Senior Java Developer / Database Developer

12/2021 – 7/2022

Conceptualized and implemented a master data application for processing contracts and purchasing conditions in a GCP cloud environment.

Challenges and Solutions:
- Challenge: Integrating multiple systems and ensuring data consistency.
- Solution: Developed a single point of truth API and refactored interfaces to REST endpoints.

Postgresql, Docker, Git, Gradle, Kotlin, Typescript, Google Cloud, Kubernetes

5/2021 – 12/2021

Enhanced global backend microservices for the My BMW App, optimizing service mesh architecture in AWS.

Challenges and Solutions:
- Challenge: Improving the scalability and efficiency of backend services.
- Solution: Developed and implemented technical concepts, optimized the service mesh architecture, and conducted deployments in EMEA, US, and China.

Postgresql, Java (allg.), Jenkins, Amazon Web Services (AWS), Kubernetes

2/2021 – 5/2021

Developed and implemented a master data integration for a CRM system (Aurea CRM) and SAP.

Challenges and Solutions:
- Challenge: Ensuring data consistency and synchronization between CRM and SAP systems.
- Solution: Built a change-data-capture logic and implemented bidirectional data synchronization using Talend.

Enterprise Service Bus, Apache Maven, Subversion, Git, Java (allg.), Jenkins, PL/SQL, XML, XSLT (XSL Transformation)

4/2020 – 5/2021

Developed integration for master and transactional data during SAP implementation, integrating an existing ERP system (Adabas) into SAP.

Challenges and Solutions:
- Challenge: Maintaining data integrity and seamless integration with SAP.
- Solution: Developed a REST interface and implemented change-data-capture logic.

Adabas, SQL, Teradata Sql, Oracle Application Express, Enterprise Service Bus, Apache Maven, Subversion, Git, Java (allg.), Jenkins, PL/SQL, XSLT (XSL Transformation)

1/2020 – 3/2020

Developed a public government interface for biometric verification, integrating existing processes and orchestrations.

Challenges and Solutions:
- Challenge: Ensuring secure and efficient biometric data processing.
- Solution: Developed a web-based interface and defined generic data models for the public API.

Git, Java (allg.), Oracle Application Express, Oracle Database, Spring Framework, SQL, XML, XSD (XML Schema Definition), XSLT (XSL Transformation)

1/2020 – 3/2020

Developed a serverless microservice for market search on edeka.de and managed build and deployment pipelines in AWS.

Challenges and Solutions:
- Challenge: Designing a scalable and efficient serverless solution.
- Solution: Implemented AWS Lambda and integrated the solution into the existing microservice landscape.

Postgresql, Typescript, Amazon Web Services (AWS)

12/2018 – 12/2019

Refactored and optimized a multi-layered application for processing biometric data and providing state documents.

Challenges and Solutions:
- Challenge: Enhancing performance and scalability of a critical application.
- Solution: Refactored the system and implemented technical measures to increase throughput.

Oracle Database, SQL, Oracle Application Express, Bash Shell, Git, Java (allg.), PL/SQL, Spring Framework, SQL*Plus, XML, XSD (XML Schema Definition)

11/2018 – 11/2018

Developed ETL processes for a Data Lake (DWH) for unified company-wide reporting.

Challenges and Solutions:
- Challenge: Integrating various data sources into a unified reporting system.
- Solution: Implemented ETL processes and a change-data-capture mechanism.

Big Data, Oracle Database, Enterprise Service Bus, PL/SQL, Google Cloud, Amazon Web Services (AWS)