Full Stack and AWS Developer

1/2022 – 5/2026

- Frontend Modernization: Participated in a JavaScript→ TypeScript migration (~70k LOC), introducing a scalable testing strategy with Jest and improving maintainability and defect detection.

- Spring Boot Microservice Maintenance: Contributed to testing, refactoring, and maintenance of a Spring Boot microservice ecosystem, improving reliability and code quality.

- Document Rendering Engine: Contributed to the build of a high performance document rendering and layout engine using custom XML markup for PDF/DOCX generation in ASP.NET Core.

- Zero Knowledge Encryption — Implemented Zero Knowledge Encryption for DSGVO compliance using Java’s BouncyCastle primitives (AES GCM, AES KW, Argon2, HKDF).

- AWS Deployment: Supported deployment workflows on AWS ECS, ensuring secure and consistent release processes.

- CI/CD Architecture: Designed and implemented a CI/CD strategy using Jenkins Multibranch pipelines, SonarQube Quality Gates, and automated ECR/ECS deployments for backend microservices and frontend.

Amazon Web Services (AWS), ASP.NET, Continuous Integration, Docker, Hibernate (Java), Java (allg.), JavaScript-Frameworks, Jenkins, Junit, Spring Framework, SSH (Secure Shell), Typescript, Ubuntu

5/2020 – 1/2022

- Backend Development: Developed and maintained Java/Spring and Spring Boot microservices supporting high volume income market data (Bonds, Futures, Indexes, Options, etc.) processing and downstream banking systems.

- Database Architecture: Designed and optimized Oracle database structures, including large business objects spanning 60+ tables and ~1000 fields, ensuring performance and data integrity.

- Scripting & Automation: Automated operational tasks using Groovy and shell scripting on RHEL, improving deployment and maintenance workflows.

- API Integration: Worked with REST APIs and JSON/XSD based schemas to integrate internal and external data sources.

- CI/CD: Used Jenkins for CI/CD pipelines supporting secure and compliant deployments in a regulated banking environment.

Git, Java-Entwickler, Jenkins, Oracle Database, Red Hat Enterprise Linux (RHEL), Representational State Transfer (REST), Spring Framework, SQL, XSD (XML Schema Definition)

9/2018 – 3/2020

- Legacy Modernization: Refactored and stabilized large legacy Java codebases, improving maintainability and reducing defect rates in critical telecom systems.

- Microservice Development: Implemented new Spring/Spring Boot microservices to replace monolithic components and support scalable service expansion.

- API & Service Documentation: Created comprehensive documentation for existing SOAP and REST web services, enabling smoother onboarding and cross team integration.

- SOAP & CXF Integration: Built and maintained SOAP services using Apache CXF, WSDL/XSD schemas, and automated code generation pipelines.

- Testing & QA Automation: Performed service testing with SOAP UI, Groovy scripts, and Postman, ensuring reliability across distributed systems.

- CI/CD & Deployment: Used Jenkins pipelines for automated builds and deployments on Tomcat 6/7 and AWS (EC2, ELB, ECR, S3).

Apache Kafka, Oracle Database, Apache Tomcat, Apache Maven, Java (allg.), Jenkins, Spring Framework, Debian Linux, SOAP, Amazon Web Services (AWS), WSDL (Web Services Description Language), XSD (XML Schema Definition)