About

Work Experience

• Owner & Full Stack Developer, Hüller IT-Services

  Sep, 2003 - Present

  Design, development, and operation of high-performance software solutions (on-premise & cloud) with a focus on energy industry processes, portfolio management, and asset management.

  • Design, development, and implementation of software solutions (cloud and on-premise)

  • Development of innovative products, especially for the energy sector

  • Design of database architectures

  • Modeling and optimization of data models

  • Implementation of database solutions (SQL, NoSQL)

  • Ensuring data integrity and access security

  • Setup and operation of DevOps processes and CI/CD pipelines (Azure DevOps, AWS)

  • AEVO: Coordination of company apprenticeship training

  • AEVO: Planning, execution, oversight, and completion of apprenticeship training

  • AEVO: Systems integration and application development

  • Direct customer communication from consulting to training and support

  • Architecture and development of backends, middleware, interfaces, and APIs (REST, SOAP, GraphQL)

  • Conducting trainings, workshops, and user education for customers and employees

  • Data protection management (GDPR) and IT security aspects

• Owner & Full Stack Developer, Timpe-Tools

  Jan, 2008 - Dec, 201811 years

  Managing Director, Systems Specialist and AEVO-certified instructor

  • Overall responsibility for company management and strategic direction

  • Planning, coordination, and supervision of projects and operations

  • Personnel management, employee development, and motivation

  • AEVO: Coordination of company apprenticeship training

  • AEVO: Planning, execution, oversight, and completion of apprenticeship training

  • AEVO: Systems integration and application development

  • Consulting clients on technical issues and tailored solutions

  • Design, development, and implementation of software solutions (cloud and on-premise)

  • Technical leadership: architecture, development of backends, middleware, interfaces, and APIs (REST, SOAP, GraphQL)

  • Modeling and optimization of data structures

  • Implementation of database solutions (SQL, NoSQL)

  • Ensuring data integrity and access security

  • Conducting trainings, workshops, and user sessions for clients and employees

  • Responsibility for data protection management (GDPR) and IT security aspects

• Software Consultant & Application Development, MBA GmbH

  Jan, 2000 - Dec, 20034 years

  Application Development and Customer Support

  • Development of custom software solutions for various industries

  • Software solutions for time tracking systems

  • Software solutions for inventory management systems

  • Consulting clients on technical issues and tailored solutions

  • Conducting trainings, workshops, and user sessions for clients

• Software Consultant & Application Development, GBS Softwaredienst

  Jan, 1995 - Dec, 19995 years

  Application Development

  • Development of database systems with interfaces in the field of warehouse management

  • Software solutions for inventory management systems

  • Software solutions for ordering systems (procurement)

• Field Sales Representative, Eismann

  May, 1990 - Nov, 19922 years 7 months

  Sales

  • Active acquisition of new customers within the assigned sales territory to expand the client base

  • Personalized consulting and support for existing customers directly on site

  • Presentation of the range of frozen products and targeted promotion of seasonal campaigns

  • Building and maintaining long-term customer relationships through service-oriented communication

  • Conducting product inspections, inventory management, and documentation in accordance with quality standards

Projects Experience

• INIPRO.ABS

  Jan, 2016 - Present

  Proprietary development (database system) for forecasting, pricing, and optimization in the energy sector, including both web and Windows client.

  • Windows client application

  • Frontend: DevExpress

  • Web client (single-page application)

  • Languages: C#, VB.Net, JavaScript, Python, React, GraphQL

  • Databases: MySQL

  • API: SAP EPM (SOAP web service), Office Excel

• Web Portal: hit-services.de

  Jan, 2012 - Present

  The web portal serves as a central digital platform to provide customized software solutions, consulting services, and technical information for businesses.

  • Concept and implementation of a WordPress presentation

  • Content creation: texts and graphics

  • HTML & CSS for theme and website layout customization

  • Responsive design for mobile optimization

  • Working with WordPress editors (Gutenberg), development of custom blocks

• Web Portal: ddd-scan.de

  Jan, 2023 - Present

  The web portal aims to provide innovative digital services that enable the creation and presentation of 360° virtual tours and digital 3D twins for real estate properties and other spaces.

  • Concept and implementation of a WordPress presentation

  • Content creation: texts and graphics

  • HTML & CSS for theme and website layout customization

  • Integration of the Matterport 3D scanning platform

  • Responsive design for mobile optimization

  • WordPress security modules, backend protection

  • Implementation of Matomo statistics module

• Application: FutureFix

  Jan, 2005 - Jan, 202520 years

  Forecasting and market data system for energy products, featuring backend services, price databases, price notifications, and automation.

  • Windows client application and Windows task-based service

  • Azure Static Web App, Azure Function, Azure Storage services

  • Frontend: DevExpress

  • Languages: C#, JavaScript, PowerShell, VB.Net, VB6, Excel VBA

  • Databases: Oracle, MySQL, MariaDB

  • APIs: EEX SFTP file server, Excel and CSV parsers for price import

• Application: Prosumer Relationship Manager (PRM)

  Jan, 2014 - Dec, 20207 years

  Asset and contract management system for virtual power plants, including market communication and inventory management.

  • Windows client application and Windows task-based service

  • Frontend: DevExpress

  • Languages: C#, JavaScript, Python, Excel VBA

  • Databases: Oracle, MariaDB

  • APIs: Office Excel, SCORE (DSO list)

• Application: E.CO Marketdata

  Jan, 2012 - Jul, 202412 years 6 months

  This application was developed to meet the requirements defined in the E.CO II project regarding the standardized provision of market data. Its purpose is to enable consistent market valuation of all relevant electricity, CO₂, gas, oil, and coal contracts, and to ensure the availability of market data without room for interpretation.

  • Windows client application

  • Frontend: DevExpress

  • Languages: C#, VB.Net

  • Databases: MySQL

  • Web service (SOAP)

  • APIs: Genic Data Manager, SmartDB (via ODBC), Office Excel

• Portfolio Management (INIPRO.PFM)

  Jan, 2015 - Dec, 20195 years

  Flexible database system for managing complex electricity and gas storage portfolios for B2B clients.

  • Windows client application

  • Windows services

  • Frontend: DevExpress

  • Languages: C#, VB.Net, Python

  • Databases: MySQL, Oracle

  • APIs: SAP EPM (SOAP web service), Office Excel

• MARKFIX – School Grade Management

  Aug, 2004 - Present

  Database system for managing student grades and generating school reports for schools in Lower Saxony, Germany.

  • Windows client application

  • Windows services

  • Frontend: DevExpress

  • Languages: C#, VB.Net, VB6

  • Databases: MySQL, MariaDB, Oracle

  • APIs: Sibank, Office Excel

Skills

Education

Interests

References