DevExpress Experts in Germany

• 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.

• Industry: Digital music solutions
• Technologies used: Flutter, Dart, iOS, Android, GitLab, PlantUML

• Strategic project development, realisation, and implementation with internal and/or external development team
• Multi stakeholder management
• Planning new projects, cost calculation, risk calculation
• AI project for the electrical components production
• Building management systems integrations (BACnet, Modbus, etc)
• Inhouse BACring system architecture and development (control system for fire protection and smoke extraction systems)
• Inhouse MES system architecture and development
• Project management
• Agile-SCRUM project development
• Solution architecture and processes analytics (UML)
• Business application development
• Jira project management
• Reporting and documentation
• Recruitment process for the IT staff
• Software architecture, project development, costs, risks
• Education IT staff (internal and external)
• Responsibility for 5 development/DevOps/QA teams

• 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

• Design and implementation of a Laravel backend API for provider-based geo search, feature details, boundary geometries and neighborhood detection.
• The API serves as a server-side proxy, cache and enrichment layer, protecting credentials for external geo services and persisting features, localizations, geometries, hierarchies and neighborhood relationships in MariaDB.
• Key areas included normalization of autocomplete and feature data, caching strategies for expensive boundary/polygon requests, spatial processing of GeoJSON and MultiPolygon geometries, as well as neighborhood detection using hierarchies, bounding box filters and topology checks.
• Additionally, separate production and diagnostic endpoints were created, along with status and error catalogs, discovery logging, a Docker development stack, API documentation, and unit and feature tests.
• Technologies: PHP 8.3, Laravel, REST API, geo data API, GeoJSON, MariaDB Spatial, Eloquent, Laravel Queues, PHPUnit, Mockery, Docker, Docker Compose, API design, geocoding, boundary data, spatial queries.

• Developed a modular application framework as a future foundation and to consolidate over 500 in-house applications.
• Role: Software Architect.
• Process: Scrum, 9-person team, Clean Code principles.
• Technologies: Visual Studio 2022, Git, C# 12, .NET 8.0, WPF, MVVM, xUnit, WiX Toolset 4, Visual Studio Templating, Enterprise Architect, REST services, SignalR, SAP, Oracle DB, OAuth 2.0, OpenID.

• Upgrading the existing Delphi 2010 version to Delphi 10.4.
• Making all software products Terminal Server compatible.
• Maintaining and enhancing the in-house shipping software until it is replaced by a newly purchased version.
• Technologies: Delphi 2010, Delphi 10.4, Advantage Database, DevExpress, Git, Devart, OOP.

• Implemented modernization measures to optimize processes in the insurance domain
• Replaced old interfaces with newer APIs
• Merged several smaller solutions into one main solution to improve builds and increase efficiency in the development process
• Replaced the persistence solution in the backend from Telerik to NHibernate
• Created unit tests to secure the code

• Extension of test software for functional testing of IO modules in WPF with MVVM
• Configuration and extension of a specialized WPF control from Nevron
• Connection to Siemens PLCs via Siemens OPC UA Client and Allen-Bradley/Rockwell PLCs via Codebix OPC UA Client
• Integration of various data sources via REST API and JSON
• Development of stored procedures, views, and triggers for PostgreSQL and SQL Server with ADO.NET and Entity Framework 6

• Developed high-performance REST API interfaces in C# for Investitionsbank Berlin (IBB) using CI/CD (Git, Azure DevOps).
• Developed the "Pean Admin Center" using the Microsoft Graph API (backend: C#, frontend: Vuetify), implemented via CI/CD pipelines (Azure DevOps).
• Created low-code business applications and automated processes with Power Apps and Power Automate.
• Set up and designed the online shop for Pestalozzi-Fröbel-Haus (PFH) via Wix.

• Fixing issues in the application logic

• Covering the changes with component tests

• Analyzing and documenting the data structure of the different applications

• Analyzing and documenting the parameters for configuring the applications

• Analyzing and documenting the necessary measures to ensure the operation of the applications

• Analyzing and designing the separation of the individual database structures

• Analyzing and estimating the effort for planned enhancements

• Analysis, maintenance and documentation of a heterogeneous legacy system landscape for a print media service provider

• Technology: C#, VB.NET, C, Python, Microsoft SQL Server, Visual Studio 2010, JetBrains Rider, Visual Studio Code, arc42, Draw.io, Jira, GitLab

• Many years of work in various 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 facilitation of Scrum processes, quality assurance through automated tests and documentation.
• As Product Owner Cloud Services (2019–2020): led two AWS-based cloud services for providing laser data and legal documents, defined the product vision, managed the backlog and communicated with stakeholders.
• As Product Owner Infrastructure & Core Services / Head of DevOps / Product Security (2020–2025): responsible 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 point of contact for Azure DevOps and majorly responsible for its implementation.
• Standardized versioning of all components.
• Structuring CI/CD and release pipelines.
• Building an agent scale set with a custom software configuration.
• Integrating Azure DevOps with ServiceNow.
• Standardized integration of security tools like 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, Power BI, SonarCloud, Dependency Track, Visual Studio Pro.
• Methods: Scrum.
• Project language: German / English.

• Newly developed an ASP.NET web application for mortgage financing
• Maintained and enhanced it both functionally and technically (expanded to other loan types, connected to various services, developed custom web services)
• Analyzed business requirements in close cooperation with business units
• Created IT concepts and technical documentation
• Developed backend and frontend
• Designed and implemented automated build, deployment, and testing processes
• Created scripts to automatically generate data access layers (C# classes and SQL scripts) and integrated them into build and deployment processes
• Languages: C#, PowerShell, JavaScript
• Technologies: ASP.NET, Windows Forms, XML Web Services, Windows Services, MS SQL Server, Entity Framework, unit testing, automated build, deployment, and testing processes
• Tools: Visual Studio 2005–2015, Team Foundation Server, DevExpress, Rational ClearCase, Rational ClearQuest, CruiseControl.net

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)