Software Consultant

WFC is a web-based application and allows extensions in the form of TypeScript libraries.

• Programming and scripting languages: JavaScript, TypeScript, ControlScript from WinCC OA

• Setup of a comprehensive Shift Left DevOps architecture for end-to-end (E2E) system tests of 240+ applications
• Implementation of the Shift Left strategy for DevOps in the area of E2E system tests to ensure software quality at an early stage
• Development and maintenance of complex telematics solutions for real-time collection and analysis of vehicle data to systematically optimize fleet availability
• Focus on reverse engineering of existing systems, development of scalable dashboards, and integration and analysis of communication protocols (e.g. CAN, MQTT, REST)
• Design and operation of automated test systems, coordination of suppliers, and technical implementation based on functional and non-functional requirements at the interface between embedded development, data analysis, and system integration

• Analysis of the existing CAN communication between microcontrollers
• Analysis of the sensors used and the measured values collected
• Planning the CAN messages for transmitting the measured values
• Iterative adjustment of the microcontroller code to the new CAN messages
• Cross-compilation from x64 to arm64

optimizing business processes

IT consulting

• ERP
• intralogistics process
• production planning process
• Sales (wholesale, online, B2B B2C)
• product information management
• business intelligence

implementation

• interfaces (SAP, EDI, Databases, ERP, ...)
• ETL processes
• BI Reports

• Migrate SPARC T5 systems to SPARC T8 running Solaris 11.4

• Developed cloud-native enterprise applications on SAP Business Technology Platform using Node.js, SAP UI5, and RESTful APIs, delivering solutions across training management, procurement, employee information, and logistics domains
• Served as the primary developer for the maintenance, enhancement, and production support of three enterprise applications, delivering new features, resolving production issues, and coordinating releases with business stakeholders
• Experienced in leveraging AI-assisted development tools such as Microsoft Copilot to accelerate feature development, generate code, prototype solutions, and support application migration and modernization
• Designed backend services, domain models, and SAP Fiori/UI5 interfaces, implementing business workflows, role-based access control, validations, scheduling, reporting, and data import/export capabilities
• Designed and integrated enterprise services with SAP SuccessFactors, SailPoint, ERP systems, and external Learning Management APIs, including automated synchronization for 11,000+ user data
• Designed and implemented AMQP-based event-driven services processing up to 500 RFID parcel scan events per day for a logistics application
• Managed deployments and application operations using CI/CD pipelines, SAP Solution Manager, SAP BTP Cockpit, Kibana, and cloud monitoring tools, performing root-cause analysis and resolving production incidents
• Managed application dependencies by resolving npm package version conflicts and remediating critical and high-severity security vulnerabilities, ensuring production compliance and application stability
• Collaborated with architects, business users, SAP governance teams, and distributed Agile teams throughout technical design, code reviews, sprint planning, documentation, and software delivery

• Analysis of extended requirements related to existing controllers in an industrial plant
• Creating concepts for storing and visualizing sensor data
• Communication with PLCs
• Microservice architecture
• Unified architecture
• AI-based evaluations of sensor data
• Technologies used: .NET 8, Minimal API, Postgres, MQTT, RabbitMQ

• Earned the Microsoft DAT207x certificate on edX.
• Completion date: 21.01.2020.

Technical writer at a special-purpose machine manufacturer, implementing the requirements of the EU Machinery Regulation in the technical documentation and moderating FMEAs. Role: Technical Writer and FMEA Moderator

• Tech stack: Flutter/Dart, Unity3D, React, NextJS, JavaScript, TypeScript, HTML, CSS, SASS, SCSS, Tailwind, Bootstrap, Ollama, llama.cpp, LangChain, MCP, RAG, n8n, Node-Red, PlatformIO, Arduino, ESP, C, C++, Python/Django, NodeJS, C#, .NET, PostgreSQL, MySQL, MS-SQL, MongoDB, AWS, Azure, GCP, GitHub Actions, GitLab CI, Azure Pipelines, Ansible, Terraform, Docker, Postman, REST, WebSocket, Figma, Penpot, Adobe Illustrator, Adobe InDesign, VS Code, Android Studio, Visual Studio, Unity3D, Jira, Confluence, Traefik, Rclone, Authentik, pfSense, Cloudflare, Proxmox, MQTT

• Previous projects:

• n8n automation that reads incoming emails from an Office mailbox and routes them to stakeholders

• FastMCP 2 server exposing internal services via REST API to an LLM

• Terraform migration of cloud infrastructure with Azure VMs, network, blob, storage and cloud-init

• Azure Pipelines for automated testing, deployment, and artifact management

• Terraform, Ansible, Cloudflare Tunnel integration with Docker container provisioning and backups

• GitHub Actions CI/CD for Flutter app builds, testing, automated screenshots, and App Store deployment

• Flutter app with SSO, local database, backend integration, BLE synchronization

• GCP setup with Cloud DNS, App Engine, Cloud SQL

• AWS environment with EC2, S3, Route 53, ECS

• Workshops delivered on Docker, Git, Terraform, Ansible, Cloudflare, DevOps, modern software development practices

• Backend development with Python Django REST Framework, PostgreSQL, MQTT

• SSO identity provider with OIDC, OAuth, LDAP, Cloudflare Tunnels, Authentik

As project manager for the Odoo implementation at a small company, I was responsible for designing, implementing, and training a fully integrated CRM and accounting system. Through structured requirements analysis, precise data migration, and targeted change management, I was able to complete the rollout in just eight weeks. The project led to a significant reduction in manual tasks, faster business processes, and increased real-time transparency.

Main Responsibilities

Requirements analysis and process mapping Configuration of Odoo modules: CRM, Sales, and Accounting Data migration (Excel/CSV → Odoo) and quality control Creation of workflows, automated email rules, and dashboards Conducting training sessions and providing support after go-live Project coordination (budget, schedule, stakeholder communication)

Key Achievements

Full implementation of the Odoo suite within the set timeframe (8 weeks) 30% reduction in accounting time and 25% acceleration of the lead-to-sale flow 100% customer satisfaction after go-live, based on survey results Successful migration of 100% of existing master data without data loss Establishment of a sustainable support infrastructure (3-month post go-live support)

Impact

Improved decision-making through real-time dashboards and automated reports Increased efficiency and cost savings (≈ €8,000/month) Scalability for future growth (additional modules can be integrated seamlessly) Strengthened sales and finance departments through seamless process integration

This summary highlights how I created concrete and measurable value for the company through structured project work, technical expertise, and targeted training.

Further development, configuration and operation of DOXiS, a document management system at a large financial services company. Development of a document interface as a REST API to integrate with third-party systems using the Java Spring Framework. Programming client scripts in Visual Basic, as well as workflow and agent scripts in Groovy.

Design and implementation of a compact ERP, CRM, accounting, and production-planning platform for a German food manufacturer. The system replaces Rechnung11, self-built Excel sheets, and manual processes for fewer than 10 internal users.

• Designed and implemented the full platform architecture as sole architect and developer.
• Built modules for customer management, B2B order handling, invoicing, production planning, and accounting support.
• Implemented DATEV export, ZUGFeRD/XRechnung e-invoicing, FinTS bank statement synchronization, and GoBD audit trail concepts.
• Used AI-supported workflows for prototyping, test support, and implementation acceleration while retaining full architecture, review, testing strategy, and technical ownership.

Technology: Java 23, Spring Boot 3, Spring Data JPA, Spring Security, Vue 3, TypeScript, PostgreSQL, Flyway, REST, OpenAPI, JWT, TOTP, RBAC, DATEV, FinTS, ZUGFeRD, XRechnung, GoBD, JUnit, Mockito, Testcontainers, Playwright, Docker, GitLab CI/CD

• Ruby Rails, Python, React, CakePHP
• ERP consultant for various companies (Software: VenDoc)
• Constructed and managed data warehouses using MS SQL, Azure, SSDT, Power BI, Report Designer
• Managed and evaluated workflow and productivity, making changes where necessary
• Automated workflows to increase efficiency, e.g., invoice audit with OCR captures