Wolfgang Dietzinger
Mechanical engineering manufacturer, Erding, part-time
Experience
Mechanical engineering manufacturer, Erding, part-time
- Update C++ GUI using MFC
- Estimate effort for migrating the GUI to Qt
Process automation, automation technology manufacturer, Karlsruhe
- .NET 4.8/ C#, Angular 17, RxJs, IIS, HTML, CSS, Unit-Tests
- Create and maintain client-side web applications with Angular
- Maintain server-side web applications with the ASP.NET Framework for an automation technology web application
ETL process documentation, payment service provider, Berlin
- .NET 6/ C#, Entity Framework, SQL-Server, Kafka Client, Event Driven Architecture
- Document message processing for Kafka topics and SQL Server
- Document message processing for REST and GraphQL interfaces
- Maintain and troubleshoot ongoing operations
Identity verification, recruitment agency, Mannheim
- .NET 6/ C#, Entity Framework, SQL-Server, REST, xUnit, Azure DevOps, Blazor Web App, Atlassian Jira/Confluence, Open API/Swagger
- Develop microservice REST APIs for identity verification
- Create a Blazor web frontend for personal data
- Unit tests and deployment
Machine control, mechanical engineering, near Bielefeld
- .NET 6/ C#, MongoDB, REST, xUnit, Gitlab, Docker, SkiaSharp, Open API/Swagger, RabbitMQ, Event Driven Architecture
- Develop microservice REST APIs for machine data and program control of a conveyor system
- Process images with SkiaSharp for error detection on the conveyor belt
- Unit tests
Order Management in Mechanical Engineering, Velbert
- .NET 6/ C#, MS SQL Server, Entity Framework Core 6, REST, xUnit, Gitlab
- Create REST APIs for accessing SQL Server 2019
Measurement Data Management, Ingolstadt
- Java JDK 1.8, Spring Boot, PostgreSQL, Kubernetes, MS Azure, Angular 10, Kafka, Helm Charts, BLOBs, Elasticsearch 7, OpenAPI/Swagger, AWS
- Backends with BLOB storage for measurement data and metadata indexing using Elasticsearch, Spring Framework and Spring Boot
- Data management with PostgreSQL and JPA repositories
- Migrating the application to MS Azure AKS Kubernetes with Helm Charts
- Front-end with Angular Material and Ngrx Store
Backend analysis of a mobile route planning app, Düsseldorf
- .NET Core 3.1, C# 8, Entity Framework, Oracle DB, RabbitMQ, SOAP XML
- Analyzed a mobile route planning app and designed the backend architecture with message queues based on RabbitMQ
- Defined the requirements for phasing out the existing backend system and running in parallel
Extending a mobile route planning app, Düsseldorf
- Ionic Framework, AngularJS, C#, .NET 4.8, Entity Framework, Newtonsoft JSON, MySQL, RealmDB
- Extended a mobile app with ASP.NET JSON web services
- Built the front end with AngularJS and Ionic
- Implemented a payment interface
Converting a sales database price calculation to .NET Core 3.1, Munich
- PostgreSQL, C#, .NET Core 3.1, Entity Framework, Newtonsoft JSON, Docker container, PHP 7, MongoDB, VueJS, xUnit, Serilog, Angular with NgxAdmin
- Converted a price calculation for the internal sales database from PHP 7 to ASP.NET Core JSON web services
- Migrated the domain model from MongoDB to a PostgreSQL database
- Adjusted the admin web application with VueJS and .NET Core JSON web services
- Unit tests with xUnit
- Deployed web services as Docker containers
- Redesigned the NuxtJS web front end to Angular with NgxAdmin as a portal solution and built a prototype
Frontend and Backend Architecture, Koblenz
- NodeJs, React NextJs, HTML5, Yarn
- Designing architecture for the frontend with React NextJs and a monorepo using Nx for React components
- NodeJs REST web interfaces for front-end development
Rebuilding a GIS web application to Angular 9, Munich
- Angular 9, OpenLayers GIS, C#, .NET Core 3, HTML5
- Rebuilding a GIS web application from PHP 7 Symfony to Angular 9 and .NET Core 3
- OpenLayers web maps
Risk assessments for a banking group, Munich
- C#, .NET 4.7, ASP.NET Razor Pages, HTML5 and jQuery components, Visual Studio 2017, MS SQL Server
- Creating functional extensions for forecasting models and risk assessments for bank clients
- Fixing bugs
- Documentation
Energy production with consumption forecasting and numerical optimization, Dresden
- Azure Cloud Docker and DB, NestJS, TypeScript, GraphQL, TypeORM, NodeJs 12, PostgreSQL, R and numerical optimization, OpenAPI/Swagger
- Architecture and design of the system for Docker containers and MS Azure Cloud
- Creating web services to collect plant data from energy producers using the NestJS framework in TypeScript
- Building a data access layer with GraphQL for a web frontend with a PostgreSQL database
- Controlling numerical solvers for consumption forecasting and optimizing schedules of electrical equipment with R, COINOR and GLPK
Industry 4.0 IIoT machine integration, Dresden
- Operational data collection with edge gateways
- Consulting on edge gateway architecture and interfaces
- Market overview of IoT gateways and data interfaces to PLC controls
Industry 4.0 IIoT Operational Data Acquisition, Dresden
- Azure Cloud Docker and DB, C#, .NET Core 2, Visual Studio 2017, Java, Spring Boot, Kafka, MQTT, time series PostgreSQL/TimescaleDB
- System architecture and design for Docker containers and MS Azure Cloud, including selecting and evaluating system software
- Built an application to collect and analyze operational data from packaging machines
- Read machine messages from Apache Kafka and stored them as time series in PostgreSQL using Spring Boot
- Created Docker images for Kubernetes clusters
- Designed a database schema for PostgreSQL and TimescaleDB
Test Data Acquisition Electronics Manufacturing, Munich
- C#, .NET 4.7, Visual Studio 2017, WPF
- Extended an application to collect and analyze operational data from electronic component production
- Enhanced the GUI using WPF
- Analyzed testing results of electronic modules
IoT Portal Prototype, Greater Frankfurt Area
- C#, .NET Core 2, Entity Framework Core 2, Azure Cloud SQL DB / Functions / IoT Hub, Visual Studio 2017, GIT, xUnit, Dapper, OpenAPI/Swagger
- Created REST web services for an IoT portal to store device data
- Data storage in Azure SQL DB with Entity Framework Core 2 and Dapper
- Azure Cosmos DB with a Gremlin GraphQL prototype
- C# Azure Cloud Functions
- Azure API Gateway for cloud functions
- Tested measurement data with MQTT against MS Event Hub and MS Event Grid
- Updated devices in Azure IoT Hub
- Unit-tested all functionalities
- GitLab GIT source control
- Implemented data access from the API Gateway to the database
Energy Consumption Portal, Munich
- C#, ASP.NET Core 2, Entity Framework Core 2, Azure Cloud SQL, Visual Studio 2017, GIT, xUnit
- Created REST web services for an energy consumption portal
- GitHub source control
- Docker containers for Microsoft Azure
Tax Reports as a Web Application, Munich
- C#, ASP.NET Core 2, Entity Framework Core 2, Angular 6, CSS, Azure Cloud SQL, Visual Studio 2017, GIT
- Developed a web application to capture financial accounting (FIBU) data for tax analyses and reports, using Angular 6 for the web frontend and ASP.NET Core 2 with REST interfaces
- Implemented data import and export in the Azure SQL database using .NET Entity Framework Core 2
Seller Portal for Electronics Retailer, Ingolstadt
- Spring Boot Framework, Java, Angular 4, CSS, JUnit 4, Docker containers, Ruxit Docker Monitoring, IntelliJ, continuous deployment with Jenkins, SOAP XML
- Creating web pages to display customer data with AngularJS SPA
- Tablet app for customer self-service with Angular 4 SPA, HTML barcode
- REST web services with Spring Framework 1.5
- SOAP XML clients for backend systems with Axis2
- Oracle DB with auxiliary tables
- Creating PDF forms
- Web services as Docker containers in a Rancher cluster
- Troubleshooting and quality assurance in distributed data stores
- Reviewing Jenkins build scripts
- Designing customer web app for the checkout area
Product Portal for Architects, Lucerne, Switzerland
- C#, ASP.NET MVC 5, Entity Framework 6, jQuery, Bootstrap, VueJS, WCF, Visual Studio 2015
- Creating web pages for product selection for architects and planners using jQuery and VueJS view models
- SOAP client with WCF for product data from SAP system
- Controlling CAD drawing generator for PDF output
- Product filter for elevator visualization
- Designing visual product configurator
Payroll for Call Center, Frankfurt
- Visual Studio 2015, ASP.NET MVC 5, Entity Framework 6, jQuery, Bootstrap, Razor Views
- Creating data model and payroll calculations
- Creating input forms in HTML
Rollout Preparation for Mechanical Engineering Company, Nuremberg and Herzogenaurach
- MS Office 2013
- Part-time project
- Coordinating rollout capacities
- Preparing user help with SharePoint team sites
ALM Portfolio Management for Mechanical Engineering Company, Nuremberg and Herzogenaurach
- TFS 2013, visualstudio.com
- Selecting an ALM solution
- Evaluating platforms for software development on mobile devices and apps
- Planning technical and organizational priorities for global teams
- Test development of native mobile apps with Xamarin.Forms
- Test development of hybrid mobile apps with ASP.NET, HTML5, TypeScript
Project management to introduce a template system for MS Office for mechanical engineering companies, Nuremberg and
- MS Office 2013, MS Project
- Analyzing and planning technical and organizational priorities
- Requirements analysis and scheduling
- Selection process for the template system
- Concept, design, and pilot
Improving a template generator for MS Word
- Word 2013, C# with .NET 4.0, Open XML SDK 2.5
- Part-time project
- Extending a template generator for MS Word templates
- XML data binding to ContentControl fields
Test data for a chemical plant, Roth near Nuremberg
- SQL with Access 2010
- Part-time project
- Extending a small application to record test and storage data
Full-text search for a software vendor's web application, Landshut
- Java 1.7, Lucene, Hibernate 3.3, MariaDB
- Part-time project
- Improving the full-text search for the search form
- Testing the indexes for the full-text search
Payment portal for medical technology, Starnberg
- C# with .NET 4.5, ASP.NET MVC, HBCI API, PHP, jQuery, SEPA transactions
- Part-time project
- Creating web services in ASP.NET MVC for the SEPA backend
- Creating HTML pages with jQuery and PHP server functions for SEPA transactions
- MySQL database
Converting Excel files for a bank in Eschborn
- OMPM converter, C# with .NET 4.5 and batch scripts
- Preparing and executing the project with automation scripts
- Project lead for a team of 3
- Converting a large number of Excel files from Excel 2003 to Excel 2010
- Reviewing, fixing, and testing VBA macros for banking applications and financial services in Excel 2003/2010
Computer-assisted mammography for a Japanese medical technology manufacturer
- C# with .NET 3.5/4.5, WPF, DICOM, WCF, ADO.NET, MS SQL Server/T-SQL, Xunit
- Creating a medical technology application with WPF graphics for X-ray and mammography images
- Designing and implementing orthopedic measurements
Web application for food retail, Schwandorf
- C# with .NET 4, ASP.NET MVC 4, MS SQL Server with Entity Framework 4/T-SQL, XML, unit tests
- Developing a web application to manage quality assurance processes
Preparing documents for mechanical engineering, Krones AG, Neutraubling
- C# with .NET 4, Open XML, SQL, XML, WCF, NUnit tests
- Developing a document processing solution from Word 2010 format to an SAP system
- Designing and building a WCF web application with load balancing
Market research analysis, TNS Infratest, Munich
- C# with .NET 3.5, SQL, XML, Composite Application Blocks, MS unit tests
- Developing statistical evaluations with an SQL database
Financial Planning and Reporting for Datev AG, Nuremberg
- C# with .NET 3.5, Xlinq and XML, Office Open XML/Word 2007, SQL Server OLAP
- Creating reports from OLAP cubes with WordML for further processing with MS Word 2007
- Creating budget plans for municipalities as Word documents
Medical Image Processing for an International Medical Device Manufacturer, Unterschleissheim
- C# with .NET 3.5, WPF, XML serialization, MS SQL 2005, T-SQL
- Developing an application in medical technology with WPF graphics for X-ray images
Test Automation for Automotive Supplier, Vilsbiburg
- C# with .NET 3.5, WPF, XML serialization, sockets and threads
- Developing an application for test automation of assembly tables in WPF with image recognition using Dalsa Sherlock IPG
- Controlling electronic switches via sockets
- Creating configuration and serialization in XML
- Managing the test process with individual threads
- Testing image recognition of product images
- Unit tests with MSTest
- On-site commissioning at the plant in Romania
Data Analysis for Market Research Company, Nuremberg
- C# with .NET 2, WinForms, Reflection API, XML serialization
- Extending the application in graphical interfaces and data analysis for field research in broadcasting
- Creating application commands and command buffers
- Developing interfaces and data models, data export
- Implementing sorting and filtering logic
Feasibility Study for Template Document Processing
- Java, OpenOffice
- Analyzing the feasibility of document processing for templates
Infraserv GmbH, Burgkirchen
- C# with .NET 1.1, Oracle database, WinForms, Reflection API, XML and XML schema, XSLT
- Extending and revising an industrial shift and work scheduling application in the area of graphical interfaces and database integration
- Exporting data with formatting changes using XSLT
- Creating a module for database validation with XML configuration
Database import of XML data
- MySQL, StAX XMLReader, Java 1.5
- Reading XML documents for database import
Pharmacy software for MC Lindinger GmbH, Ruhstorf an der Rott
- PostgreSQL 8, SUSE Linux, Pascal script, partly Java with Eclipse, XML export, UML sequence diagrams
- Database development of a medical information system for pharmacists
- Application development and maintenance of GUI applications for inventory management with cash register and medical information system for pharmacies
- Design and automation of data preparation and reconciliation of medical data for several thousand customer systems
- Remote maintenance of customer systems
- Development of prototypes for reporting with Crystal Reports and Jasper Report
- XML export of data for archiving and auditing by the tax authorities in GDPdU format
- Representing small program sequences with UML sequence diagrams for documentation
Web application for Evidanza GmbH, Leiblfing
- C#, MS SQL 2000, ADO.NET, ASP.NET in .NET 1.1
- Prototype development for a web-based reporting application
- Access to MS SQL Server with ADO.NET
- Calculation and display of tables and cross tables with ASP.NET
Industry solution for KWP Informationssysteme GmbH, Landshut
- VB.NET, XML DOM in .NET 1.1, Access 2000 with ADO
- GUI and database development for a client-side module for an XML web service in the housing industry: handling quotes, product catalogs, orders, and invoices for an industry solution in construction
- Module for invoice entry book with extensions for postings and payments
Database Development for convey GmbH, Munich
- MS SQL 2000, Oracle 9, Sybase Anywhere 10
- Database development with an in-house IDE
- Application development in HTML and GUI for measurement registration and a law firm system using an in-house IDE
- Testing applications through manual functional tests and partially automated load tests using JavaScript
Studied Business Informatics at Deggendorf University of Applied Sciences
- First part-time computer science degree program in Bavaria
- Earned a Bachelor of Arts
Webdefender GmbH, Landshut
- Network administration on Windows 2000, firewall and Internet
- Administering Windows servers, Internet, network and database servers
- User support
Apprenticeship as a Network Administrator
- NT4, Windows networks
- Administration of Windows servers and network protocols
- MCSE certification exam
- Internship at Deutsche Telekom in Darmstadt
- Internship at Webdefender GmbH in Landshut
Work in Russia
- Project management in plant construction and technical sales
- Worked as an assistant to management and project planning at a newsprint mill in Russia
- Sales representative for a German window hardware and machinery manufacturer in central Russia
- Own retail business for window hardware and other goods
Project Assistant at BLV Publisher for Computer Books, Korschenbroich
- Worked as a project assistant at a computer book publisher
Precision Engineering Studies at Munich University of Applied Sciences
- Graduated with a diploma in precision engineering
Technical High School Pfarrkirchen
- Graduated with a university of applied sciences entrance qualification
Apprenticeship as an electrical systems installer at Wacker Chemie in Burghausen
- Certified as an electrical systems installer by the Chamber of Industry and Commerce
Industries Experience
See where this freelancer has spent most of their professional time. Longer bars indicate deeper hands-on experience, while shorter ones reflect targeted or project-based work.
Experienced in Manufacturing (12 years), Information Technology (8 years), Construction (6 years), Retail (5 years), Healthcare (5 years), and Education (5 years).
Business Areas Experience
The graph below provides a cumulative view of the freelancer's experience across multiple business areas, calculated from completed and active engagements. It highlights the areas where the freelancer has most frequently contributed to planning, execution, and delivery of business outcomes.
Experienced in Information Technology (23 years), Product Development (13.5 years), Project Management (5 years), Sales (4 years), Quality Assurance (3.5 years), and Business Intelligence (2.5 years).
Summary
- Architecture and prototypes for microservices and web applications
- over 20 years of software development
- 6 years of web development and web frontends with TypeScript/JavaScript: Angular, VueJs, Blazor, React
- over 3 years of backend systems with Java
- over 10 years of backend systems with C# .NET, Java, NodeJs
- over 10 years of REST & SOAP XML APIs
- over 5 years of GUI applications with WPF, Windows Forms C# / .NET
- 20 years of databases SQL & NoSQL
- over 3 years of cloud systems, Docker containers, MS Azure, AWS, functions, DB, IoT Hub
Over 25 years of IT experience, including 3 years in administration, networks, and firewalls
Customer and employee portals as web applications with backend systems in Java, .NET, TypeScript. Process and device data in the technical industry and automation technology. The focus is on quality and functionality of the applications for your company. I recommend architecture prototypes and domain-driven design to create balanced systems and avoid excessive technical effort.
Languages
Education
Deggendorf University of Applied Sciences
Bachelor of Arts in Business Information Systems · Business Information Systems · Deggendorf, Germany
Munich University of Applied Sciences
Diploma in Precision Engineering · Precision Engineering · Munich, Germany
Pfarrkirchen Technical High School
Advanced Technical College Entrance Qualification · Pfarrkirchen, Germany
Certifications & licenses
MCSE
Profile
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