VB.NET Experts in Germany

• Mendix low-code development / project management
• Managing external resources
• Customer and user management, roles
• Master data entry
• Quote preparation
• Material costing
• Workflows
• Basic CRM functions
• API interfaces (email, SMS, AI chatbot)
• PDF API (.NET development using Aspose.PDF)
• Stakeholder management (dev teams, enorin team, test client)
• Risk management (backend access & sizing, role concepts)
• Testing and staff training
• Creating epics and stories in Confluence
• Jira Scrum planning and management

• Consulting and development of suitable communication concepts between S7-300 and S7-1500, taking the existing PROFIBUS infrastructure into account
• Technical support for connecting the S7-300 controllers to the existing recipe data block of the S7-1500
• Assisting in the development of the communication sequence for recipe access (read, write, acknowledge, status handling)
• Configuration of S7 communication (PUT/GET)
• Creation and adaptation of WinCC V7 scripts (C scripts and VBS scripts) for WinCC-based recipe management
• Development, optimization, and integration of recipe processes into the existing WinCC project structure
• Commissioning of the new communication interfaces and recommissioning of the recipe logic on existing systems
• Creation of technical documents: communication sequences, functional descriptions, commissioning documentation

• 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

• Industry: SaaS (Customer Success Management) – B2B

Comprehensive GEO implementation (Generative Engine Optimization) for a B2B CSM SaaS startup with a focus on AI Search Visibility and AI Citations in ChatGPT, Perplexity and Google AI Overviews – including a GEO workshop and a prioritized implementation roadmap.

• GEO Workshop & Roadmap: Conceptualized and delivered a GEO workshop (how LLMs work, AI Search Architecture, citation strategies); translated it into a prioritized implementation roadmap with impact/effort estimates
• Technical GEO Foundation: Robots.txt & llms.txt, Core Web Vitals & page speed, XML sitemaps for AI crawlers
• Schema & Structured Data: Gap analysis, implementation of Product/Service, FAQ, Article, Author and Organization schema, validation of coverage
• Content Architecture & GEO: Flat content architecture, topic clusters (pillar-and-spoke), 200–300 word chunks and answer-first content structure, E-E-A-T rollout through author pages
• Query Fan-Out & Prompt Anticipation: User prompt mapping, query fan-out, content gap analysis based on prompt coverage
• Citation & Backlink Strategy: AI citation analysis (news, Reddit, Wikipedia, listicles) and development of outreach and backlink strategies

Tools & technologies: Otterly.AI, PeecAI, Qforia (iPullRank), Schema Markup Validator, OpenAI Tokenizer, Prompt Coverage Monitor, ChatGPT, Perplexity AI, Semrush, Ahrefs, Framer CMS

• Devised a new Domain-Driven Design architecture for a core system: reverse-engineered a central component, refactored the data-access layer to minimise database round-trips (improving scalability) and migrated processing to async.
• Decomposed the platform into independent .NET Core microservices (database-per-service) with RabbitMQ pub/sub using the Outbox Pattern + Saga choreography, behind an Ocelot API Gateway (JWT, rate limiting, CORS, health checks).
• Delivered on .NET Core / Angular / SQL Server / EF Core with Docker and Azure DevOps CI/CD; implemented health checks and CORS; contributes technical designs for stories in agile Scrum.
• Sole ADR owner; mentored 3 engineers and presented architecture decisions directly to the Director of Corporate IT.

PHP and React redesign of a web-based ERP system.

• Development of the header and parts of the navigation
• Development of various modules in React, e.g. calendar, chat, and various tables

• Testing interfaces between various systems
• Planning and coordinating test activities for features/improvements
• Selecting and adapting suitable test methods and procedures based on the test strategy
• Preparing and running test sessions
• Analysis, design, implementation, and documentation of manual and automated software tests
• Creating test cases and test scenarios using systematic test case specifications
• Performing and documenting system tests, regression tests, and smoke tests
• Monitoring and analyzing the executed test cases
• Maintaining and supporting the infrastructure and test data
• Analyzing and fixing error states related to test automation
• Documenting and tracking deviations, as well as supporting root cause analysis
• Analyzing errors and error tracking
• Working closely with product management

• 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

• Many years of work in different roles within the MES product area, with technical development, agile leadership, and strategic product responsibility for key MES components.
• As C# Fullstack Developer / Scrum Master (2018–2020): further development of a programming system for laser machines, introduction and moderation of Scrum processes, quality assurance through automated tests and documentation.
• As Product Owner Cloud Services (2019–2020): leadership of two AWS-based cloud services for providing laser data and legal documents, definition of the product vision, backlog maintenance, and stakeholder communication.
• As Product Owner Infrastructure & Core Services / Head of DevOps / Product Security (2020–2025): responsibility for core MES components such as Service Orchestrator, Licensing Service, IAM, and AppLauncher, building and maintaining Azure DevOps pipelines for over 70 components, and introducing security standards (CRA).
• Company-wide contact for Azure DevOps and largely responsible for its introduction.
• Standardized versioning of all components.
• Structuring of CI/CD and release pipelines.
• Building an agent scale set with special software configuration.
• Connecting Azure DevOps with ServiceNow.
• Standardizing the integration of security tools such as SonarCloud, Dependency Track, and digital signing.
• Technologies & tools: .NET (C#, 4.8 / Core 3.x / 8), WPF, WCF, REST, OData, JSON, DevExpress, Duende IDP, Azure DevOps, AWS, PowerBI, SonarCloud, Dependency Track, Visual Studio Pro.
• Method: Scrum.
• Project language: German / English.

• 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

• data integration for SAP marketing applications Emarsys and SMC
• processing data from SAP applications for email delivery
• event-driven architecture with around 50 microservices for processing several million messages per day during high season
• development of a marketing campaign management tool (frontend Angular, backend C# ASP Web API)
• support for the Product Owner in communication with stakeholders and creation of epics, stories, and tasks

• Conceived and implemented customer solutions, accurately estimating project efforts
• Tested and documented fully developed software using C# and Visual Basic with .Net
• Collaborated in the installation, configuration, and maintenance of SAP Business One systems
• Utilized Microsoft Visual Studio and version management (SVN) for efficient development
• Managed code repositories and collaborated with teams on GitHub for seamless workflow and version control
• Provided 1st and 2nd level support for SAP Business One users, promptly resolving issues
• Collaborated with customers to troubleshoot and optimize add-on solutions
• Familiarity with FSM SAP integration, facilitating efficient field service management
• Leveraged GitHub for issue tracking and knowledge sharing within the support team

• Backend development: .Net 8, C#, PostgreSQL, Entity Framework Core, REST Web APIs, Docker, Kubernetes, Kafka, Open API Swagger, Apache Airflow, Resharper, Git, Microservices, SOAP, gRPC, Hangfire, OAuth 2, GraphQL
• Interface development for document processing with SmartFix, Softexpansion and Natif.ai: C#, REST API, Resharper, Git
• Deployment: Azure DevOps YAML, Vanilla Helmchart, Rancher, Kubernetes Cluster, Linux Docker, Windows VM, Python
• Unit tests and integration tests
• Telemetry, Kibana, Grafana, Elastic Search
• Work in a Kanban team of 8 developers, 1 tester and one Product Owner

• Development and implementation of test concepts for complex, multi-layered systems
• Creation of regular management reports and presentations for stakeholders and clients
• Technical and disciplinary leadership of international test teams (coordination, coaching, resource planning)
• Responsibility for quality assurance across multiple test levels (unit, integration, system, and acceptance tests)
• Design of test cases and test plans in Azure DevOps; ensuring traceability and coverage
• Use of BDD approaches (Gherkin/Cucumber) to prepare test automation
• Building a test automation architecture with Playwright and integrating new tests into CI/CD pipelines
• Performing API tests (REST) and tests for mobile/PWA applications
• Setup and maintenance of test environments across multiple stages (integration, QA, UAT, pre-production)
• Test data management (synthetic and production-like data), ensuring consistency and reproducibility
• Collaboration with DevOps teams for containerization (Docker/OpenShift) and CI/CD integration
• Working under SAFe & Scrum, closely coordinating with product owners and DevOps teams
• Active participation in PI plannings, sprint reviews, and retrospectives
• Promoting an agile QA culture through coaching and knowledge sharing
• Introducing scalable test automation with Playwright → significant reduction of manual testing efforts
• Increasing test transparency through clean defect and reporting management in Azure DevOps
• Improved release quality through an end-to-end QA strategy and automated regression tests
• Strategic leadership of Trikolon Consulting GmbH and responsibility for finance, personnel, and business development