Object-Oriented Programming Experts in Stuttgart

• Develop hardware drivers and middleware using C++11, Java and Python
• Design of various RF features such as deembedding based on stakeholder requests
• Work with multiple teams to design drivers for multiple RF products
• Perform HW control to deliver RF signals and measure modulated response
• Develop RF drivers for generation of low noise signals to test WiFi7 products
• Use digital modulation techniques such as QAM for low level driver development
• Develop low level USB drivers for device enumeration
• Develop drivers for HW relay control of control boards for device testing
• Perform JTAG operations on devices under test
• Use network-based protocols (SFTP, UFTP, FTP, SSH) for control board communication
• Manage HW devices such as BADC and EEPROM for control board maintenance
• Utilize C++11/14/17 features, template metaprogramming and STL
• Employ multithreading for testing and control of multiple HW devices
• Develop tools for deployment of customer OS on control boards
• Perform component and integration tests using CxxTest
• Follow Scaled Agile Framework for software development
• Create detailed design documents using PlantUML

• Implementing applications with Kotlin and Ktor as microservices
• Using MongoDB in the MongoDB Atlas cloud
• Asynchronous communication of services via Google Pub/Sub
• Using Kotest and MockK for unit tests
• Developing an administration frontend with TypeScript, React and Express.js
• Provisioning environments in GCP using Terraform
• Implementing CI/CD processes with GitHub Actions
• Operating scalable production and test environments in GCP with Kubernetes, Helm and Flux CD
• Monitoring environments with Prometheus and Grafana
• Providing BI data in the Google BigQuery data warehouse

• Design of a new cloud service
• Requirements Engineering
• API Design (REST API, Kafka)
• Consulting on architecture, feasibility and effort estimation
• Implementation of a microservice architecture
• Implementation of a Spring Boot web service
• Development of REST APIs including business and persistence logic
• Kafka consumers and producers
• Various Excel upload/download scenarios
• Change Data Capture
• Cloud provisioning with IaC/Terraform
• Go-live with 30,000 users
• Operation, support and bug fixing for other services

Environment/tools: GitLab, JIRA, Confluence, IntelliJ, Spring Boot, Java, Docker, Terraform, AWS ECS, Postgres, Apache Kafka, SAP Datasphere, JUnit, Debezium, Apache POI, Hibernate, JPA, Testcontainers

• Development of a microservice application for calculating postings on accounts

• Development of backend components with Java or JEE, Quarkus, Kafka, Rest API

• Development of the test component with mocking frameworks (Mockito)

• Development of integration test components

• Creation of OpenAPI specification format

• Configuration of CI/CD pipeline

• Development of frontend components with React

• Design, further development and optimization of system structures

• Code review

• Java Corretto 21, JEE, Quarkus, Golang

• Reactive programming with Spring WebFlux, Project Reactor

• Git, Azure DevOps for CI/CD pipeline, YAML, Json Swagger UI, Postman, Rest OpenAPI, Kafka Streams, Kafka Connect, Log4J

• Microservices, Jira, Confluence, MySQL, Docker, Kubernetes (deployment via Helm charts)

• Spring Security, OAuth 2, JWT, Sonarqube

• IntelliJ, Maven, logging framework Splunk, Agile method Scrum, Nexus, Vaadin V24, build tool Vite

• React, React.JS, Node.js, Jess/JavaScript, Tailwind CSS, Agile method Scrum, accessibility BITV, Playwright

• Lead consultant focusing on EWM, WM, MM, LE, SD, TM in an S/4HANA system

• Design, implementation and rollout of a new S/4HANA logistics system as part of the OneLog project for battery management across multiple plants

• Industry: Automotive

• Overall responsibility for contributing to the design, realization and successful deployment of an SAP S/4HANA logistics system

• Managing and coordinating rollouts in the roles of EWM Manager, Rollout Manager, and project and subproject lead

• Providing strategic advice to clients on logistics processes, system architecture and best-practice approaches

• Responsible for creating, aligning and quality-assuring IT specifications for technical enhancements

• Leading customizing activities to optimally map complex business processes

• Planning, managing and executing system, integration, functional and regression tests to ensure a stable production environment

• Overall responsibility for cut-over, go-live and hypercare phases including data migration from SAP WM to SAP EWM

• Planning, organizing and conducting user training sessions and on-site support to ensure sustainable system adoption

• Designing and implementing a prototype for a shuttle solution in SAP S/4HANA Manufacturing Logistics integrating SAP TM and SAP EWM

• Designs and develops new high-precision analog/digital PCBs for laser control systems using Eagle and KiCad.
• Leads hardware testing, failure analysis, and systems integration for all PCBs within high-power laser systems.
• Conducts component-level debugging on PCBs, tracing faults from power supply rails to communication lines (CAN, SPI) and sensor data (ADC/DAC).
• Identifies burned/damaged components, performs SMD/THT rework and soldering to repair and validate boards.
• Developed an advanced auto-alignment algorithm using Particle Swarm Optimization (PSO) and PID control in Embedded C. This firmware uses a 4-Quadrant-Diode (4QD) PCB’s ADC signals to control piezo mirrors, automatically maximizing the laser’s power position.
• Developed an Autonomous Laser Alignment System using a PIC18F26K83. Implemented a Bayesian Optimization algorithm to maximize optical power by controlling a 2-axis piezo inertia mirror mount.
• Designed a "Virtual Encoder" in software to track position for an open-loop system.
• Configured the Internal ADCC in Burst Average Mode to filter high-impedance photodiode noise.
• Interfaced with a PI E-870.41 driver using a custom 20kHz multiplexed pulse train.
• Developed a robust CAN Bootloader for the dual-core dsPIC33CH, enabling remote firmware updates. Solved deep-level bugs related to hardware timer conflicts, slave core fuse-bit mismatches, and CAN state management.
• Installs and integrates validated PCBs into the final laser systems, verifying all CAN, power, and I/O cabling and debugging any system-level hardware/software conflicts.
• Contributes to the development of the C++/Qt-based system control software, integrating CAN protocols to control and test all PCBs from a unified application.

• Managing director (CTO/CFO) and founder of Savvi and Sparklyft
• Management of the entire product team incl. development team & content team
• Responsible for product strategy, go-to-market, project management, integration projects, business planning, etc.

• NocTime time tracking, workshop planner, meal delivery service app
• LLM-based chat bot to control the NocTime time tracking system via voice input
• New and further development of customer solutions based on the Noctica SAS app framework
• Technologies: Java 17, Spring Boot, JPA, Hibernate, JavaScript, TypeScript, Angular 20, Angular Material, React, C#, Docker, Bash, Git, GitLab, RedMine, SQL, DBeaver, MariaDB, PostgreSQL, Python, TensorFlow, Ollama, various LLMs

• Blockchain platform technology
• Blockchain digital platform / Digital Economy.

• Technology strategy planning concerning the client-server and blockchain environments
• Development of smart contracts for the EOS blockchain using C++, Python and JavaScript and for Ethereum using Solidity
• Development of the BLABBER mobile app for iOS and Android using React Native