.NET Experts in Düsseldorf

• Analysis and remediation of security vulnerabilities in a risk assessment system for energy trading
• System analysis
• Threat modeling
• Decision-making on vulnerability mitigation strategies
• Implementation of vulnerability detection mechanisms
• Security scans
• DevSecOps practices
• Technical environment: Visual Studio Code, JetBrains Suite, MS Threat Modeling Tool, DevSecOps, Git, AWS, DynamoDB, SQL Server, Endur, Snowflake, Orca
• Languages: C#, JavaScript, TypeScript, Python, PowerShell, Bash, Terraform, SQL

• Architected and deployed a live B2B geocoding and demographic-data platform for Germany, combining address lookup with census-based population statistics through a web application and REST API.

• Self-employed PLC and software specialist focusing on automation and special-purpose machinery
• Programming, modernization, expansion and optimization of production systems, focusing on increased efficiency, data transparency and system integration
• PLC programming and safety with Siemens S7 Classic/TIA Portal, Beckhoff TwinCAT 2/3 and CoDeSys
• Development of high-level language software and database applications (.NET / C#, C++, Visual Basic .NET, Borland/Embarcadero C++)
• Development of custom software solutions for industrial automation, including embedded systems (Raspberry Pi, Arduino, NodeMCU, ESP8266)
• Integration of external systems such as reading devices, printers, scales, scanners and cameras, as well as various bus systems (Ethernet, Profinet, Profibus, EtherCAT, CAN bus, RS232, TCP/IP)
• Creation of visualizations and HMI applications with Siemens WinCC flexible, Beckhoff HMI and .NET frontends
• Planning, development and integration of machine vision solutions (Keyence, Cognex, AVS Alfavision, camera systems) in PLC and PC environments
• Design and implementation of process data collection systems and traceability solutions (100% traceability) based on Microsoft SQL Server (Compact, Express, Server), including stored procedures and direct PLC-SQL communication
• Creation of software and PLC concepts, standard function blocks and project libraries for PLC and high-level language projects
• Planning and programming of conveyor, inspection, assembly, packaging and grinding systems in industries such as automotive, chemical, food, electronics, machinery and systems engineering
• Conducting workshops and training on Siemens TIA Portal, STEP7 Classic, Beckhoff TwinCAT (including TwinSAFE), as well as topics such as architectures, safety, database integration and documentation
• Creation of technical documentation, manuals, training materials and class documentation with Microsoft Office and Doxygen
• Project management tasks from requirements analysis through planning, concept development and supplier coordination to commissioning, production support and customer support

• Supporting several agile teams in the new product development of an enterprise CRM and ERP application
• Web frontend development with Angular 17–21 (microfrontends, Domain-Driven Design, MDB-Bootstrap)
• Backend development with C# and .NET 7–10, MongoDB, MassTransit, RabbitMQ, Entity Framework Core, ElasticSearch (microservices, DDD)
• Technical feature design for assigned tasks
• Technical architecture design including forward-looking planning of AI-supported extension options
• Proof-of-concept implementation of AI-supported workflows with n8n and a locally hosted LLM (Ollama)
• Coordination with stakeholders and Product Owners, support with sprint planning

Result: Delivery of production-ready microservices and frontend modules in agile sprint cycles.

Environment: .NET 7–10 · Angular 17–21 · C# · TypeScript · OpenAPI · Microfrontends · DDD · Kubernetes · Docker · Helm · MS SQL Server · PostgreSQL · MongoDB · MassTransit · RabbitMQ · EF Core · ElasticSearch · Kibana · Azure DevOps · KeyCloak · n8n · Ollama

• Development of a pilot system to control and monitor multiple GoPro cameras
• Implementation of start, stop, status, media, download, and diagnostic functions via COHN endpoints
• Realization of camera detection, single and group control, as well as stable session/keep-alive logic
• Setup of a download pipeline with queue, retry handling, and temporary files
• Consistent session, folder, and file naming for multi-camera recordings
• Integration of provisioning, certificates, and network operations

• Development and maintenance of database-driven applications for managing supplier and food contracts, with extensive use of Oracle PL/SQL for complex business logic and data processing
• Optimization of PL/SQL procedures, functions, and triggers to ensure the performance and scalability of Oracle database solutions
• Ensuring compliance with best practices in PL/SQL development and implementing standards for code quality and data integrity
• Close collaboration with backend and frontend teams to ensure smooth integration between the Oracle database, C#-based APIs, and Azure cloud services

• Redesign of the “Hessian Platform for Migration and Refugees”
• Technologies: C#, .NET 8.0, ASP.NET WebAPI, Blazor
• Architecture principles: Domain Driven Design, Mediator Pattern, Outbox Pattern, IOSP, Clean Code
• Methodologies: SCRUM, coaching, team lead

• Enterprise application packaging and deployment for Allianz's global Windows migration programs across Europe, North America, and APAC
• Migrated hundreds of enterprise applications from Windows 10 VDI to Microsoft Azure Windows 365 (Windows 11)
• Created software packages in MSI/MST, FlexApp, PSADT 3/4, and App-V according to enterprise packaging standards
• Developed an ASP.NET packaging automation platform with MongoDB, SQL Server, SharePoint, and Outlook integration
• Built PowerShell modules for automated quality checks of MSI and FlexApp packages
• Developed a release conflict detection module in PowerShell to identify potential deployment issues before production
• Created WDAC monitoring scripts for automated policy oversight and incident response
• Implemented MSGraph API calls in PowerShell for Azure AD and Intune operations
• Created Citrix oData scripts for historical usage analysis (BYOD, VDI, fat clients)
• Developed an Intune Win32 app 'Do Not Disturb' deployment routine for an optimal user experience
• First point of contact for troubleshooting production incidents with packaged applications
• Coordinated application owner, UAT, and release testing for hundreds of deployments
• Administered Microsoft Intune, Citrix environments, and SQL Server security
• Created and tested WDAC policies in Intune; managed configuration policies and Win32 app deployments
• Primary packaging resource for Allianz France since 2019

• Led end-to-end delivery of WHOacademy.org, defining product vision, success metrics, and execution strategy for a global learning platform built on Open edX and hosted on Azure.
• Drove program execution across cross-functional teams (UX, frontend, backend, mobile, DevOps, content), coordinating delivery of web (JavaScript) and iOS/Android applications through structured CI/CD pipelines, ensuring predictable, high-quality releases.
• Managed senior stakeholders across multiple WHO entities and external partners, aligning priorities, roadmap, and KPIs to measurable outcomes including platform adoption, performance, scalability, and learner engagement.
• Oversaw vendor and partner performance, ensuring compliance with SLAs, timelines, security, and quality standards.
• Led complex multi-organization migrations (IARC, PAHO, WPRO, OpenWHO), managing course, user, and data transitions with minimal disruption and clear risk governance.
• Provided post-launch Level 2 production support, collaborating with Global Service Desk teams and leveraging ServiceNow for incident, problem, and change management, ensuring platform stability and continuous improvement based on operational metrics.

• Various programming tasks as specified
• Work carried out from home office, meetings/tasks via email, phone and Microsoft Teams
• Version control via GIT
• Implementation with RDI, FreeSQL SQL
• Extension of automatic test environment creation as specified - adding automatic transfer of existing iSeries users and preparation as well as anonymization of test data
• Creation of trigger and service programs in SQLRPGLE, FreeRPG, ILE RPG and CLLE
• Development and implementation of the CallKredite project including additional extensions for other departments
• Conversion of RPG to Free-RPG and SQL as well as extension of existing modules as specified
• Migration to a new banking release
• Support for specialist segment / OIV

• Led SampleManager LIMS 21.x & LabWare LIMS v8 implementation, reducing manual lab errors by 40% and improving data traceability.
• Configured LW LIMS & SM LIMS 21.2: workflow design, role-based access control (RBAC), and master data management.
• Designed and configured LES workflows: sample lifecycle management, test assignments, approvals, and result review processes.
• Managed Master Menu and CI configuration, ensuring consistency, data integrity, and regulatory compliance.
• Integrated LIMS 21.2 with MES, ERP, EM, WinKQCL (Lonza MODA), SoftMax Pro, Empower, and Chromeleon CDS via REST APIs and web services.
• Implemented PAS-X MES: architecture design, multi-platform implementation (PAS-X, Siemens Opcenter), and integration with PLC, SCADA, and DCS systems.
• Executed IQ/OQ/PQ qualification protocols and Validation Summary Reports (VSR) for QC analytical and utility systems in aseptic and sterile production environments.
• Developed and reviewed Risk Assessments, Traceability Matrices, and Data Integrity evaluations in accordance with ALCOA+, 21 CFR Part 11, and EU Annex 11.
• Led EMA/FDA/WHO inspection readiness, standardized CQV SOPs, enabled digital CQV integration (LIMS/CDS/MES/SCADA/ERP/SDMS), and ensured 21 CFR Part 11 & Annex 11 compliance.
• Managed secure OT cybersecurity: network configuration and access control.
• Configured NuGenesis SDMS for document/data management, CDS/LIMS integration, workflow automation, and reporting.

• Design, development, and execution of load and performance tests for the PRISMA project
• Use of Apache Jmeter, Gatling, Apache ActiveMQ, Jms/Tibco Ems, SikuliX, Jython, Amazon AWS, PAN-Client
• Methods: load tests, test automation

• Migration of a .NET Core loyalty program for Snipes, used by mobile cash registers in Snipes stores
• Part of the customer’s digitalization strategy in an agile, cross-functional team with a high level of ownership
• Connecting interfaces to third-party systems (e.g. Brandung, CDS)
• Quality assurance through automated tests
• Carrying out developer, unit, and integration tests
• Patterns & methods used: Clean Code, microservice architecture, agile development with SCRUM
• Technologies & tools used: Spring Boot, Java 23, Java Persistence API (JPA), Azure DevOps, Azure Key Vault, Azure PostgreSQL, Docker & Kubernetes, Git, Graylog, Grafana, JUnit, SonarQube, Jira, Confluence, Prometheus, GitLab, GitLab CI/CD, Visual Studio Code

• Development and programming of PLC controllers and servo drives, such as TIA Portal, Siemens Step7 Classic, RSlogix/Studio5000, Unity Pro and CODESYS
• Visualization systems WinCC, FactoryTalk VIEW
• Integration of various fieldbuses into automation devices (PROFIBUS, PROFINET, DeviceNet, ControlNet, Ethernet/IP, MODBUS)
• Script programming (C# / VB.Net / VBscript / VBA)
• Selection of electrical components and systems
• Commissioning and optimization of simple to complex plants and machines
• Planning and creation of electrical schematics
• Preparation of installation plans
• Preparation of bills of materials and technical calculations
• Feasibility studies