Ingo G.
Senior Full Stack Software Developer + Software Architect
Experience
Development of a practice software to manage appointments including online booking
Reactive Systems
For a specialized diabetes center in Hamburg, I designed and implemented a custom practice software on my own. The goal was to develop a fully integrated solution to manage appointments, patients, and practitioners – including online booking for patients.
Tasks and Responsibilities:
- Architecture, design, and full development of the web application
- Implementation of the user interface with Angular, SCSS, and Bootstrap
- Backend development with ASP.NET Core, REST APIs, and MS SQL
- Implementation of a role-based user concept for parallel use by medical staff
- Integration of an online booking system for patients
- Conducting all tests and close coordination with medical staff
- Agile approach following Scrum, including iterative planning and direct requirements clarification with doctors and staff
Results and Impact:
- The software is used daily by up to 10 employees at the same time and has noticeably simplified the practice's appointment management
- Online booking by patients was successfully established and is used regularly
- The application impresses with intuitive usability and reliable performance
- High satisfaction from the practice management and team thanks to a practical, tailored implementation
Enhancement of a web application for vehicle inspections
GTÜ - Society for Technical Inspection
As part of a long-term project at GTÜ (Gesellschaft für Technische Überwachung mbH), I work as a full stack developer on the further development of a modern web application that digitally supports vehicle inspections such as main inspections (HU) or safety inspections (SP). The application is a central part of the company's latest software generation and is used nationwide in Germany.
Tasks and Responsibilities:
- Implementation of new features on the frontend and backend using Angular and ASP.NET Core
- Identification and resolution of performance issues on the server side
- Development and optimization of logging mechanisms for improved traceability and error analysis
- Continuous refactoring of legacy code to ensure long-term maintainability
- Participation in architecture decisions and technical further development of the overall system
- Close collaboration with QA, DevOps, and other development teams in an agile environment (Scrum/Kanban mix)
Results and Impact:
- Active contribution to resolving critical backend performance issues as a member of the performance team
- High customer satisfaction through rapid and reliable implementation of new requirements
- Continuous familiarization with complex system parts and stable delivery of high-quality code
PWA for time tracking and CMS to manage employees and working hours
Reactive Systems
For a construction company from Wetzlar, I planned and fully developed a progressive web app (PWA) for mobile time tracking and a web-based CMS to manage employees, construction sites, and working hours. The goal was to provide a user-friendly solution that works reliably both online and offline.
Tasks and Responsibilities:
- Architecture, design, and full implementation of the application
- Frontend development with Angular and SCSS, with special focus on offline capability
- Backend implementation with ASP.NET Core, Entity Framework Core, and MS SQL
- Building a CMS to manage employees, construction sites, and time entries
- Integration of synchronization logic for offline use of the PWA
- Close coordination with the owner and employees for a practical implementation
- Iterative approach following Scrum with regular feedback and direct testing in daily work
Results and Impact:
- Over 40 employees use the app daily on construction sites – even without an active internet connection
- The software was readily adopted by all employees thanks to its intuitive usability
- The owner was extremely satisfied with the quick delivery and tailored functionality of the solution
- The application has sustainably digitized and simplified time management in the company
Mobile app for performing and logging COVID-19 antigen rapid tests
Reactive Systems
- Technologies: Angular, Bootstrap, HTML, NativeScript, SCSS, TypeScript
Enhancement of a web application for submitting doctor invoices
Reactive Systems
- Technologies: AngularJS, Bootstrap, CSS, HTML, Java, JavaScript, SCSS
Web application for creating and publishing ad campaigns
Reactive Systems
- Technologies: Angular 5, ASP.NET, Facebook API, Google APIs, HTML, JavaScript, C#
Further development of a web application for submitting medical invoices
Reactive Systems
- Technologies: AngularJS, Bootstrap, CSS, HTML, JavaScript, SCSS
Development of website, API and database for real estate presentation
Reactive Systems
- Technologies: Angular 4, ASP.NET Core, Bootstrap, C#, Entity Framework Core
Further development of software for reward shops
Reactive Systems
- Technologies: AngularJS, ASP.NET WebAPI, C#, CSS, HTML, JS, Entity Framework, SQL
Development of software for particle measurement in cleanrooms
Reactive Systems
For an engineering firm in Langen, I developed custom software that covers the entire particle measurement process in cleanrooms – from managing measurement tasks, rooms and limit values to performing measurements on site and post-processing.
Tasks and Responsibilities:
- Planning and complete implementation of the application including architectural design
- Developing a back-office system with ASP.NET MVC and Entity Framework
- Building the user interface with AngularJS, Bootstrap and standard web technologies (HTML, JS)
- Implementing the mobile app for offline particle measurements on site
- Developing synchronization logic to transfer measurement data to the central server
- Close collaboration with the owner and technical staff for continuous optimization
- Agile approach using Scrum with iterative deliveries and hands-on validation
Results and Impact:
- Daily use of the software by over 10 employees – both in the field and in the office
- Offline capability enables reliable measurements directly at the customer
- The team quickly adopted the application thanks to its intuitive usability
- Noticeable improvements in efficiency and data quality in particle measurement and post-processing
Development of software for face recognition
Reactive Systems
- Technologies: AngularJs, ASP.NET WebAPI, C#, CSS, HTML, JS, Neurotechnology SDK, WCF
Further development of a geographic information system
Reactive Systems
- Technologies: Angular, ASP.NET WebAPI, HTML, JavaScript, Material Design, SCSS
Development of a reporting system
Reactive Systems
- Technologies: ASP.NET, C#, SQL Reporting Services
Summary
Since 2007, I have been working passionately as a software developer and software architect in desktop and web development. As a consultant, I help my clients improve their software quality. My specialty is building web-based business applications. I create backends in C# using the Microsoft .NET Framework as services or APIs, which usually run in the cloud or in local intranets. Frontends are implemented in JavaScript/TypeScript, HTML, and (S)CSS with Angular, and can be used on any browser-enabled system. My strengths are independent and responsible thinking and acting.
Languages
Education
University of Potsdam
Diploma in Computer Science · Computer Science · Potsdam, Germany · 1.7
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