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• Regulated environment within a German banking group (approx. 8,500 employees, hybrid cloud strategy).

• Responsible for operating, provisioning, and continuously securing business-critical platforms – including a GenAI chat application, a big data/AI platform, and data science workspaces based on Azure Virtual Desktops and VMs. Ownership of Azure DevOps projects for ShaiHulud and React2Shell, as well as BSI alerts – Security Operations improvements across the SDLC.

• Deployment responsibility for the GenAI chat application, big data/AI platform (BDAI), and data science workspaces (AVD/VM-based) in the respective landing zones.

• Deployment & release management: end-to-end responsibility for deploying portal and service applications across multiple Azure landing zones, including technical approvals, compliance with development team deployment guidelines, and ensuring ITIL-based change and release processes via ServiceNow.

• Azure landing zones & network architecture: design, provisioning, and operation of Azure landing zones for 3-tier web applications with enhanced network segmentation, VNet peering, hub-and-spoke architectures, private endpoints, and firewall integration across separate subscriptions and tenants.

• Azure DevOps governance & operations: ownership of the Azure DevOps organization, including projects, repositories, and CI/CD pipelines; implementation of governance requirements such as branch policies, approval gates, permission models, and audit-ready operating structures.

• Infrastructure as Code (Terraform): design, implementation, and operation of a modular Terraform architecture for standardized cloud infrastructure deployment, including state management, provider versioning, reusability, and policy-as-code approaches.

• CI/CD pipeline engineering: design, operation, and optimization of complex YAML-based CI/CD pipelines with multi-stage deployments, template standardization, self-hosted agents, integrated secret management, and automated quality and security checks.

• Git migration & platform consolidation: planning and execution of repository and pipeline migration from Azure DevOps to GitLab CI/CD, including automated scripts, full Git history transfer, pipeline porting, and platform consolidation.

• Container & platform operations (AKS): operation and security assessment of containerized workloads on Azure Kubernetes Service, centralization of on-premises container registries for ACR.

• OpenShift (OCP) security reviews: security assessment of code baselines, build pipelines, and deployment processes for on-premises OpenShift clusters with critical applications, and derivation of specific hardening recommendations.

• Shift-left security & DevSecOps transformation: introduction of a company-wide shift-left approach for early security integration in development and deployment processes, enabling developers to perform self-led security checks and sustainably reduce vulnerabilities before production (IDE integrations, pre-commit hooks, local scanners).

• Software supply chain security: analysis and mitigation of supply chain risks in NPM- and Yarn-based applications through dependency audits, CI/CD pipeline hardening, token rotation, and restriction of risky build and lifecycle mechanisms.

• Frontend & framework security (React / Next.js): security assessment and coordination of critical vulnerability remediation across platform applications and web frameworks, including coordination and complementary technical mitigations with all teams following BSI alerts.

• Software composition analysis (SCA): introduction and operation of automated vulnerability scans for container images, pipelines/artifacts, and third-party dependencies, including SBOM exports within CI/CD pipelines.

• SAST/DAST integration: design and piloting of static and dynamic application security tests in close collaboration with security architecture and development teams, for continuous improvement of code and runtime security, and establishing operational acceptance tests.

• Artifact & registry consolidation: analysis and consolidation of all package and container repositories for service applications and AKS workloads, aiming for a centralized, secured registry strategy with centralized vulnerability scanning and governance.

• Dependency-Track & SBOM strategy: advising the compliance board on introducing a central SBOM and vulnerability management platform to increase enterprise-wide dependency transparency and accelerate CVE response capability.

• CI/CD pipeline hardening: security analysis and cleanup of the existing pipeline landscape by removing unused pipelines, improving secrets hygiene, implementing least-privilege principles, and isolating build agent environments.

• Azure Web Application Firewall (WAF) optimization: analysis and tuning of existing Azure WAF rules (OWASP Top 10 Core Rule Set, DSR/SDC, custom rules) to defend against known vulnerabilities and exploit patterns, including reducing false positives and improving threat detection.

• Documentation & stakeholder communication: creating and maintaining technical documentation, runbooks, and architecture overviews in Jira and Confluence, as well as active knowledge transfer between operations, development, security, and compliance stakeholders.

• The Agent Support Interface is an internally used software that is used by all 1st- and 2nd-level customer advisors and shows information about the customer and their cases in a central and compact form.

• The system provides links to other platforms and systems to improve the agent's workflow.

• In an agile SCRUM team, all challenges were implemented independently and as a team.

• Consulting in the areas of software architecture, DevOps strategies, and agile development processes.

• Supporting the team in decision-making and introducing best practices for test automation and code reviews.

• Technologies: Microsoft .NET, Microsoft Azure, C#, MVC, CQRS, Akka.Net, Angular 18, NGXS, Typescript, Cypress/Playwright, Wiremock, CI/CD, DevOps.

• Optimization of the transmission media of the data links in the Ruhr area
• Configuration/expansion of switches and routers for an autonomous system AS
• Improve the network protocols used Layer 2/3 (OSI model), RSTP, broadcast, etc.
• Laying cables, crimping, antennas, routers, switches
• Maintenance, expansion, selection and prioritization of troubleshooting measures for network monitoring (PRTG, The Dude)
• Organization and new connection of another BGP peering, data center, NGN fiber optic
• VPN IPSec site connections for 6 sites with PFSense, Fritzbox
• Configuration of WLAN devices (Mikrotik, UBNT

Label: TCP/IP, VLAN, BGP, OSPF, MPLS, VPLS, routing protocols, WLAN, EoIP, PPPoE, routing, SNMP, DHCP, DNS, NAT, native IP, VLAN, Ethernet, VoIP., switches and routers from: Nortel, Cisco, MikroTik, UBNT., network management systems: The Dude, PRTG, UISP

• Implemented the BI solution and replaced the old BI landscape
• Led the “Sales Bonus Plan” subproject: expanded the existing solution and migrated to Azure (Databricks)
• Led the “Cognos Migration” subproject: expanded existing data warehouses based on MS technologies (source systems: Oracle), analyzed business requirements and designed the technical solution
• Expanded the relational DWH database
• Developed ETL processes using SSIS
• Developed the multidimensional database (OLAP Cubes/SSAS)

• The goal of Afworki GmbH IT-Consulting is to make small and medium-sized companies more competitive by overcoming challenges in digitalization, automation, and data management.

• Tailored technology, strategy, and specialist consulting designed to meet the individual needs of each company.

• Analyzing the company's current situation and developing the best possible solution together with the client.

• Using both agile and classical IT project management methods to deliver projects on time and within budget.

• Focusing on automating and orchestrating all data flows in a data warehouse to create a unified and standardized data foundation.

• Considering the dependencies between IT and business to achieve sustainable positive effects.

• Employing modern strategies and tools specifically tailored to the company's needs.

• Supporting digitalization, the introduction of agile working methods, and the creation of up-to-date reports and analyses.

• Objective: streamlining management and enabling well-founded, data-driven decision-making.

• administration, configuration, operation, installation, and troubleshooting of Windows Server systems (2016–2025) in a multi-domain infrastructure by tier level
• operation of Windows systems (VMware, Hyper-V, and physical)
• automated installation and patch management via MECM and WSUS
• support in the patch management process and backup process
• creation of server and operating system hardening according to BSI
• administration, configuration, and operation of Active Directory (AD)
• administration, configuration, and maintenance of group policies (GPOs)
• administration of cluster systems
• granting, modifying, and revoking access permissions and access groups
• control and documentation as well as coordination between business units and service providers
• change management: reviewing, evaluating, and controlling change requests
• performance analysis to optimize operating systems
• responsibility for solving malfunctions and internal service requests
• second- and third-level support
• creating documentation, operation manuals, and presentations
• working according to ITIL and IT baseline protection (BSI)

• Document analysis
• Preparation and visualization of results (Excel, PowerPoint)
• Consulting and recommendation for requirements analysis and management
• Presentation and handover

• SAP integration technical consultant
• Internal consultant/developer for SAP ABAP developments (ECC) in MM/SD/PP/HCM/QM/FI modules
• SAP Fiori/UI5 new development and application management services
• Account administrator for all applications in SAP BTP
• New development, enhancement, and maintenance of SAP SapScript, Smart Forms, and Adobe Forms
• Responsible for the SAP HCM module
• Certified Microsoft Power Automate Developer
• Certified Microsoft Azure AI Engineer

• Migrated backups and full workloads to AWS and Azure, including setup and management of AKS & EKS clusters.
• Automated infrastructure with Terraform & ArgoCD and implemented CI/CD pipelines with GitLab.
• Monitored systems on OpenShift 4 (on-premise) with Grafana & Prometheus, using CloudWatch and X-Ray for analysis and logging.
• Built and maintained secure network infrastructures (VPCs, SGs, WAFs, ACLs), integrated Azure Log Analytics.
• Collaborated closely with infrastructure and development teams, maintained technical documentation with Confluence, handled tickets via Jira, and promoted cloud knowledge within the company.

• Consulting and building various web applications based on SharePoint and the React framework for different clients
• Developing and testing accessible apps for SharePoint
• Creating various test cases for test automation
• Developing various solutions based on Azure
• Creating various web services using .NET
• Developing various SharePoint Framework solutions
• Developing various UI solutions based on SharePoint
• Consulting and building various Power Apps applications and Power Automate for a steel industry and an IT consulting company
• Providing support, consulting, and development with offshore teams for SharePoint 2013, 2016, and microservices for a logistics company
• Consulting, designing, and developing microservices and web applications based on Microsoft technology and the React framework for a logistics company
• Consulting, designing, and developing various SharePoint Framework solutions on SharePoint 2016 for logistics
• Consulting on the migration from SharePoint 2010 to 2016 for an IT consulting company

• New development of project space features
• Connecting a REST API of a custom-built web service (.NET 7/8) as an Azure App Service
• UI tests with Playwright
• Extending Azure DevOps pipelines
• Migration to Azure SQL Server
• Software / technologies: SharePoint Online, PowerShell scripts, SharePoint Framework, MobX, C#, Logic Apps, Playwright, Azure SQL Server, Graph API

• C# development in .NET 8.0
• Technical responsibility for architecture decisions (DDD, Clean Architecture, microservices)
• Introduction and systematic evaluation of GitHub Copilot, analyzing efficiency benefits, identifying suitable use cases, assessing code quality
• Developing best practices for using Copilot in the team, supporting rollout and coaching individual developers
• Conducting code reviews, architecture documentation according to Arc42
• Building stable CI/CD pipelines with Azure DevOps, introducing automated quality checks with SonarQube and .editorconfig
• Collaborating with stakeholders for continuous improvement of technical concepts
• Technologies used: Azure DevOps Server, Git, SonarQube, Visual Studio 2022, Sparx EA 17, Nagios LS, Nagios XI, C#, ReSharper 2.24.3, Clean Architecture, DDD, EF Core, Arc24, microservices, Angular, MediatR, SignalR, Copilot, OpenAI

Concept and development of a C#, .NET Core 8, Blazor-based SaaS solution for workforce planning and management of security services.

Responsibilities

• Develop the application with C# and .NET Core 8
• Design the user interface with Blazor, Radzen, and Telerik
• Integrate Telerik components for advanced UI features
• Use Dependency Injection (DI) and Inversion of Control (IoC) to optimize the architecture
• Use Visual Studio 2024 for development
• Manage versioning and team collaboration with Git and Azure DevOps

Tools & Technologies C#, .NET Framework, .NET Core, ASP.NET Core, Entity Framework Core, Blazor, Visual Studio 2024, ReSharper, Telerik, Radzen, WPF, XAML, T-SQL, Azure SQL Server, DevOps, JavaScript, Linq, IoC, DI, Json, XML, Git, Agile, Scrum, Kanban, Docker, OAuth 2.0, REST API, HTML, CSS, Clean Code, Unit Tests, TDD, VBA (Visual Basic for Applications)

• Development and maintenance of database-driven applications for managing supplier and food contracts, using Oracle PL/SQL extensively 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 adherence to best practices in PL/SQL development and implementing standards for code quality and data integrity
• Close collaboration with backend and frontend teams to ensure seamless integration between the Oracle database, C#-based APIs, and Azure cloud services