQL Mapper)

Cloud Native Java

Java Trainer

Spring Framework

Spring Boot

Spring MVC

Spring Security

Spring Data

Spring Cloud Contracts/CDCs

Basic Knowledge:

Cloud Computing

Amazon Web Services (AWS)

Kubernetes, Docker

Microservices, SOA

Domain Driven Design

Software Architecture

SQL: Oracle SQL, SQLDeveloper

NoSQL: MongoDB, Redis

Liquibase

UML, Enterprise Architect

Apache Maven, Apache Tomcat

Junit, EasyMock, Mockito, Arquillian

BDD Test Procedures and the Cucumber Framework

Git, TFS

HTML, JavaScript, CSS

DevOps, Jenkins

Mapstruct

Hibernate Validator

Swagger

IDM, Keycloak, JSON Web Token (JWT)

Clean Code, Code Review

Sonar (SonarQube)

OWASP

Eclipse

Confluence, Jira

Java Swing

Requirements Specification, Functional Specification

Agile Manifesto: SAFe, Scrum

Certifications:

Oracle Certified Associate, Java SE 8

Certified Tester

Professional Scrum Master

Languages

German
Native or bilingual
English
Basic

Workplace preferences

Can work on-site

Frankfurt am Main (up to 50km), Frankfurt am Main (up to 30km), Hamburg (up to 15km)

Deutsche Bahn
IT Consultant / Java Software Developer
TRANSPORTATION
July 2018 - Today (7 years and 11 months)
Frankfurt am Main, Germany
Development of the central customer account component of the new sales platform of Deutsche Bahn as a fault-tolerant REST service in an AWS Cloud. Programming the components, agreeing on interfaces, and initial interface testing based on CDCs, acting as a technical contact for business analysts/product owners, and representing the team in the architecture working group are among my responsibilities here.
Java Java EE Web Services Spring Framework RESTful JUnit Mockito
Commerzbank
IT Consultant / Java Software Developer
BANKING AND INSURANCE
September 2017 - June 2018 (10 months)
Frankfurt am Main, Germany
Development of a platform for current account opening. Development of the business logic based on the SOA architecture with SOAP and RESTful. Coordination, alignment, and mediation of the business logic with Indian colleagues/developers.
Java Java EE Spring Framework Web Services SOAP RESTful JPA Hibernate SQL EasyMock JUnit Scrum
LBA
IT Consultant / Java Software Developer
AVIATION AND AEROSPACE
April 2016 - June 2017 (1 year and 3 months)
Hamburg
Further development of existing application for managing flight licenses and flight permits. Conception and creation of a functional specification for the customer. Extension of the existing domain model with new requirements. Development of new components/services based on SOAP and Enterprise Java Beans (EJB).
Java Hibernate SOAP EJBs